SnO_(2)/metal organic complex composite derived from low-temperature activated metal organic complex for advanced lithium storage  

作　　者：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 

机构地区：[1]Luoyang Key Laboratory of Green Energy Materials,College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471934,China [2]School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China [3]Inner Mongolia Shijie Chemical Co.,Ltd.Alxa League 737300

出　　处：《Rare Metals》2024年第7期3032-3043,共12页稀有金属（英文版）

基　　金：financially supported by the Program for Science&Technology Innovation Talents in Universities of Henan Province(No.24HASTIT006);the Natural Science Foundations of China(No.42002040);Natural Science Foundations of Henan Province(No.222300420502);Key Science and Technology Program of Henan Province(No.222102240044);Key Scientific Research Projects in Colleges and Universities of Henan Province(No.21B610010)。

摘　　要：Sn-based metal organic complexes with coordination bonds,multi-active sites,and high theoretical capacity have attracted much attention as promising anodes for lithium ion batteries.However,the low electrical conductivity and huge volume changes restricted their electrochemical stability and practical utilization.Herein,Snbased 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 SnO_(2),generating highly dispersed SnO_(2) 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 SnO_(2) during lithiation and delithiation,which enhances the electrical conductivity and induces a strong pseudo-capacitive behavior,accelerating the electrochemical kinetics;the multiple solid electrolyte interface with inflexible LiF and flexible ROCO_(2)Li buffers the volume variation of the electrode,resulting in its high electrochemical stability.This work provides a simple strategy for preparing excellent Sn-based anodes from metal organic complexes and reveals the lithium storage mechanism of the prepared Snbased anode.

关 键 词：Metal organic complex Lithium ion battery Electrochemical activation Low-temperature activation Partial decomposition 

分 类 号：TB33[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]