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Multi-electron reaction concept for the universal battery design

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Journal of Energy Chemistry 2020年第12期29卷 416-417页

作者： Feng Wu Haoyi Yang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Electrochemical batteries define the contraption stores electricity in the direct form of chemical energy with high efficiency. If the energy conversion process can be reversed, namely the input and output of electricity both being permitted, the batteries are termed rechargeable batteries or also secondary batteries accordingly [1]. These decades have witnessed the rapid development of batteries because of the demands for transportation of information and mass in the mobile area, and stationary storage for the implementation of renewable energy technologies.

关键词： Multi-electron reaction electrode material Redox chemistry

Imidazole-Linked Fully Conjugated Covalent Organic Framework for High-Performance Sodium-Ion Battery

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CCS Chemistry 2024年第5期6卷 1255-1263页

作者： Lu Liu Yu Gong Yifan Tong Hao Tian Xubo Wang Yiming Hu Shaofeng Huang Weiwei Huang Sandeep Sharma Jingnan Cui Yinghua Jin Weitao Gong Wei Zhang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024 Department of Chemistry University of Colorado BoulderBoulderColorado 80309 Hebei Key Laboratory of Applied Chemistry Yanshan UniversityQinhuangdao 066004

Covalent organic frameworks(COFs)have garnered increasing attention as promising electrode materials for sodium-ion batteries(SIBs)due to their ordered backbones,uniform pore sizes,and high surface ***,they also face challenges,including low capacity,unsatisfactory rate performance,and limited cycling stability,which pose the primary obstacles to their practical ***,a pyrenoimidazole-based COF,denoted as PyIm-COF,has been synthesized as a novel electrode material for highperformance SIBs using an efficient synthetic *** extended fully conjugated backbones and readily accessible redox-active sites,PyIm-COF demonstrates remarkable high-rate performance,delivering around 250 m Ah g^(−1)and excellent cycling stability,retaining 97.2%of its capacity even after 2500 cycles at 5 A g^(−1),which is higher than that of most previously reported COF-based *** work provides valuable insights into the development of nitrogen-rich conjugated COF electrode materials for rechargeable SIBs.

关键词： pyrenoimidazole fully conjugated backbones covalent organic framework electrode material sodium-ion battery

Improving Electrochemical Performance of Cellulose Fiber-based Supercapacitor electrode Using Polypyrrole-wrapped Iron Oxyhydroxide

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Paper And Biomaterials 2021年第3期6卷 10-19页

作者： Youngchu Kang Hailan Jin Xianhui An Xueren Qian Key Laboratory of Bio-based material Science&Technology(Northeast Forestry University)Ministry of Education HarbinHeilongjiang Province150040China

Polypyrrole(PPy)@cellulose fiber-based composites have been widely investigated as electrode materials for use in flexible ***,they cannot readily provide high specific capacitance and cyclic stability owing to their inherent drawbacks,such as high resistance,Weber impedance,and volume expansion or collapse during charging/*** this study,iron oxyhydroxide(FeOOH)is incorporated in the abovementioned composite to decrease the equivalent series resistance,charge transfer resistance,and Weber impedance,thereby enhancing electron transfer and ion diffusion,which results in superior electrochemical *** PPy-wrapped FeOOH@cellulose fiber-based composite electrode with the molar ratio of FeSO_(4) to NaBH4 of 1∶1 exhibits a high specific capacitance of 513.8 F/g at a current density of 0.2 A/g,as well as an excellent capacitance retention of 89.4% after 1000 cycles.

关键词： cellulose fibers iron oxyhydroxide polypyrrole electrode material electrochemical performance

Effect of Packaging material on Piezoelectric Response of Sensor with Electrospinning Polyvinylidene Fluoride (PVDF) Nanofiber Web

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Journal of Donghua University(English Edition) 2017年第1期34卷 95-98页

作者：顾苑园胡吉永朱胤达熊巧叶 College of Textiles Donghua University Shanghai 201620 China Key Lab of Textile Science & Technology Ministry of Education Donghua University Shanghai 201620 China

The polyvinylidene fluoride(PVDF)nanofiber web by electrospinning technology has the characteristics of fast response,high sensitivity,wide range of pressure,etc.,and provides new sensitive materials for the sensor testing the dynamic pressure such as foot pressure during *** of the nanofiber mesh structure,it must be packaged to collect piezoelectric charge and bear strong mechanical behavior before industrial *** PVDF nanofiber web is usually packaged by incorporating a pair of flexible electrode as well as the lead of signal *** present work will introduce the detailed packaging process and technology of PVDF nanofiber web,and three different types of packaging electrode materials(adhesive copper foil tape,indium tin oxide(ITO)thin plate,and adhesive conductive cloth)in previously published literatures are compared by the piezoelectric response of their sensor prototypes to a periodic mechanical *** results showed that the surface property of packaging material had a significant effect on the piezoelectric response of sensor by PVDF nanofiber *** PVDF nanofiber web sensor,therefore,it needed a deep investigation on the specific packaging technology in terms of different working conditions.

