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石墨烯对光固化Al2O3陶瓷力学性能的影响 认领 引用
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作者 刘耀 余庆轩 +3 位作者 王中原 文蓉江 李澜波 占丽娜 《热加工工艺》 CAS 北大核心 2026年第13期75-82,共8页
针对光固化Al2O3陶瓷在脱脂烧结后易形成孔洞、力学性能差的问题,系统研究了石墨烯添加对陶瓷浆料流变性、沉降性、固化行为及烧结体力学性能的影响。采用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)对Al2O3粉体进行表面改性,并加入不同含... 针对光固化Al2O3陶瓷在脱脂烧结后易形成孔洞、力学性能差的问题,系统研究了石墨烯添加对陶瓷浆料流变性、沉降性、固化行为及烧结体力学性能的影响。采用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)对Al2O3粉体进行表面改性,并加入不同含量的石墨烯,制备高固相、低粘度的光固化浆料。通过傅里叶红外光谱、旋转流变仪、沉降试验及Beer-Lambert模型分析,优化了浆料配方与光固化工艺参数。结果表明:当KH560含量为2.5wt%、石墨烯含量为0.01wt%时,浆料粘度最低、沉降分层最少;在曝光时间4 s条件下,添加0.01wt%石墨烯的浆料透射深度为382μm,临界曝光能量为44.3 m J/cm2。经1750℃烧结后,陶瓷零件致密度达99.7%,弯曲强度为27.61 MPa,维氏硬度为13.45GPa。石墨烯通过位阻效应及裂纹偏转机制有效促进了烧结致密化并改善了力学性能。本研究为光固化增材制造高致密、高性能氧化铝陶瓷提供了试验依据。 展开更多
关键词 石墨烯 光固化 Al2O3陶瓷 浆料 流变性能
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釉中SiO2和Al2O3含量对青花瓷“晕散”的影响研究 认领 引用
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作者 李小龙 胡其国 +2 位作者 赵田贵 董伟霞 包启富 《中国陶瓷》 CAS CSCD 北大核心 2026年第7期79-88,共10页
青花瓷作为中国传统文化的瑰宝,在制备烧造过程中,因青花色料、釉料配方组成以及制备工艺的影响,易造成青花装饰出现发色不均匀、线条或者块面在不同朝代或者是同一朝代有不同程度的“晕散”。实验采用场发射扫描电镜(FE-SEM)、傅里叶光... 青花瓷作为中国传统文化的瑰宝,在制备烧造过程中,因青花色料、釉料配方组成以及制备工艺的影响,易造成青花装饰出现发色不均匀、线条或者块面在不同朝代或者是同一朝代有不同程度的“晕散”。实验采用场发射扫描电镜(FE-SEM)、傅里叶光谱(FTIR)、电子探针(EPMA)、光学显微镜(OM)等设备分析青花瓷釉中SiO2和Al2O3含量对青花装饰晕散距离、微观结构、釉层网络结构以及釉中Co2+浓度的影响,结合理论计算阐明了青花瓷“晕散”与釉料黏度之间的关系。实验结果表明,随着釉中SiO2和Al2O3含量的增加,釉层网络结构中Si—O—Si键数量增多并且增强,釉层黏度增大;黏流活化能拟合结果表明,黏流活化能增大,原子间作用力越强,Co2+在釉中扩散越困难,青花瓷线条的“晕散”距离从250μm减小到10μm。本研究有助于从物理化学角度理解青花“晕散”机制,为青花装饰工艺的优化提供科学依据。 展开更多
关键词 青花瓷 SiO2 Al 2O3 晕散 黏流活化能
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Preparation of Ni/Ti3O5@graphene oxide double heterojunction for enhancing hydrogen storage in MgH2 认领 引用 被引量：1
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作者 Zexuan Yang Zhendong Ma +4 位作者 Yongjin Zou Cuili Xiang Lixian Sun Yongpeng Xia Yong Shen Chua 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期579-591,共13页
Magnesium hydride serves as a promising solid-state hydrogen storage material owing to its high potential.However,its practical applications are constrained by the high enthalpy of hydrogen absorption and slow kinetic... Magnesium hydride serves as a promising solid-state hydrogen storage material owing to its high potential.However,its practical applications are constrained by the high enthalpy of hydrogen absorption and slow kinetics.In this study,we prepared a Ni/Ti3O5@graphene oxide(GO)dual-heterojunction composite material via solvent heating,electrostatic adsorption,and calcination to improve the hydrogen storage capabilities of MgH2.Adding Ni/Ti3O5@GO to MgH2 lowered the initial dehydrogenation temperature of MgH2 to 183℃;at a dehydrogenation temperature of 275℃,6.4 wt.%of H2 escaped from the MgH2 bulk.In addition,the hydrogen storage material absorbed 1.8 wt.