Integration of urchin-like MnCo2O4@C core-shell nanowire arrays within porous copper current collector for superior performance Li-ion battery anodes

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外文摘要：Spinel MnCo2O4 is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox couples.However,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical applications.To overcome the inferiorities,urchin-like MnCo2O4@C core-shell nanowire arrays have been fab-ricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization process.In a typical nano-wire,the core is composed of interconnected MnCo2O4 nanoparticles and the shell shows as a thin amorphous carbon layer.The integrated MnCo2O4@C/Cu structure could act as working anodes without using additives or polymer binders.While MnCo2O4@C/Cu possesses slightly longer Li-ion insertion/desertion pathway than that of MnCo2O4/Cu,the carbon shell could effectively prevent the pulverization of MnCo2O4 and lower down charge transfer resistance and actively participate in Li-ion cycles.The rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase films.As a result,the MnCo2O4@C/Cu electrode presents superior rate capacity(600 mAh·g-1 at 1 A·g-1)and better stability(797 mAh·g-1 after 200 cycles at 100 mA·g-1).The excellent reversible Li ion storage capacity,cycling stability and rate capacity endow MnCo2O4@C/Cu great potential as stable and high output integrated anode materials in Li-ion batteries.

外文关键词：

MnCo2O4@CUrchin-like nanowire arraysCore-shellIntegrated anode materialsLithium-ion batteries

作者：

Xue-Ru Zhang、Qiong Wu、Yong Zhang、Xi-Fei Li、Ting Xie、Yu-Cheng Wu

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作者单位：

Instrumental Analysis Center,Hefei University of Technology,Hefei 230009,China

Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei 230009,China

School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China

Institute of Advanced Electrochemical Energy,Xi'an University of Technology,Xi'an 710048,China

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基金：

国家自然科学基金Science and Technology Major Project of Anhui Province111 Project New Materials and Technology for Clean Energy中央高校基本科研业务费专项中央高校基本科研业务费专项Enterprise Entrusted Project

项目编号：

52072106202003a05020007B18018JZ2019HGBZ0134PA2019GDZC0096W2021JSKF0868

出版年：

2024

DOI：

10.1007/s12598-023-02383-0

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

年,卷(期)：2024.43(2)

参考文献量75