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标题: Cu7Te4 as an Anode Material and Zn Dendrite Inhibitor for Aqueous Zn-Ion Battery

作者: Li, W (Li, Wei); Ma, YS (Ma, Yongsong); Shi, H (Shi, Hao); Jiang, K (Jiang, Kai); Wang, DH (Wang, Dihua)

来源出版物: ADVANCED FUNCTIONAL MATERIALS 文献号: 2205602 DOI: 10.1002/adfm.202205602 提前访问日期: JUL 2022

摘要: Zn metal is a promising anode material for high-energy-density aqueous batteries, but it is plagued by dendrite, low stripping/plating efficiency, and inevitable depletion of active Zn. Herein, a low-intercalation-potential material, Cu7Te4, is reported as both an anode material and Zn dendrite inhibitor for aqueous Zn batteries. A low plateau of 0.2 V (vs Zn2+/Zn), high capacity of 216 mA h g(-1), and superior cyclability over 4200 cycles can be realized by Cu7Te4 anode. Moreover, when Zn is modified with Cu7Te4 layer, a hybrid anode based on "intercalation-deposition" mechanism can be ingeniously developed, in which Zn2+ ions are sequentially inserted into Cu7Te4 and uniformly deposed on Zn at successive low potential. A battery built on such a mechanism sustains more than 1000 h and 1000 times in comparison to less than 100 h and 350 times of a bare Zn. Furthermore, an aqueous "rocking-chair" Cu7Te4//ZnI2 Zn-ion full battery is further demonstrated, which can realize energy densities of 65.3 Wh kg(-1) and 86% capacity retentions after 10 000 cycles. This research contributes to a stable anode material for aqueous Zn batteries and provides an effective strategy to address the Zn dendrite.

作者关键词: Aqueous Zn batteries; Cu; Te-7; (4); dendrite inhibitors; full batteries; intercalated anodes

地址: [Li, Wei; Ma, Yongsong; Shi, Hao; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Int Sci & Technol Cooperat Base Sustainable Resou, Wuhan 430072, Hubei, Peoples R China.

[Jiang, Kai] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn, Wuhan 430074, Peoples R China.

通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Int Sci & Technol Cooperat Base Sustainable Resou, Wuhan 430072, Hubei, Peoples R China.

Jiang, K (通讯作者)，Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn, Wuhan 430074, Peoples R China.

电子邮件地址: kjiang@hust.edu.cn; wangdh@whu.edu.cn

影响因子：19.924