关键词： polyvinylidene fluoride(PVDF) nanofiber mesh piezoelectric packaging electrode material

Ni(OH)_2 nanoflakes supported on 3D hierarchically nanoporous gold/Ni foam as superior electrodes for supercapacitors

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Science China materials 2018年第3期61卷 353-362页

作者：柯曦张邹鑫程乙峰梁耀华谭植元刘军刘丽英施志聪郭再萍 Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and Energy Guangdong University of TechnologyGuangzhou Higher Education Mega Center Institute for Superconducting and Electronic materials School of Mechanical Materials and Mechatronics Engineering University of Wollongong

The increasing demand for portable electronic devices and hybrid electric vehicles stimulates the develop- ment of supercapacitors as an advanced energy storage system. Here, we demonstrate a binder-free nickel hydroxide@nano- porous gold/Ni foam （Ni（OH）2@NPG/Ni foam） electrode for high-performance supercapacitors, which is prepared by a facile three-step fabrication route including electrodeposition of Au-Sn alloy on Ni foam, chemical dealloying of Sn and electrodepostion of Ni（OH）2 on NPG/Ni foam. Such Ni（OH）2@NPG/Ni foam electrode is composed of a thin layer of conformable Ni（OH）2 nanoflakes supported on three-di- mensional （3D） hierarchically porous NPG/Ni foam substrate. The resulting Ni（OH）2@NPG/Ni foam electrode can offer highways for both electron transfer and ion transport and lead to an excellent electrochemical performance with an ultrahigh specific capacitance of 3,380 F g-1 at a current density of 2 A g-1. Even when the current density was increased to 50 A g-1, it still retained a high capacitance of 1,927 F g-1. The promising performance of the Ni（OH）2@NPG/Ni foam elec- trode is mainly ascribed to the 3D hierarchical porosity and the highly conductive network on the NPG/Ni foam composite current collector, as well as the conformal electrodeposition of Ni（OH）2 active material on the NPG/Ni foam, which induces the formation of interconnected porosity both on the top surface and on the inner surface of the electrode. This in- spiring electrochemical performance would make the as-de- signed electrode material become one of the most promising candidates for future electrochemical energy storage systems.

关键词： supercapacitor nanoporous gold nickel hydroxide electrode material hierarchical porosity.

Iron-induced 3D nanoporous iron-cobalt oxyhydroxide on carbon cloth as a highly efficient electrode for oxygen evolution reaction

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Chinese Journal of Catalysis 2019年第10期40卷 1540-1547页

作者： Guodong Chen Jian Du Xilong Wang Xiaoyue Shi Zonghua Wang Han-Pu Liang College of Chemistry and Chemical Engineering Shandong Sino-Japanese Center for Collaborative Research of Carbon NanomaterialsQingdao UniversityQingdao 266071ShandongChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101Shandong China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The development of highly efficient and cost-effective electrode materials for catalyzing the oxygen evolution reaction(OER)is crucial for water splitting *** increase in the number of active sites by tuning the morphology and structure and the enhancement of the reactivity of active sites by the incorporation of other components are the two main strategies for the enhancement of their catalytic *** this study,by combining these two strategies,a unique three-dimensional nanoporous Fe-Co oxyhydroxide layer coated on the carbon cloth(3D-FeCoOOH/CC)was successfully synthesized by in situ electro-oxidation methods,and directly used as a working *** electrode,3D-FeCoOOH/CC,was obtained by the Fe doping process in(NH4)2Fe(SO4)2,followed by continuous in situ electro-oxidization in alkaline medium of“micro go chess piece”arrays on the carbon cloth(MCPAs/CC).Micro characterizations illustrated that the go pieces of MCPAs/CC were completely converted into a thin conformal coating on the carbon cloth *** electrochemical test results showed that the as-synthesized 3D-FeCoOOH/CC exhibited enhanced activity for OER with a low overpotential of 259 mV,at a current density of 10 mA cm^–2,and a small Tafel slope of 34.9 mV dec^–1,as well as superior stability in 1.0 mol L^–1 KOH *** extensive analysis revealed that the improved electrochemical surface area,conductivity,Fe-Co bimetallic composition,and the unique 3D porous structure together contributed to the enhanced OER activity of 3D-FeCoOOH/***,the synthetic strategy applied in this study could be extended to fabricate a series of Co-based electrode materials with the dopant of other transition elements.