%H2 at 30℃ for 30 min.The calculated activation energy of dehydrogenation was 48.221±0.141 kJ·mol-1,which was significantly lower than that of the ball-milled MgH2(112.63±1.44 kJ·mol-1).Mechanistic analysis results revealed that the heterojunction constructed from the multiphase compound system provided a large number of active sites and hydrogen diffusion routes,resulting in a synergistic catalytic effect that enhanced the hydrogen storage capacity of MgH2.In this work,we clarified the compositions of fuzzy interfaces in heterostructured materials by conducting ultraviolet photoelectron spectroscopy tests and identified key composite materials for the formation of heterojunctions. 展开更多
关键词 MGH2 Dual heterojunction Ni/Ti3O5@graphene oxide
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退火对原子层沉积W/Al2O3纳米薄膜形貌与电学性能的影响 认领 引用
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作者 高管哗 王国政 +1 位作者 蒋恩桐 王天昊 《物理化学进展》 2026年第2期110-121,共12页
在氮气气氛下对原子层沉积法制备的W/Al2O3薄膜进行了退火处理,利用高阻测试仪、扫描电子显微镜及能量色散X射线谱对薄膜进行表征,研究了退火对薄膜电学性能及形貌的影响。结果表明,在1 h退火时间下,400℃~600℃退火不仅使薄膜方块电阻... 在氮气气氛下对原子层沉积法制备的W/Al2O3薄膜进行了退火处理,利用高阻测试仪、扫描电子显微镜及能量色散X射线谱对薄膜进行表征,研究了退火对薄膜电学性能及形貌的影响。结果表明,在1 h退火时间下,400℃~600℃退火不仅使薄膜方块电阻数值明显降低,而且随退火温度升高呈持续下降趋势,当退火温度上升至700℃~800℃时,方块电阻偏离下降趋势,出现了明显上升趋势;当退火时间延长至2 h时,薄膜在400℃~500℃条件下仍保持下降趋势,但在600℃条件下方块电阻出现明显跃升。SEM与EDS结果表明,电学异常与薄膜表面连续性下降密切相关。 展开更多
关键词 原子层沉积 W/Al2O3纳米薄膜 退火 方块电阻 表面形貌
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Tb3+离子掺杂的Al2O3基发光材料的微波水热合成与性能 认领 引用
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作者 程文俊 刘静 张俊计 《纳米技术》 2026年第2期17-25,共9页
以Al(NO3)3·9H2O和尿素为原料,采用微波水热–焙烧法制备了稀土离子Tb3+掺杂的Al2O3基发光材料。利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、同步热分析仪(TG-DSC)、荧光光谱仪(FS)和Chromaticity Diagram等对产物的结构、形貌... 以Al(NO3)3·9H2O和尿素为原料,采用微波水热–焙烧法制备了稀土离子Tb3+掺杂的Al2O3基发光材料。利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、同步热分析仪(TG-DSC)、荧光光谱仪(FS)和Chromaticity Diagram等对产物的结构、形貌、发光性能和CIE色度进行分析和表征。结果表明,在180℃下微波水热30 min,可制备出结晶良好的叶片状勃姆石。勃姆石经不同温度的焙烧,由γ-Al2O3向δ-Al2O3转变,焙烧后的样品形貌基本保留前驱体的形貌。掺杂Al2O3基发光材料的发光来自Tb3+的5D4→7Fj (j = 3, 4, 5, 6)能级跃迁发射,发光强度随焙烧温度的提高趋于增强,CIE色度随焙烧温度变化不明显,呈绿色。 展开更多
关键词 微波水热法 Al2O3基质 发光性能
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Selective Hydrogenation of Butyne-1,4-diol to Butane-1,4-diol over Ni/Al_2O_3-SiO_2 Catalysts 认领 引用 被引量：2
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作者 Fang Jie Zhuang Changjian +2 位作者 Meng Jipeng Cheng Lang Lu Jiangyin 《China Petroleum Processing & Petrochemical Technology》 CAS 2018年第4期20-28,共9页
Ni/Al_2O_3-SiO_2 catalysts were synthesized via one-step method employing SiO_2 as an additive for the selective hydrogenation of butyne-1,4-diol(B_3D) to butane-1,4-diol(B1D). The prepared catalysts were evaluated by... Ni/Al_2O_3-SiO_2 catalysts were synthesized via one-step method employing SiO_2 as an additive for the selective hydrogenation of butyne-1,4-diol(B_3D) to butane-1,4-diol(B1D). The prepared catalysts were evaluated by a series of characterization techniques including BET, XRD, SEM, EDX-mapping, TEM, H_2-TPR, XPS, NH_3-TPD