A low-cost separator enables a highly stable zinc anode by accelerating the de-solvation effect

被引:58
作者
Cao, Jin [1 ]
Zhang, Dongdong [2 ]
Chanajaree, Rungroj [3 ]
Luo, Ding [4 ]
Yang, Xuelin [1 ,4 ]
Zhang, Xinyu [1 ,5 ]
Qin, Jiaqian [1 ,3 ,6 ]
机构
[1] China Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Hubei, Peoples R China
[2] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
[3] Chulalongkorn Univ, Met & Mat Sci Res Inst, Bangkok 10330, Thailand
[4] China Three Gorges Univ, Coll Elect Engn & New Energy, Hubei Prov Collaborat Innovat Ctr New Energy Micro, Yichang 443002, Hubei, Peoples R China
[5] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[6] Chulalongkorn Univ, Ctr Excellence Adv Mat Energy Storage, Bangkok 10330, Thailand
基金
中国国家自然科学基金;
关键词
Zinc-ion batteries; Dendrites growth; Side reactions; Separator; Dendrites-free; ZN;
D O I
10.1016/j.cej.2023.147980
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Aqueous zinc-ion batteries (ZIBs) are promising as the next-generation energy storage system due to their inherent safety and low cost, but challenges relating to H2O-induced side reactions and dendrite growth of the zinc anode are restricting its practical application. Herein, a low-cost separator (CNF + LMS) composed of cellulose nanofibers (CNF) and lithium magnesium silicate (LMS) has been prepared to eliminate the obstacles through accelerating the de-solvation process and facilitating the homogeneous zinc deposition. As verified by the experimental results and theoretical calculations, the battery with CNF + LMS separator shows a lower de-solvation activation energy (44.13 kJ mol-1) and faster de-solvation kinetics due to the superior water adsorption capacity of LMS molecules. Additionally, the CNF + LMS separator also presents superior wettability, large tensile strength, and excellent ionic conductivity, thus enabling dendrite-free zinc deposition, long cycling life (1000 h at 1 mA cm-2; 500 h at 5 mA cm-2), superior Coulombic efficiency (99.12 % at 1 mA cm-2). The CNF + LMS separator, which cost as low as yen 6.36 per m2, can also be utilized in Zn||VO2 full battery and pouch cell to boost their electrochemical performance. Considering the facile preparation, low cost and practical feasibility, the CNF + LMS separator offers a new opportunity for developing practical ZIBs.
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页数:9
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