关键词： 3D nanoporous iron-cobalt oxyhydroxide layer Micro go chess piece arrays electrode material Electro-oxidation Oxygen evolution reaction

Hydrothermal Synthesis of Molybdenum Disulfide for Lithium Ion Battery Applications

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Chinese Journal of Chemical Engineering 2010年第6期18卷 910-913页

作者： WANG Shiquan LI Guohua DU Guodong JIANG Xueya FENG Chuanqi GUO Zaiping KIM Seung-Joo Institue of NT-IT Fusion Technology Ajou University Suwon 443-749 Korea Department of Chemistry Hubei University Wuhan 430062 China State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technol-ogy Hangzhou 310032 China Institute for Superconducting and Electronic materials University of Wollongong Northfield Avenue Wollon-gong NSW 2522 Australia Division of Energy Systems Research Ajou University Suwon 443-749 Korea

Molybdenum disulfide nanoflakes were synthesized by a simple hydrothermal process using sodium molybdate and thiourea as reactants at a relatively low temperature. X-ray diffraction(XRD) and transmission elec-tron microscopy(TEM) indicate that the samples have the structure of 2H-MoS2 and the morphology of nanoflakes with the average thickness around 5-10 nm. The results of electrochemical properties indicate that the morphology and size of MoS2 particles have effects on their capacity when they are used as the anode for lithium ion battery. The as-prepared MoS2 samples have high reversible discharge capacity up to 994.6 mA·h·g-1 for the MoS2-1 elec-trode and 930.1 mA·h·g-1 for the MoS2-2 electrode and show excellent cycling performances. The MoS2-1 electrode has a better cycling stability than the MoS2-2 electrode due to their difference in the uniformity of the samples.

关键词： molybdenum disulfide chemical synthesis electrochemical property electrode material

Development of High Efficient Composite Anodes

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Rare Metals 1999年第1期18卷 7-11页

作者：黄松涛董俊卿胡永海何芬沈昌察史玉春冯堂 Gen Res Inst NonFerrous Met Beijing 100088 Peoples R China Zhangjiakou Cell Factory Zhangjiakou Zhangjiakou 075000 Peoples R China

A new type of high efficient Ti composite anodes for electrodeposition of MnO 2 was successfully developed and was widely satisfied with production in many factories in China. The process parameters of electrolysis i... 详细信息

关键词： Ti Mn composite anode Electrolytic manganese dioxide electrode material

Ultrathin free-standing electrospun carbon nanofibers web as the electrode of the vanadium flow batteries

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Journal of Energy Chemistry 2017年第4期26卷 730-737页

作者： Chi Xu Xiaofei Yang Xianfeng Li Tao Liu Huamin Zhang Division of Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Collaborative Innovation Center of Chemistry for Energy materials(iChEM) Dalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100039China

Ultrathin free-standing electrospun carbon nanofiber web（ECNFW） used for the electrodes of the vanadium flow battery（VFB） has been fabricated by the electrospinning technique followed by the carbonization process in this study to reduce the ohmic polarization of the VFB. The microstructure, surface chemistry and electrochemical performance of ECNFW carbonized at various temperatures from 800 to 1400 °C have been investigated. The results show that ECNFW carbonized at 1100 °C exhibits the highest electrocatalytic activity toward the V;/V;redox reaction, and its electrocatalytic activity decreases along with the increase of carbonization temperature due to the drooping of the surface functional *** for the VO;/VO;redox couple, the electrocatalytic activity of ECNFW carbonized above 1100 °C barely changes as the carbonization temperature rises. It indicates that the surface functional groups could function as the reaction sites for the V;/V;redox couple, but have not any catalytic effect for the VO;/VO;redox couple. And the single cell test result suggests that ECNFW carbonized at 1100 °C is a promising material as the VFB electrode and the VFB with ECNFW electrodes obtains a super low internal resistance of 250 mΩ cm;.

关键词： Vanadium flow battery electrode material Carbon nanofiber Electrospinning