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Science China(Technological Sciences) 2009年第5期52卷 1181-1186页

作者： XIE GuoYong zhang Jin zhang yongyi zhang YingYing ZHU Tao LIU ZhongFan Center for Nanoscale Science and Technology(CNST) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Nanotechnology Industrialization Base of China Tianjin 300457China

We report herein a rational approach for fabricating metal suspending nanostructures by nanoimprint lithography(NIL) and isotropic reactive ion etching(RIE).The approach comprises three principal steps:(1) mold fabrication,(2) structure replication by NIL,and(3) suspending nanostructures creation by isotropic *** this approach,suspending nanostructures with Au,Au/Ti or Ti/Au bilayers,and Au/Ti/Au sandwiched structures are *** Au nanostructures,straight suspending nanostructures can be obtained when the thickness of Au film is up to 50 nm for nano-bridge and 90 nm for nano-finger *** the thickness of Au is below 50 nm for nano-bridge and 90 nm for nano-finger,the Au suspending nanostructures bend upward as a result of the mismatch of thermal expansion between the thin Au films and Si *** leads to residual stresses in the thin Au *** Au/Ti or Ti/Au bilayers nanostructures,the cantilevers bend toward Au film,since Au has a larger thermal expansion coefficient than that of *** in the case of sandwich structures,straight suspending nanostructures are obtained,this may be due to the balance of residual stress between the thin films.

关键词： suspending nanostructure fabrication nanoimprint lithography(NIL) isotropic reactive ion etching(RIE)

One-step wet-spinning assembly of twisting-structured graphene/carbon nanotube fiber supercapacitor

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Journal of Energy Chemistry 2020年第12期29卷 434-441页

作者： Zhengpeng Yang Yuanheng Jia Yutao Niu yongyi zhang Chunjing zhang Ping Li Meng Zhu Qingwen Li Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454003HenanChina Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiChina Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Suzhou Institute of Nano-Tech and Nano-BionicsNanchangChinese Academy of SciencesNanchang 330200JiangxiChina

Graphene fiber-based supercapacitors hold great promise as flexible energy-storage devices. However, simultaneously achieving high ion-transport ability in electrode and electrolyte layer, which is crucial for realizing the high electrochemical performance, still remains challenging. Here, a facile and effective strategy to solve the problem was proposed by developing a twisting-structured graphene/carbon nanotube(CNT) fiber supercapacitor via one-step wet-spinning process with customized multi-channel *** remarkable structure features of the resulting fiber supercapacitor with wrinkled and thin electrolyte layer, and well-developed porosity of fiber electrode favored the rapid infiltration and transport of electrolyte ions inside the electrode, as well as between electrode and electrolyte, thus boosting high specific capacitance of 187.6 mF cm^(-2) and energy density of 30.2 μWh cm^(-2), and featuring long cycling life(93%capacitance retention after 10,000 cycles) and excellent flexibility. Moreover, the specific capacitance and energy density could be further improved to 267.2 m F cm^(-2) and 66.8 μWh cm^(-2), respectively, when Mn O2 was incorporated into the fiber.

关键词： One-step wet-spinning Graphene fiber-based supercapacitor Twisting-structured fiber Ion transport

FeCo alloy catalysts promoting polysulfide conversion for advanced lithium-sulfur batteries

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Journal of Energy Chemistry 2020年第10期29卷 339-347页

作者： Hongyi Li Linfeng Fei Rong zhang Shenglan Yu yongyi zhang Longlong Shu Yong Li Yu Wang School of Materials Science and Engineering Nanchang UniversityNanchang 330031JiangxiChina Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNanchang 330200JiangxiChina College of Chemistry Biology and Material ScienceEast China University of TechnologyNanchang 330013JiangxiChina

Lithium sulfur batteries(LSBs)draw extensive interest because of the ultra-high capacity and low material ***,the sluggish lithium polysulfides(LIPSs)conversion processes are detrimental to cycle stability and rate capability,inhibiting the commercial application of *** we present the well-designed Fe Co alloy catalysts anchored on porous carbon(FeCo-C)as sulfur host to improve the electrochemical performance by accelerating the conversion *** FeCo alloy demonstrates high catalytic effect and strong adsorption capability of LIPSs,in which potential polarization can be greatly decreased and"shuttle effects"can be largely *** a result,the obtained S/Fe Co-C composites show an initial specific capacity of 791.9 m Ah g^-1 at a large current density of 2 C and maintain 502.5 mAh g^-1 even after 500 ***,720 m Ah g^-1(corresponding to 70%retention)can be achieved after 100 cycles at 0.2 C with a high sulfur content of 80 wt%,enabling high sulfur *** work not only provides a new insight to investigate the conversion kinetics of Li PSs,but also opens up a new avenue for advanced lithium sulfur batteries.

