首页|SnO2/metal organic complex composite derived from low-temperature activated metal organic complex for advanced lithium storage

SnO2/metal organic complex composite derived from low-temperature activated metal organic complex for advanced lithium storage

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Sn-based metal organic complexes with coor-dination bonds,multi-active sites,and high theoretical capacity have attracted much attention as promising anodes for lithium ion batteries.However,the low electrical con-ductivity and huge volume changes restricted their elec-trochemical stability and practical utilization.Herein,Sn-based anode with superior electrochemical performance,including a high reversible capacity of 1050.1 mAh·g-1 at 2 A·g-1 and a stable capacity of 1105.5 mAh·g-1 after 500 cycles at 1 A·g-1,was fabricated via a low-temperature calcination strategy from Sn metal organic complexes.The low-temperature calcination process regulates Sn-O bond and prevents the agglomeration of SnO2,generating highly dispersed SnO2 decorated metal organic complexes and providing sufficient active sites for ion storage.Ex situ characterizations expound that the undecomposed Sn-based metal organic complexes could be transformed into SnO2 during lithiation and delithiation,which enhances the electrical conductivity and induces a strong pseudo-ca-pacitive behavior,accelerating the electrochemical kinet-ics;the multiple solid electrolyte interface with inflexible LiF and flexible ROCO2Li buffers the volume variation of the electrode,resulting in its high electrochemical stability.This work provides a simple strategy for preparing excel-lent Sn-based anodes from metal organic complexes and reveals the lithium storage mechanism of the prepared Sn-based anode.

Metal organic complexLithium ion batteryElectrochemical activationLow-temperature activationPartial decomposition

Gui-Long Liu、Zi-Han Zhao、Jin-Ke Shen、Zi-Bo Zhao、Nai-Teng Wu、Dong-Lei Guo、Wei-Wei Yuan、Yong Liu、Ye-Hua Su、Xian-Ming Liu

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Luoyang Key Laboratory of Green Energy Materials,College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China

School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China

Inner Mongolia Shijie Chemical Co.,Ltd.,Alxa League 737300,China

Program for Science & Technology Innovation Talents in Universities of Henan ProvinceNatural Science Foundations of ChinaNatural Science Foundations of Henan ProvinceKey Science and Technology Program of Henan ProvinceKey Scientific Research Projects in Colleges and Universities of Henan Province

24HASTIT0064200204022230042050222210224004421B610010

2024

10.1007/s12598-024-02656-2

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(7)
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