and Py-FTIR. Compared to Ni/Al_2O_3 catalyst, the SiO_2-doped samples exhibited better B_3D conversion. SiO_2 could help to form a strong interaction between NiO with the support, which inhibited Ni agglomeration at high temperature, improved the Ni dispersion, and enhanced the hydrogenation activity. B_1D selectivity was mainly influenced by the quantity of Lewis acid sites in addition to the Ni dispersion. The catalyst with a silica loading of 6.4% demonstrated an excellent selectivity of 75.18%(by 13% higher than the contrastive Ni/Al_2O_3 catalyst), which was attributed to the larger amount of Lewis acid sites and the moderate interaction between NiO with the support, which could facilitate the nickel dispersion on a preferable surface area of 176.3 m^2/g of support. 展开更多
关键词 Ni/Al2O3-SiO2 catalysts butyne-1,4-diol butane-1,4-diol hydrogenation
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CoMoNi/Al_2O_3-SiO_2催化剂用于掺炼焦化汽油扩大重整原料来源的研究 认领 引用
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作者 贾云刚 吴显军 +1 位作者 张铁珍 马守涛 《应用科技》 CAS 2017年第4期78-81,共4页
随着清洁油品标准的提高,人们对催化剂性能的要求也逐渐提高,传统Al_2O_3载体已不能满足人们的要求。通过对传统Al_2O_3载体加以改进,研制出一种适用于掺炼劣质加氢焦化汽油的重整预加氢催化剂CoMoNi/Al_2O_3-SiO_2。该剂具有较高的加... 随着清洁油品标准的提高,人们对催化剂性能的要求也逐渐提高,传统Al_2O_3载体已不能满足人们的要求。通过对传统Al_2O_3载体加以改进,研制出一种适用于掺炼劣质加氢焦化汽油的重整预加氢催化剂CoMoNi/Al_2O_3-SiO_2。该剂具有较高的加氢脱硫、脱氮及烯烃饱和性能,在反应压力2.5 MPa、体积空速4.0 h-1、氢油体积比200∶1的工艺条件下,进行了掺炼不同比例(0%、20%、50%)加氢焦化汽油原料的加氢性能评价,加氢产品均能达到重整原料的要求,并进行了催化剂1 500 h活性稳定性试验,试验结果表明催化剂具有良好的活性稳定性。 展开更多
关键词 CoMoNi/Al2O3-SiO2 重整 预加氢 FCC汽油 加氢脱硫 催化剂
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CoMoNi/Al_2O_3-SiO_2催化剂用于掺炼催化汽油扩大重整原料来源的研究 认领 引用
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作者 贾云刚 张铁珍 +3 位作者 何玉莲 邓旭亮 刁俊翔 刘宇 《精细石油化工进展》 CAS 2016年第5期32-34,共3页
对传统Al_2O_3载体加以改进,研制出一种适用于掺炼劣质催化裂化(FCC)汽油的重整预加氢催化剂CoMoNi/Al_2O_3-SiO_2。该催化剂具有较高的加氢脱硫、脱氮及烯烃饱和性能,在反应压力为2.5 MPa、体积空速为4.0 h-1、氢油体积比为200∶1的工... 对传统Al_2O_3载体加以改进,研制出一种适用于掺炼劣质催化裂化(FCC)汽油的重整预加氢催化剂CoMoNi/Al_2O_3-SiO_2。该催化剂具有较高的加氢脱硫、脱氮及烯烃饱和性能,在反应压力为2.5 MPa、体积空速为4.0 h-1、氢油体积比为200∶1的工艺条件下,掺炼不同比例催化汽油时,加氢产品均能达到重整原料的要求。催化剂1 500 h活性稳定性试验结果表明,该催化剂具有良好的活性稳定性。 展开更多
关键词 CoMoNi/Al2O3-SiO2催化剂 重整 预加氢 催化裂化汽油
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纳米Al2O3增强铝基复合材料制备技术及力学性能研究进展 认领 引用 被引量：4
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作者 荣智峥 魏午 +4 位作者 赵宇 毕舰镭 高阳 黄晖 聂祚仁 《材料工程》 EI CAS CSCD 北大核心 2025年第5期130-144,共15页
纳米Al2O3/Al复合材料作为轻质高性能结构材料,可实现轻量化节能减排,在航空航天、汽车工业、船舶制造、国防及5G电子通讯等领域具有广阔的应用前景。本文主要介绍高能球磨粉末冶金法、超声辅助铸造法、搅拌摩擦法、增材制造法、... 纳米Al2O3/Al复合材料作为轻质高性能结构材料,可实现轻量化节能减排,在航空航天、汽车工业、船舶制造、国防及5G电子通讯等领域具有广阔的应用前景。本文主要介绍高能球磨粉末冶金法、超声辅助铸造法、搅拌摩擦法、增材制造法、原位反应法等国内外纳米Al2O3/Al复合材料制备技术。总结分析纳米Al2O3增强体、增强体与铝基体的界面微结构、增强体的尺寸和含量、铝基体的晶粒尺寸、增强体的分散性和微观构型设计对纳米Al2O3/Al复合材料力学性能的影响。概述了纳米Al2O3/Al复合材料中主要的强化机制。最后,展望了纳米Al2O3/Al复合材料未来在高增强体体积分数的大尺寸制备技术、非均质构型优化以及高强耐热结构功能一体化等方面的发展方向。 展开更多
关键词 纳米Al2O3 铝基复合材料 制备方法 力学性能 强化机制
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Mechanical properties and plasma erosion resistance of BN_p/Al_2O_3-SiO_2 composite ceramics 认领 引用 被引量：5
