In-situ imaging electrocatalysis in a solid-state Li-O2 battery with CuSe nanosheets as air cathode

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外文摘要：The development of highly efficient catalysts in the cathodes of rechargeable Li-O2 batteries is a consider-able challenge.To enhance the electrochemical performance of the Li-O2 battery,it is essential to choose a suitable catalyst material.Copper selenide(CuSe)is considered as a more promising cathode catalyst material for Li-O2 battery due to its better conductivity and rich electrochemical active sites.However,its electrochemical reaction and fundamental catalytic mechanism remain unclear till now.Herein,in-situ environmental transmission electron microscopy technique was used to study the catalysis mechanism of the CuSe nanosheets in Li-O2 batteries during discharge and charge processes.It is found that Li2O was formed and decomposed around the ultrafine-grained Cu during the discharge and charge processes,respectively,demonstrating excellent cycling.This indicate that the freshly formed ultrafine-grained Cu in the conversion reaction catalyzed the latter four-electron-transfer oxygen reduction reaction,leading to the formation of Li2O.Our study provides important understanding of the electrochemistry of the Li-O2 nanobatteries,which will aid the development of high-performance Li-O2 batteries for energy storage applications.

外文关键词：

In-situ environmental transmission electronmicroscopyLithium oxygen batteriesCuSe nanosheetsOxygen reduction reactionOxygen evolution reaction

作者：

Peng Jia、Yunna Guo、Dongliang Chen、Xuedong Zhang、Jingming Yao、Jianguo Lu、Liqiang Zhang

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作者单位：

Hebei Key Laboratory of Applied Chemistry,College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China

Clean Nano Energy Center,State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China

State Key Laboratory of Silicon and Advanced Semiconductor Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310058,China

Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China

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基金：

国家自然科学基金国家自然科学基金河北省自然科学基金中国博士后科学基金

项目编号：

5202208851971245F20212030972021M702756

出版年：

2024

DOI：

10.1016/j.cclet.2023.108624

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(5)

参考文献量57