关键词： Lithium sulfur batteries FeCo alloys Catalysts Adsorption Porous carbon

ZnS nanolayer coated hollow carbon spheres with enhanced rate and cycling performance for Li-S batteries

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Science China(Technological Sciences) 2022年第2期65卷 272-281页

作者： MENG FanCheng XU Bin LONG Tao CHENG Sheng LI Yong zhang yongyi LIU JieHua School of Materials Science and Engineering Engineering Research Centre of High-Performance Copper Alloy Materials and ProcessingMinistry of EducationHefei University of TechnologyHefei 230009China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Suzhou Institute of Nano-Tech and Nano-BionicsNanchangChinese Academy of SciencesNanchang 330200China Instrumental Analysis Centre Hefei University of TechnologyHefei 230009China School of Instrument Science and Opto-electronics Engineering Hefei University of TechnologyHefei 230009China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China

Conductive carbon structure has been considered as a promising sulfur-hosting material as the cathode of lithium-sulfur ***, the issue of polysulfide shuttling requires an additional component to help restrict and convert sulfur ***, in this work, hollow and porous carbon nanospheres(HCS) are synthesized by a template method and a high-temperature carbonization treatment. A thin layer of ZnS coating is then deposited on the HCS-based sulfur(ZnS@HCS/S) cathode with controlled thickness, and the overall electrochemical properties are systematically evaluated. Results show that with 30 nm-thick ZnS coating, the cathode reveals an improved capacity of 1411 m A h g^(-1), and higher capacities from 0.2 to 3 C rate compared with bare HCS/S cathode. Moreover, the ZnS coating also enhances the cycling stability of ZnS@HCS/S cathode over 280 cycles at 0.5 C, with only 0.2% capacity decay per cycle. This work demonstrates potential applications for high-performance lithiumsulfur batteries.

关键词： lithium-sulfur battery ZnS nanolayer hollow carbon sphere rate performance cycling stability

High-loading Co-doped NiO nanosheets on carbon-welded carbon nanotube framework enabling rapid charge kinetic for enhanced supercapacitor performance

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Journal of Energy Chemistry 2020年第11期29卷 240-247页

作者： Hao Xu Yufang Cao Yong Li Pei Cao Dandan Liu yongyi zhang Qing wen Li School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiChina Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Suzhou Institute of Nano-Tech and Nano-BionicsNanchangChinese Academy of SciencesNanchang 330200JiangxiChina School of Materials Science and Engineering Nanchang UniversityNanchang 330031JiangxiChina

Developing high power and energy supercapacitors(SCs)is a long-pursued goal for the application in transportation and energy storage ***,a rationally-designed Co-doped nickel oxide nanosheets@carbon-welded carbon nanotube foam(Co-doped NiO@WCNTF)as freestanding electrode is successfully prepared for high power and energy *** WCNTF framework with high specific surface area provides three dimensional highly conductive network for fast charge transport and ensures high loading of active materials(9.2 mg/cm2).Moreover,porous Co-doped NiO nanosheets uniformly anchored on the WCNTF framework enable rapid charge kinetics due to the high intrinsic conductivity of Co-doped Ni O nanosheets and their good contact with conductive WCNTF *** a result,the unique integrated electrode with 3D architecture exhibits an ultrahigh specific capacitance of 11.45 F/cm2 at 5 mA/cm2,outstanding rate capability(11.45 F/cm2 at 5 mA/cm2 and a capacitance retention of 86.2%at 30 mA/cm2)and good cycling stability,suggesting great potential for high performance supercapacitor.

关键词： Carbon nanotube foam Pseudocapacitors Co-doped NiO nanosheets Freestanding electrode

Fast Zn^(2+)mobility enabled by sucrose modified Zn^(2+)solvation structure for dendrite-free aqueous zinc battery

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Nano Research 2023年第3期16卷 3839-3846页

作者： Yufang Cao Xiaohui Tang Linge Li Haifeng Tu Yuzhen Hu Yingying Yu Shuang Cheng Hongzhen Lin Liwen zhang Jiangtao Di yongyi zhang Meinan Liu School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200China

Aqueous zinc battery has been regarded as one of the most promising energy storage systems due to its low cost and environmental ***,the safety concern on Zn anodes caused by uncontrolled Zn dendrite growth in aqueous electrolyte hinders their ***,sucrose with multi-hydroxyl groups has been introduced into aqueous electrolyte to modify Zn^(2+)solvation environment and create a protection layer on Zn anode,thus effectively retarding the growth of zinc *** simulations and experiments confirm that sucrose molecules can enter into the solvation sheath of Zn^(2+),and the as-formed unique solvation structure enhances the mobility of Zn^(2+).Such fast Zn^(2+)kinetics in sucrose-modified electrolyte can successfully suppress the dendrite *** this sucrose-modified aqueous electrolyte,Zn/Zn symmetric cells present more stable cycle performance than those using pure aqueous electrolyte;Zn/C cells also deliver an impressive higher energy density of 129.7 Wh·kg^(−1)and improved stability,suggesting a great potential application of sucrose-modified electrolytes for future Zn batteries.