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作者 段小明 贾德昌 +5 位作者 周玉 杨治华 王玉金 任凤琴 于达仁 丁永杰 《Journal of Central South University》 SCIE EI CAS 2013年第6期1462-1468,共7页
BNp/Al2O3-SiO2 system ceramic matrix composites with different volume fractions （10%-60%） of hexagonal BN particulates （BNp） were prepared by hot-press sintering technique. Phase components, microstructure, mechan... BNp/Al2O3-SiO2 system ceramic matrix composites with different volume fractions （10%-60%） of hexagonal BN particulates （BNp） were prepared by hot-press sintering technique. Phase components, microstructure, mechanical properties and plasma erosion resistance were also investigated. With the increase of h-BNp content, relative density and Vickers＇ hardness of the composite ceramics decrease, while the flexural strength, elastic modulus and fracture toughness increase and then decrease. The plasma erosion resistance linearly deteriorated with the increase of BNp content which is mainly determined by the density, crystal structure and atomic number of the elements. 展开更多
关键词 BNp/Al2O3-SiO2 composite ceramics microstructures mechanical properties plasma erosion resistance
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Catalytic decomposition of CH_4 over Ni-Al_2O_3-SiO_2 catalysts:Influence of pretreatment conditions for the production of H_2 认领 引用 被引量：2
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作者 Jangam Ashok Gangadhara Raju +2 位作者 Padigapati Shiva Reddy Machiraju Subrahmanyam Akula Venugopal 《Journal of Natural Gas Chemistry》 2008年第2期113-119,共7页
This article reports the production of COx free hydrogen and carbon nanofibers by the catalytic decomposition of methane over Ni-Al2O3-SiO2 catalysts. The influence of reaction temperature, pretreatment temperature, a... This article reports the production of COx free hydrogen and carbon nanofibers by the catalytic decomposition of methane over Ni-Al2O3-SiO2 catalysts. The influence of reaction temperature, pretreatment temperature, and effect of reductive pretreatment on the decomposition of methane activity is investigated. The physico-chemical characteristics of fresh and deactivated samples were characterized using BET-SA, XRD, TPR, SEM/TEM, CHNS analyses and correlated with the methane decomposition results obtained. The Ni-Al-Si （4 ： 0.5 ： 1.5） catalyst reduced with hydrazine hydrate produced better H2 yields of ca. 1815 mol H2/mol Ni than the catalyst reduced with 5% H2/N2. 展开更多
关键词 in situ reduction Ni-Al2O3-SiO2 catalyst methane decomposition hydrogen production carbon nanofibers
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钙改性NiO/ZnO-Al_2O_3-SiO_2吸附剂反应吸附脱硫效果 认领 引用 被引量：2
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作者 高帅 孟春 +2 位作者 周妮妮 沈本贤 凌昊 《华东理工大学学报（自然科学版）》 CAS CSCD 北大核心 2015年第4期435-442,共8页
