Coupling Ternary Selenide SnSb_(2)Se_(4) with Graphene Nanosheets for High-Performance Potassium-Ion Batteries

作     者：Ruiqi Tian Liping Duan Yifan Xu Yuehua Man Jianlu Sun Jianchun Bao Xiaosi Zhou Ruiqi Tian;Liping Duan;Yifan Xu;Yuehua Man;Jianlu Sun;Jianchun Bao;Xiaosi Zhou

作者机构：School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第4期

页      面：280-288页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(22075147 and 22179063) 

主　　题：anode ex situ XRD potassium-ion battery SnSb_(2)Se_(4) synergistic effect 

摘      要：Although chalcogenide anodes possess higher potassium storage capacity than intercalated-based graphite,their drastic volume change and the irreversible electrochemical reactions still hinder the effective electron/ion transfer during the potassiation/depotassiation *** solve the above problems,this article proposes the synthesis of a lamellar nanostructure where graphene nanosheets are embedded with SnSb_(2)Se_(4)nanoparticles(SnSb_(2)Se_(4)/GNS).In the product,fine monodisperse SnSb_(2)Se_(4)nanoparticles are coupled with graphene nanosheets to form a porous network framework,which can effectively mitigate the drastic volume changes during electrode reactions and guarantee efficient potassium-ion storage through the synergistic interactions among multiple *** electrochemical analyses prove that SnSb_(2)Se_(4)inherits the advantages of the binary Sb2Se3 and SnSe while avoiding their disadvantages,confirming the synergistic effect of the ternary–chalcogenide *** tested for potassium storage,the obtained composite delivers a high specific capacity of 368.5 mAh g^(-1)at 100 mA g^(-1)and a stable cycle performance of 265.8 mAh g^(-1)at 500 mA g^(-1)over 500 ***,the potassium iron hexacyanoferrate cathode and the SnSb_(2)Se_(4)/GNS anode are paired to fabricate the potassium-ion full cell,which shows excellent cyclic *** conclusion,this strategy employs atomic doping and interface interaction,which provides new insights for the design of high-rate electrode materials.