Electrochemical reconstruction:a new perspective on Sn metal-organic complex microbelts as robust anode for lithium storage

Jin-Ke Shen ¹Nai-Teng Wu ²Li-Yuan Wang ²Gang Jiang ²Dong-Lei Guo ²Jin Li ²Gui-Long Liu ²Hong-Yu Mi ³Huan Pang ⁴Xian-Ming Liu²

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作者信息

1. Key Laboratory of Function-oriented Porous Materials of Henan Province,College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China;State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,School of Chemical Engineering and Technology,Xinjiang University,Urumqi 830046,China
2. State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,School of Chemical Engineering and Technology,Xinjiang University,Urumqi 830046,China
3. Key Laboratory of Function-oriented Porous Materials of Henan Province,College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China
4. School of Chemistry and Chemical Engineering,Institute for Innovative Materials and Energy,Yangzhou University,Yangzhou 225009,Jiangsu,China
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Abstract

Tin-based materials with high theoretical capacity and suitable working voltage are ideal anode materials for lithium-ion batteries(LIBs).However,to overcome their shortcomings(volume expansion and inferior stability),the preparation processes are usually complicated and expensive.Herein,a tin-based metal-or-ganic complex(tin 1,2-benzenedicarboxylic acid,Sn-BDC)with one-dimensional microbelt morphology is synthesized by a facile,rapid and low-cost co-precipitation method,and served as anode material for LIBs without any post-treat-ment.Sn-BDC exhibits a high reversible capacity with 609/440 mAh·g-1 at 50/2000 mA·g-1,and robust cycling stability of 856 mAh·g-1 after 200 cycles at 200 mA·g-1,which are obviously superior to that of the SnOx/C coun-terparts.Moreover,an electrochemical reconstruction per-spective on the lithium storage mechanism of Sn-BDC is proposed by systematic ex-situ characterizations.The reconstructed SnO2 replaces Sn-BDC and becomes the active material in the subsequent cycles.As the by-product of the lithiation reaction,the formed Li-based metal-or-ganic complex(Li-BDC,wrapped around the reconstructed SnO2)plays an important role in alleviating volume expansion and accelerating the charge transfer kinetics.This work is beneficial to design and construct the new electrode materials based on the electrochemical recon-struction for advanced LIBs.

Key words

Electrochemical reconstruction/Metal-organic complex/Anode/Lithium storage mechanism/Lithium-ion batteries

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基金项目

National Natural Science Foundations of China(51904152)

National Natural Science Foundations of China(21965033)

National Natural Science Foundations of China(U2003216)

Natural Science Foundations of Henan Province(222300420502)

Program for Science & Technology Innovation Talents in Universities of Henan Province(20HASTIT020)

Key Science and Technology Program of Henan Province(222102240044)

出版年

2024

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

参考文献量66

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