文献类型：期刊文献

英文题名：A Ca-Ion Electrochromic Battery via a Water-in-Salt Electrolyte

作者：Tong, Zhongqiu Kang, Tianxing Wan, Yingpeng Yang, Rui Wu, Yan Shen, Dong Liu, Shihao Tang, Yongbing Lee, Chun-Sing

第一作者：Tong, Zhongqiu

通信作者：Lee, CS[1]

机构：[1]City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Dept Chem, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China;[2]Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang, Peoples R China;[3]Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China

第一机构：City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Dept Chem, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

通信机构：corresponding author), City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Dept Chem, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China.

年份：2021

卷号：31

期号：41

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20212910648000);Scopus(收录号：2-s2.0-85110066466);WOS:【SCI-EXPANDED(收录号:WOS:000673514100001)】；

基金：This work was supported by the NSFC/RGC Joint Research Scheme 2020/21 (Project No: N_CityU104/20) and the Science and Technology Foundation of Guizhou Province of China (No. qianke he ji chu [2017] 1065)

语种：英文

外文关键词：aqueous batteries; Ca-ion redox; electrochromic batteries; multivalent-ion charge carrier; water-in-salt electrolytes

摘要：Multivalent-ion batteries with electrochromic functionality are an emerging green technology for development of low-carbon society. Compared to Mg2+, Zn2+ and Al3+, Ca2+ has a low polarization strength similar to that of Li+, therefore Ca2+ for electrochromism and battery can avoid kinetic issues caused by other multivalent-ions with high polarization strength. Here, by exploiting Ca-ion carriers for electrochromism and a water-in-salt (WIS) Ca(OTF)(2) electrolyte for the first time, a new and safe aqueous Ca-ion electrochromic battery (CIEB) has been demonstrated. The WIS Ca(OTF)(2) electrolyte demonstrates enhanced anion-cation interactions and decreased water activity. Vanadium oxide (VOx) and indium hexacyanoferrate (InHCF) films are respectively developed as anode and cathode because of their stable and high-rate Ca2+ insertion/extraction, as well as matched electrochromism. The CIEB demonstrates a stable and high-rate capability, a high energy density of 51.4 mWh m(-2) at a power density of 1737.3 mW m(-2), and a greenish yellow-to-black electrochromism. The presented results are beneficial for understanding redox kinetics in WIS electrolytes, and inspire researches on batteries and electrochromism with multivalent-ions.