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Electrolyte Solvation Manipulation Enables Unprecedented Room‐Temperature Calcium‐Metal Batteries
Author(s) -
Jie Yulin,
Tan Yunshu,
Li Linmei,
Han Yehu,
Xu Shutao,
Zhao Zhenchao,
Cao Ruiguo,
Ren Xiaodi,
Huang Fanyang,
Lei Zhanwu,
Tao Guohua,
Zhang Genqiang,
Jiao Shuhong
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202002274
Subject(s) - electrolyte , faraday efficiency , anode , solvation , calcium , stripping (fiber) , lithium (medication) , lithium metal , plating (geology) , metal , materials science , chemistry , energy storage , electrochemistry , inorganic chemistry , chemical engineering , ion , electrode , metallurgy , composite material , thermodynamics , medicine , power (physics) , physics , organic chemistry , geophysics , geology , engineering , endocrinology
Calcium‐metal batteries (CMBs) provide a promising option for high‐energy and cost‐effective energy‐storage technology beyond the current state‐of‐the‐art lithium‐ion batteries. Nevertheless, the development of room‐temperature CMBs is significantly impeded by the poor reversibility and short lifespan of the calcium‐metal anode. A solvation manipulation strategy is reported to improve the plating/stripping reversibility of calcium‐metal anodes by enhancing the desolvation kinetics of calcium ions in the electrolyte. The introduction of lithium salt changes the electrolyte structure considerably by reducing coordination number of calcium ions in the first solvation shell. As a result, an unprecedented Coulombic efficiency of up to 99.1 % is achieved for galvanostatic plating/stripping of the calcium‐metal anode, accompanied by a very stable long‐term cycling performance over 200 cycles at room temperature. This work may open up new opportunities for development of practical CMBs.