通过浸渍沉淀法制备了钙改性NiO/ZnO-Al2O3-SiO2汽油脱硫吸附剂,并与S-Zorb工业吸附剂进行比较。物理性质分析、X射线衍射和原位吡啶吸附红外光谱表征结果表明,钙改性NiO/ZnO-Al2O3-SiO2吸附剂比表面积为137.7m2/g,孔容为0.31cm3/g,NiO... 通过浸渍沉淀法制备了钙改性NiO/ZnO-Al2O3-SiO2汽油脱硫吸附剂,并与S-Zorb工业吸附剂进行比较。物理性质分析、X射线衍射和原位吡啶吸附红外光谱表征结果表明,钙改性NiO/ZnO-Al2O3-SiO2吸附剂比表面积为137.7m2/g,孔容为0.31cm3/g,NiO及ZnO晶体分布均匀且L酸总量更多。在420℃、2.9 MPa、质量空速10.98h-1、氢油体积比48∶1的条件下,催化裂化汽油中的硫含量从243.38μg/g降至10μg/g以下,汽油辛烷值仅降低0.3;新鲜和再生吸附剂穿透硫容分别可达57.12mg/g及47.33mg/g,经过长周期再生循环后脱硫性能保持优良。同时,物理性质分析、光电子能谱等表征结果表明失活吸附剂再生后效果明显改善,汽油中硫元素最终被ZnO吸附生成ZnS。 展开更多
关键词 钙 NiO/ZnO-Al2O3-SiO2 吸附剂 汽油 脱硫
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Ni/Al_2O_3-SiO_2催化剂表面性质及顺酐加氢性能 认领 引用 被引量：2
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作者 刘盼盼 张因 +1 位作者 李海涛 赵永祥 《工业催化》 CAS 2014年第5期352-356,共5页
以Al2O3质量分数为10%的Al2O3-SiO2复合氧化物为载体,通过浸渍法制备一系列不同Ni负载量的Ni/Al2O3-SiO2催化剂。运用BET、XRD、H2-TPR和NH3-TPD-MS方法研究催化剂表面性质随活性金属Ni负载量的变化规律,探讨催化剂表面性质的变化对其... 以Al2O3质量分数为10%的Al2O3-SiO2复合氧化物为载体,通过浸渍法制备一系列不同Ni负载量的Ni/Al2O3-SiO2催化剂。运用BET、XRD、H2-TPR和NH3-TPD-MS方法研究催化剂表面性质随活性金属Ni负载量的变化规律,探讨催化剂表面性质的变化对其顺酐加氢活性、选择性及催化剂稳定性的影响。结果表明,Ni/Al2O3-SiO2催化剂中的Ni质量分数由5.0%增加至12.5%时,γ-丁内酯收率由7.9%快速增至38.9%,进一步增加Ni质量分数至20.0%,γ-丁内酯收率增加趋于平缓。催化剂中Ni活性物种与催化剂酸性中心的数量是影响催化剂顺酐加氢活性的主要原因。 展开更多
关键词 催化化学 Ni Al2O3-SiO2催化剂 顺酐选择加氢 γ-丁内酯
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Optimization of the operating conditions in a TiO_2/Fe_3O_4-SiO_2 photocatalytic reactor for the treatment of industrial wastewater containing Procion Red MX-5B 认领 引用 被引量：1
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作者 王爱杰 周爱娟 +2 位作者 王丽燕 刘敏 陈兆波 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第2期1-7,共7页
According to the design principle of the central composite experimental,the method of response surface analysis with three factors and three levels was adopted based on one factor test.A second-order quadratic equatio... According to the design principle of the central composite experimental,the method of response surface analysis with three factors and three levels was adopted based on one factor test.A second-order quadratic equation for photocatalysis of Procion Red MX-5B was built.Response surface and contour were graphed with the decoloration rate of Procion Red MX-5B as the response value.Based on the analysis of the response surface plots and their corresponding contour plots,effects of pH value,irradiation time and catalyst loading were explored.By using this new method,the optimum decoloration condition was obtained as follows:pH value,1.3;irradiation time,49.9 min;catalyst loading,0.57 g/L.In the optimization,R-Squared and Adj R-Squared correlation coefficients for quadratic model were evaluated quite satisfactorily as 0.9310 and 0.8620,respectively.Under the optimum conditions established,the performance of 99.47% for color removal was experimentally reached.It was found that all factors considered have an important effect on the decolorization efficiency of Procion Red MX-5B.By the ANOVA analysis and model confirmation the optimal solution obtained using RSM was experimentally validated and credible with preferable instructional ability for experiments. 展开更多
