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

查看全文 作　　者：Hui [1]Gao;Yan [2]Wang;Zhiyuan [1]Guo;Bin [1]Yu;Guanhua [1]Cheng;Wanfeng [1]Yang;Zhonghua [1]Zhang 高影响力作者 机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),School of Materials Science and Engineering,Shandong University,Jinan 250061,Shandong,China;[2]School of Materials Science and Engineering,University of Jinan,Jinan 250022,Shandong,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2022年第12期,共11页高影响力期刊 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)。 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. 关 键 词：Sodium/potassium ion battery Indium-antimony anode DEALLOYING Operando X-ray diffraction On-line mass spectrometry
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