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Nano Research 2024年第5期17卷 4203-4210页

作者： Gangyi Xiong Jiayu Yu yalan xing Puheng Yang Shichao Zhang School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Physics Science and Nuclear Energy Engineering Beihang UniversityBeijing 100191China

Although lithium metal is considered a promising anode for advanced Li-S and Li-air batteries,the uncontrolled dendrite growth and infinite volume change impede its practical ***,we report an ideal framework composed of carbonized bacterial cellulose(CBC)nanofibers,which shows intrinsic lithiophilicity to molten lithium without any lithiophilic surface *** wetting behavior of molten lithium can be significantly improved because its surface functional groups provide thermodynamical driving force,and the high surface roughness derived from nanocracks leads to rapid infusion in *** hybrid anode exhibits long cycle life up to 2000 h and excellent deep stripping-platting capacity up to 20 mAh·cm^(-2).When the anode is assembled with LiFePO_(4) cathode,the full cell delivers a good cycling stability up to 700 *** is attributed to the intrinsic lithiophilic scaffold,which can not only lower the nucleation barrier of Li and provide uniform nucleation sites for stable Li stripping/plating,but also offer interspace to accommodate volume fluctuation of lithium during long *** work provides a new manner to achieve a series of intrinsic lithiophilic carbon skeletons based on the large family of biomass materials and organic materials.

关键词： intrinsic lithiophilicity lithium metal anode bacterial cellulose lithium dendrite long cycling life

Fabrication and Dealloying Behavior of Monolithic Nanoporous Copper Ribbons with Bimodal Channel Size Distributions

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Journal of Materials Science & Technology 2012年第8期28卷 693-699页

作者： Wenbo Liu Shichao Zhang Ning Li Jiwei Zheng yalan xing School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Manufacturing Science and Engineering Sichuan UniversityChengduSichuan 610065China

Monolithic nanoporous copper （NPC） ribbons with bimodal channel size distributions can be fabricated through chemical dealloying of Mg-32 Cu alloy in an acidic solution at room temperature. The microstructure of the as- dealloyed samples was characterized by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis. These NPC ribbons are composed of interconnected large-sized channels （hundreds of nm） with highly porous channel walls （tens of nm）. Both large- and small-sized channels are open, bicontinuous, and interpenetrating. Additionally, it is the first time to find that the evolution process of porous structure along the thickness direction of samples during the dealloying is from the interior to exterior, which is just contrary to the coarsening process along the thickness direction during the post-dealloying. Meanwhile, the corresponding mechanism is discussed in detail.

关键词： Nanoporous copper Dealloying Bimodal channel size distribution Microstructure Electron microscopy

C(sp^3)–H bond functionalization of non-cyclic ethers by decarboxylative oxidative coupling with α,β-unsaturated carboxylic acids

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Science China Chemistry 2018年第2期61卷 180-183页

作者： Tong Zhang xing-Wang Lan Yu-Qiang Zhou Nai-xing Wang Yue-Hua Wu yalan xing Jia-Long Wen Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beifing 100049 China Department of Chemistry William Paterson University of New Jersey New Jersey 07470 United States Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Beijing 100083 China

A copper-catalyzed decarboxylative oxidative coupling of α,β-unsaturated carboxylic acids with non-cyclic ethers is *** method provides a new approach for C(sp^3)–H bond functionalization of non-cyclic ethers. Mech... 详细信息

关键词： C(sp^3)–H bond functionalization non-cyclic ethers decarboxylative oxidative coupling α β-unsaturated carboxylic acids

Structure-design and theoretical-calculation for ultrasmall Co_(3)O_(4) anchored into ionic liquid modified graphene as anode of flexible lithium-ion batteries

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Nano Research 2022年第3期15卷 2104-2111页

作者： Longda Cong Shichao Zhang Hengyao Zhu Weixin Chen Xueyan Huang yalan xing Jun Xia Puheng Yang Xia Lu School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Physics Science and Nuclear Energy Engineering Beihang UniversityBeijing 100191China School of Materials Sun Yat-sen UniversityShenzhen 518107China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Cobalt oxide(Co_(3)O_(4))is currently suitable in energy storage applications because of its high capacity based on the conversion reaction ***,unmodified Co_(3)O_(4)suffers from distinctly inferior rate capability and poor cycling *** the basis of the aforementioned considerations and density functional theory(DFT)simulations,the three-dimensional hierarchical porous structure(HPS)ultrasmall Co_(3)O_(4)anchored into ionic liquid(IL)modified graphene oxide(GO)has been successfully prepared(ultrasmall/Co_(3)O_(4)-GA-IL).The ultrasmall/Co_(3)O_(4)-GA-IL consists of Co_(3)O_(4)co-assembled with IL modified GO to generate the HPS which can facilitate ion transfer channels through reduction of the electron and ion transportation path and transmission *** addition,N-doping graphene can enhance the inherent electrical conductivity of Co_(3)O_(4),which is proved by the DFT *** virtue of the novel superstructure,the ultrasmall/Co_(3)O_(4)-GA-IL electrode demonstrates a high reversible capacity of 1,304 mAh·g^(−1),an enhanced high-rate capability(715 mAh·g^(−1)at 5 C),and a capacity retention of 98.4%even after 500 cycles at 5 C rate,which corresponds to 0.0003%capacity loss per *** cells based on the cathode are further fabricated and demonstrate excellent mechanical and electrochemical properties under bent and folded state,highlighting the practical application of our deliberately designed electrode in wearable electronics.