关键词 TiO2/Fe3O4-SiO2 photocatalyst response surface methodology(RSM) optimization of decoloration condition
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THE STRUCTURE AND PROPERTIES OF Li_2O-Al_2O_3-SiO_2LOW EXPANSION GLASS CERAMICS CONTAINING B_2O_3 认领 引用 被引量：8
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作者 XIAO Jing LI Hong CHENG Jinshu Wuhan University of Technology Wuhan University of Metallurgy 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1999年第1期41-45,共5页
Through measuring the coefficient of linear expansion, the structure and properties of the Li2O-Al2O3-SiO2 low expansion glass ceramics containing B2O3 are studied by JR and XRD. It is shoutn that the IR method is eff... Through measuring the coefficient of linear expansion, the structure and properties of the Li2O-Al2O3-SiO2 low expansion glass ceramics containing B2O3 are studied by JR and XRD. It is shoutn that the IR method is efficient in the study of the glass-ceramics structure. There is a " Boron abnormality" in the system which has an important influence on the properties of the glass-ceramics. 展开更多
关键词 boron abnormality Li2O-Al2O3-SiO2 system glass ceramics
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Unveiling Ni/Mn synergies in P2/O3 biphasic layered oxides for high-performance sodium-ion battery cathodes 认领 引用
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作者 Yu-Bo Yang Yong-Chun Li +5 位作者 Yuan Ping Ji-Shun Yang Yan-Pu Yang Xiao-Wei Miao Hai-Dong Liu Gang Yang 《Rare Metals》 SCIE EI CAS CSCD 2025年第11期8465-8475,共11页
P2-type nickel-manganese-based layered oxides are promising cathode materials for sodium-ion batteries(SIBs),but their application is limited by initial specific capacity and anion redox instability.Herein,a P2/O3 bip... P2-type nickel-manganese-based layered oxides are promising cathode materials for sodium-ion batteries(SIBs),but their application is limited by initial specific capacity and anion redox instability.Herein,a P2/O3 biphasic Na0.67Ni0.33Mn0.6Cu0.05Mg0.07Ti0.01O2(Ni33Mn60)was prepared by adjusting the Ni/Mn ratio with as Na0.67Ni0.23Mn0.65Cu0.05Mg0.07Ti0.01O2(Ni23Mn65)matrix and is reported to exhibit high initial discharge capacity,cyclability and rate capability.The density functional theory(DFT)calculation and experimental data prove the enhancement of the Mn3+/Mn4+redox process to improve the specific discharge capacity and the P2/O3biphasic structure to optimize the anion kinetics.The synthesized oxide Ni33Mn60 delivers a high initial discharge specific capacity of 140.21 mAh g-1,a crucial discharge capacity of 76.07 mAh g-1at 10C,a preferable capacity retention rate of 78.97%after 200 cycles at 5C and cycle stability at high voltages above 4.3V.In situ X-ray diffraction(XRD)and galvanostatic intermittent titration technique(GITT)tests show that Ni33Mn60 has reversible structure evolution and fast Na+diffusion kinetics due to the ion effect and unique P2/O3 biphasic structure,respectively.This work provides a new thought about adjusting matrix ratio for the preparation of P2/O3 biphasic cathode materials for advanced SIBs. 展开更多
