Dealloying-induced dual-scale nanoporous indium-antimony anode for sodium/potassium ion batteries

作     者：Hui Gao Yan Wang Zhiyuan Guo Bin Yu Guanhua Cheng Wanfeng Yang Zhonghua Zhang Hui Gao;Yan Wang;Zhiyuan Guo;Bin Yu;Guanhua Cheng;Wanfeng Yang;Zhonghua Zhang

作者机构：Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education)School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina School of Materials Science and EngineeringUniversity of JinanJinan 250022ShandongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第75卷第12期

页      面：154-163,I0005页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：financial support by the National Natural Science Foundation of China(51871133) the Taishan Scholar Foundation of Shandong Province,the Key Research and Development Program of Shandong Province(2021ZLGX01) the program of Jinan Science and Technology Bureau(2019GXRC001)。 

主　　题：Sodium/potassium ion battery Indium-antimony anode Dealloying Operando X-ray diffraction On-line mass spectrometry 

摘      要：InSb alloy is a promising candidate for sodium/potassium ion batteries(SIBs/PIBs)but challenged with achieving high performance by dramatic volumetric changes.Herein,nanoporous(np)-InSb with dualscale phases(cubic/hexagonal(C/H)-InSb)was fabricated by chemical dealloying of ternary Mg-In-Sb precursor.Operando X-ray diffraction(XRD)and ex-situ characterizations well rationalize the dealloying/alloying mechanisms and the formation of dual-scale microstructures/phases.As an anode for SIB/PIBs,the np-InSb electrode exhibits superior reversible capacities and lifespan compared with the monometallic porous(p)-In electrode,stemming from the dealloying-induced dual-scale nanoporous architecture and alloying strategy with proper composition.The operando XRD results demonstrate that the(de)sodiated mechanism of the np-InSb electrode involves a two-step(de)alloying process,while the(de)potassiated mechanism is associated with a full electrochemically-driven amorphization upon cycling.Additionally,the gas evolution during the(dis)charge process was monitored by on-line mass spectrometry.