关键词： co-assembly ultrasmall cobalt oxide ionic liquid flexible lithium-ion batteries hierarchical porous structure density functional theory simulations

Electrolyte induced synergistic construction of cathode electrolyte interphase and capture of reactive free radicals for safer high energy density lithium-ion battery

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Journal of Energy Chemistry 2023年第12期87卷 207-214,I0006页

作者： Mengfei Ding Xuning Feng Yong Peng Jing Jing Tong Bowen Hou yalan xing Weifeng Zhang Li Wang Yu Wu Jiabin Lv Chunyan Luo Dejun Xiong Shichao Zhang Minggao Ouyang School of Materials Science and Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Intelligent Green Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Mechanical and Electronic Control Engineering Beijing Jiaotong UniversityBeijing 100044China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Farasis Energy(GanZhou)Co.Ltd GanZhou 341000JiangxiChina

As the energy density of battery increases rapidly,lithium-ion batteries(LIBs)are facing serious safety issue with thermal runaway,which largely limits the large-scale applications of high-energy-density *** is generally agreed that the chemical crosstalk between the cathode and anode leads to thermal runaway of ***,a multifunctional high safety electrolyte is designed with synergistic construction of cathode electrolyte interphase and capture of reactive free radicals to limit the intrinsic pathway of thermal *** cathode electrolyte interphase not only resists the gas attack from the anode but suppresses the parasitic side reactions induced by *** the function of free radical capture has the ability of reducing heat release from thermal runaway of *** dual strategy improves the intrinsic safety of battery prominently that the triggering temperature of thermal runaway is increased by 24.4℃and the maximum temperature is reduced by 177.7℃.Simultaneously,the thermal runaway propagation in module can be ***,the electrolyte design balances the trade-off of electrochemical and safety performance of high-energy *** capacity retention of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)|graphite pouch cell has been significantly increased from 53.85%to 97.05%with higher coulombic efficiency of 99.94%at operating voltage extended up to 4.5 V for 200 ***,this work suggests a feasible strategy to mitigate the safety risk of high-energy-density LIBs without sacrificing electrochemical performances.

关键词： Lithium-ion battery Electrolyte Battery safety Thermal runaway

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锂离子电池新型三维纳米结构负极研究进展

航空学报 2014年第10期35卷 2776-2783页

作者：邢雅兰王胜彬张世超王文旭北京航空航天大学材料科学与工程学院北京100191

高性能锂离子电池在微/小型侦察机和空间飞行器等应用中有重要意义。构建三维纳米结构负极,是提高锂离子电池性能的有效方法。综述了国内外锂离子电池新型三维纳米结构负极材料的发展,将其分为3种类型,分别是三维纳米多孔结构、三维纳... 详细信息

高性能锂离子电池在微/小型侦察机和空间飞行器等应用中有重要意义。构建三维纳米结构负极,是提高锂离子电池性能的有效方法。综述了国内外锂离子电池新型三维纳米结构负极材料的发展,将其分为3种类型,分别是三维纳米多孔结构、三维纳米阵列结构和三维纳米网络结构。涉及的材料包括碳类材料、合金类材料与过渡金属氧化物材料。相对于传统二维平面负极,三维纳米结构电极可以减小离子迁移距离、增加电极/电解液界面面积、缓冲活性材料充放电体积变化,从而可以提高材料的储能容量,提高电极的循环稳定性,改善电极的倍率性能。

关键词：锂离子电池三维纳米结构负极介孔材料阵列网络结构

去合金化Mn-Cu合金制备纳米多孔铜及其形貌演化研究

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热加工工艺 2011年第24期40卷 40-43页

作者：郑继伟张世超刘文博邢雅兰北京航空航天大学材料科学与工程学院北京100191

在不同腐蚀介质中研究了化学及电化学去合金化Mn-Cu合金制备纳米多孔铜(NPC)条件及其形貌演化规律。结果表明,腐蚀介质对纳米多孔铜形成有显著影响,酸性强弱会直接改变孔径大小,在酸性更弱的有机酸中由于配合物的形成,在表面获得规则球... 详细信息