关键词 Ni/Mn synergy P2/O3 biphasic Electrochemical performance Cathode materials Sodiumion batteries
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Al2O3coated polyimide porous films enable thin yet strong polymer-in-salt solid-state electrolytes for dendrite-free lithium metal batteries 认领 引用
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作者 Haotian Zhang Shengfa Feng +6 位作者 Mufan Cao Xiong Xiong Liu Pengcheng Yuan Yaping Wang Min Gao Long Pan Zhengming Sun 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第8期492-497,共6页
The ineluctable introduction of lithium salt to polymer solid-state electrolytes incurs a compromise between strength,ionic conductivity,and thickness.Here,we propose Al2O3-coated polyimide(AO/PI)porous film as ... The ineluctable introduction of lithium salt to polymer solid-state electrolytes incurs a compromise between strength,ionic conductivity,and thickness.Here,we propose Al2O3-coated polyimide(AO/PI)porous film as a high-strength substrate to support fast-ion-conducting polymer-in-salt(PIS)solid-state electrolytes,aiming to suppress lithium dendrite growth and improve full-cell performance.The Al2O3coating layer not only refines the wettability of polyimide porous film to PIS,but also performs as a high modulus protective layer to suppress the growth of lithium dendrites.The resulting PI/AO@PIS exhibits a small thickness of only 35μm with an outstanding tensile strength of 11.3 MPa and Young's modulus of 537.6 MPa.In addition,the PI/AO@PIS delivers a high ionic conductivity of 0.1 m S/cm at 25°C.As a result,the PI/AO@PIS enables symmetric Li cells to achieve exceptional cyclability for over 1000 h at 0.1 m A/cm2without noticeable lithium dendrite formation.Moreover,the PI/AO@PIS-based LiFePO4||Li full cells demonstrate outstanding rate performance(125.7 m Ah/g at 5 C)and impressive cycling stability(96.1%capacity retention at 1 C after 200 cycles).This work highlights the efficacy of enhancing the mechanical properties of polymer matrices and extending cell performance through the incorporation of a dense inorganic interface layer. 展开更多
关键词 Polymer-in-salt solid-state electrolytes Inorganic interface layer Al2O3interfaciAl layer Li dendrites Cycling performance
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TPD法研究Ni-W/F-Al_2O_3-SiO_2催化剂的酸性 认领 引用
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作者 朱建军 林西平 +1 位作者 谭其群 侯学洪 《常州大学学报（自然科学版）》 CAS 1996年第2期6-9,共4页
采用TPD法在排除了再吸附现象的条件下，研究了F含量对Ni－W／F－Al2O3—SiO2催化剂酸性的影响，并将测定结果与Hammett指示剂法测定结果进行了关联，结果表明，F对该催化剂两种不同强度的酸性中心具有不同程度的影响，F含量的变化对催... 采用TPD法在排除了再吸附现象的条件下，研究了F含量对Ni－W／F－Al2O3—SiO2催化剂酸性的影响，并将测定结果与Hammett指示剂法测定结果进行了关联，结果表明，F对该催化剂两种不同强度的酸性中心具有不同程度的影响，F含量的变化对催化剂弱酸中心的酸强度和酸浓度无显著的影响，而对催化剂强酸中心的影响较大，当F含量为1．5％左右时其酸度具有极大值，且随着F含量的增加，强酸中心的酸强度逐渐增强。 展开更多