关键词： solvation structure Zn^(2+)mobility dendrite suppression sucrose

Carbon nanotube fibers with excellent mechanical and electrical properties by structural realigning and densification

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Nano Research 2023年第11期16卷 12762-12771页

作者： Kunjie Wu Bin Wang Yutao Niu Wenjing Wang Cao Wu Tao Zhou Li Chen Xianghe Zhan Ziyao Wan Shan Wang Zhengpeng Yang Yichi zhang Liwen zhang yongyi zhang Zhenzhong Yong Muqiang Jian Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454003China Beijing Graphene Institute(BGI) Beijing 100095China

Floating catalysis chemical vapor deposition(FCCVD)direct spinning process is an attractive method for fabrication of carbon nanotube fibers(CNTFs).However,the intrinsic structural defects,such as entanglement of the constituent carbon nanotubes(CNTs)and inter-tube gaps within the FCCVD CNTFs,hinder the enhancement of mechanical/electrical properties and the realization of practical applications of ***,achieving a comprehensive reassembly of CNTFs with both high alignment and dense packing is particularly ***,an efficient reinforcing strategy for FCCVD CNTFs was developed,involving chlorosulfonic acid-assisted wet stretching for CNT realigning and mechanical rolling for *** reveal the intrinsic relationship between the microstructure and the mechanical/electrical properties of CNTFs,the microstructure evolution of the CNTFs was characterized by cross-sectional scanning electron microscopy(SEM),wide angle X-ray scattering(WAXS),polarized Raman spectroscopy and Brunauer–Emmett–Teller(BET)*** results demonstrate that this strategy can improve the CNT alignment and eliminate the inter-tube voids in the CNTFs,which will lead to the decrease of mean distance between CNTs and increase of inter-tube contact area,resulting in the enhanced inter-tube van der Waals *** microstructural evolutions are beneficial to the load transfer and electron transport between CNTs,and are the main cause of the significant enhancement of mechanical and electrical properties of the ***,the tensile strength,elastic modulus and electrical conductivity of the high-performance CNTFs are 7.67 GPa,230 GPa and 4.36×10^(6)S/m,*** paves the way for further applications of CNTFs in high-end functional composites.

关键词： carbon nanotube fibers mechanical property electrical property alignment packing density

Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption

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Nano-Micro Letters 2023年第1期15卷 144-160页

作者： Cao Wu Jing Wang Xiaohang zhang Lixing Kang Xun Cao yongyi zhang Yutao Niu Yingying Yu Huili Fu Zongjie Shen Kunjie Wu Zhenzhong Yong Jingyun Zou Bin Wang Zhou Chen Zhengpeng Yang Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuPeople’s Republic of China School of Science Nanchang Institute of TechnologyNanchang 330099JiangxiPeople’s Republic of China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200JiangxiPeople’s Republic of China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiPeople’s Republic of China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou 215009People’s Republic of China School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211800People’s Republic of China Henan Key Laboratory of Materials On Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454003People’s Republic of China College of Safety Science and Engineering Xi’an University of Science and TechnologyXi’an 710054People’s Republic of China

In the present paper,a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption *** inorganic-organic competitive coating strategy was employed,which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal *** a result,Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon *** results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability,which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight *** addition,this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave *** excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized *** strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications.

关键词： Gradient structures Carbon nanospheres Electromagnetic wave absorption Impedance matching

Why Judges Don't Believe What Witnesses Say——The Role of Witnesses in the Judicial Procedure in Transitional China

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Social Sciences in China 2007年第2期 164-166页

作者： Xu Xin, Law School, the Southwest University of Political Science and Law.Chen yongyi zhang Zhiping Chen yongyi zhang Zhiping

In judicial practice in China, now in typological transition, the testimony of witnesses is far from playing the role it is supposed to. Factors constraining witnesses’and judges’ behavior might be summarized

关键词： Why Judges Don’t Believe What Witnesses Say The Role of Witnesses in the Judicial Procedure in Transitional China

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《药地炮庄·序跋发凡》注释

现代哲学 2010年第4期 114-123页

作者：张永义中山大学哲学系

方以智的代表作《药地炮庄》素称难读。出于其师友及弟子之手的序、跋和发凡,倒是为阅读和理解提供了不少的线索。文章即是对全部16篇文字(含方以智本人一篇)的标点和注解。有关成书时间、著述风格、学术宗旨及师承渊源等问题,题解和注... 详细信息

方以智的代表作《药地炮庄》素称难读。出于其师友及弟子之手的序、跋和发凡,倒是为阅读和理解提供了不少的线索。文章即是对全部16篇文字(含方以智本人一篇)的标点和注解。有关成书时间、著述风格、学术宗旨及师承渊源等问题,题解和注文中皆略有考辨。

关键词：药地炮庄方以智道盛托孤说