在不同腐蚀介质中研究了化学及电化学去合金化Mn-Cu合金制备纳米多孔铜(NPC)条件及其形貌演化规律。结果表明,腐蚀介质对纳米多孔铜形成有显著影响,酸性强弱会直接改变孔径大小,在酸性更弱的有机酸中由于配合物的形成,在表面获得规则球状结构。Mn-Cu合金去合金化演化行为研究显示区域腐蚀、均一多孔演化以及多孔结构粗化构成整个去合金化过程。此外,进一步研究发现电化学电位同样对纳米多孔形貌影响显著,-0.2 V及0V可选择性腐蚀掉Mn原子,形成均一多孔结构,而0.2 V下Mn、Cu原子的共同溶解导致非多孔形貌的产生。

关键词：去合金化纳米多孔铜 Mn-Cu合金腐蚀介质电化学电位

基于微乳液法的多孔棒状结构MnFe2O4制备及电化学性能

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储能科学与技术 2019年第6期8卷 1132-1136页

作者：丛龙达邢雅兰靳宝贻吴昊赵光金张世超北京航空航天大学材料科学与工程学院北京100191 国网河南省电力公司河南郑州450000

本工作以硫酸亚铁和乙酸锰为原料,在表面活性剂双(2-乙基己基)琥珀酸酯磺酸钠气溶胶作用下,通过微乳液法合成了前体,锻烧后得到了具有多孔结构的一维棒状MnFe2O4材料.棒直径约200 nm、长度2~3 μm,含有大量孔径在13~35 nm的介孔结构.将... 详细信息

本工作以硫酸亚铁和乙酸锰为原料,在表面活性剂双(2-乙基己基)琥珀酸酯磺酸钠气溶胶作用下,通过微乳液法合成了前体,锻烧后得到了具有多孔结构的一维棒状MnFe2O4材料.棒直径约200 nm、长度2~3 μm,含有大量孔径在13~35 nm的介孔结构.将制备的MnFe2O4作为锂离子电池负极材料,进行电化学性能测试,在100 mA/g的电流密度下200圈循环仍能保持630 mA·h/g以上的容量,同时也具有良好的倍率性能.研究显示多孔棒状MnFe2O4是一种具有应用前景的锂离子电池负极材料.

关键词：锂离子电池微乳液法多孔电极一维结构

新型全固态聚合物电解质PEG475-DMAA的制备及其电化学性能研究

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轻工学报 2018年第5期33卷 69-76页

作者：邢雅兰陈泓州吴昊熊刚毅张世超北京航空航天大学材料科学与工程学院北京100191

采用无需有机溶剂的光聚合合成工艺,以聚乙二醇甲基丙烯酸酯(PEG475)为基体、N,N二甲基丙烯酰胺(DMAA)为交联剂,引入增塑剂丁二腈(SN),制备新型全固态聚合物电解质PEG475-DMAA,并对其电化学性能进行测试.结果表明:当SN的添加量为10%(质... 详细信息

采用无需有机溶剂的光聚合合成工艺,以聚乙二醇甲基丙烯酸酯(PEG475)为基体、N,N二甲基丙烯酰胺(DMAA)为交联剂,引入增塑剂丁二腈(SN),制备新型全固态聚合物电解质PEG475-DMAA,并对其电化学性能进行测试.结果表明:当SN的添加量为10%(质量分数)时,该电解质体系的离子电导率最大,约为4×10-5S/cm,相对于聚氧乙烯体系提高了3个数量级;该电解质的稳定窗口在5. 0 V以上,可满足目前使用的电解质体系对电压稳定性的要求;该电解质在270℃附近有良好的热稳定性;由该电解质膜组装的锂离子电池的初始容量较低与商品化锂离子电池还有比较大的差距,未来需进一步提高该电解质膜的离子电导率,改善其电化学循环性能.

关键词：锂离子电池全固态聚合物电解质 PEG475-DMAA膜光聚合反应

剪切变稀型SPH非牛顿流体的预测-校正方法

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计算机辅助设计与图形学学报 2017年第5期29卷 906-913页

作者：张雅斓班晓娟王笑琨刘幸北京科技大学计算机与通信工程学院北京100083

对非牛顿流体的模拟一直是基于物理的流体模拟技术的研究难点.为解决SPH流体模拟中非牛顿流体粒子凝聚成团导致断层现象,提出一种针对剪切变稀型非牛顿流体的预测-校正方法.首先使用Cross模型对流体进行统一建模;然后计算每个流体粒子... 详细信息

对非牛顿流体的模拟一直是基于物理的流体模拟技术的研究难点.为解决SPH流体模拟中非牛顿流体粒子凝聚成团导致断层现象,提出一种针对剪切变稀型非牛顿流体的预测-校正方法.首先使用Cross模型对流体进行统一建模;然后计算每个流体粒子受到的除了压强力以外的其他力,以此获得中间速度;最后通过求解每个流体粒子的压强系数满足流体的不可压缩性,实现密度校正.为了提高计算速度,该方法使用全局动态时间步长.实验结果表明,文中方法实现了牛顿流体和剪切变稀型非牛顿流体的统一建模,解决了断层问题;相比于无校正方法,其能够在更大的时间步长下稳定运行.

关键词：基于物理的动画流体仿真非牛顿流体光滑粒子流体动力学预测-校正法