关键词 TPD 再吸附 Ni-W/F—Al2O3-SiO2催化剂
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遮光剂掺杂Al_2O_3-SiO_2气凝胶/莫来石纤维毡复合材料的高温隔热性能研究 认领 引用 被引量：27
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作者 朱召贤 王飞 +2 位作者 姚鸿俊 董金鑫 龙东辉 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2018年第9期969-975,共7页
分别以TiCl_4和ZrOCl_2·8H_2O作为钛源和锆源,经过溶胶–凝胶和超临界CO_2干燥过程,将遮光剂粒子TiO_2和ZrO_2掺入到Al_2O_3-SiO_2气凝胶,并进一步以莫来石纤维毡为增强相制备出具有一定力学性能的耐高温气凝胶复合材料,分别探究... 分别以TiCl_4和ZrOCl_2·8H_2O作为钛源和锆源,经过溶胶–凝胶和超临界CO_2干燥过程,将遮光剂粒子TiO_2和ZrO_2掺入到Al_2O_3-SiO_2气凝胶,并进一步以莫来石纤维毡为增强相制备出具有一定力学性能的耐高温气凝胶复合材料,分别探究了两种遮光剂粒子对复合材料的微观结构、力学性能和热导率的影响。结果显示:遮光剂粒子的引入可以有效阻止气凝胶在高温下的塌陷和团聚,保持气凝胶高孔隙率的特性;复合材料呈现典型的气凝胶填充纤维结构,并且具有轻质(0.21~0.24 g·cm–1)和高强度(弯曲强度为0.98~1.26 MPa)的优异性能,拓展了材料的实用性;在1050℃的高温下,由于TiO_2和ZrO_2粒子对红外电磁波具有吸收和散射作用,可以将复合材料的热导率由0.098 W·m-1·K-1分别降低至0.085 W·m-1·K-1和0.076 W·m-1·K-1,从而有效提高材料的高温隔热性能。 展开更多
关键词 Al2O3-SiO2气凝胶 红外遮光剂 热导率 高温隔热性能
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Selective hydrogenation of CO2 to methanol over Ni/In2O3 catalyst 认领 引用 被引量：32
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作者 Xinyu Jia Kaihang Sun +2 位作者 Jing Wang Chenyang Shen Chang-jun Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第11期409-415,共7页
An In2O3 supported nickel catalyst has been prepared by wet chemical reduction with sodium borohydride(NaBH4) as a reducing agent for selective hydrogenation of carbon dioxide to methanol. Highly dispersed Ni species ... An In2O3 supported nickel catalyst has been prepared by wet chemical reduction with sodium borohydride(NaBH4) as a reducing agent for selective hydrogenation of carbon dioxide to methanol. Highly dispersed Ni species with intense Ni-In2O3 interaction and enhanced oxygen vacancies have been achieved.The highly dispersed Ni species serve as the active sites for hydrogen activation and hydrogen spillover.Abundant H adatoms are thereby generated for the oxygen vacancy creation on the In2O3 surface. The enhanced surface oxygen vacancies further lead to improved CO2 conversion. As a result, an effective synergy between the active Ni sites and surface oxygen vacancies on In2O3 causes a superior catalytic performance for CO2 hydrogenation with high methanol selectivity. Carbon monoxide is the only by product detected. The formation of methane can be ignored. When the reaction temperature is lower than 225 ℃,the selectivity of methanol is 100%. It is higher than 64% at the temperature range between 225 ℃ and 275 ℃. The methanol selectivity is still higher than 54% at 300 ℃ with a CO2 conversion of 18.47% and a methanol yield of 0.55 gMeOHg-1cath-1(at 5 MPa). The activity of Ni/In2O3 is higher than most of the reported In2O3-based catalysts. 展开更多
关键词 Methanol CO2 hydrogenation Indium oxide Ni/In2O3 Oxygen vacancy
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