A Self-Regulated Interface toward Highly Reversible Aqueous Zinc Batteries

Han Daliang; Wang Zhenxing; Lu HaotianLi HuanCui ChangjunZhang ZhichengSun RuiGeng ChuannanLiang QinghuaGuo XiaoxiaMo YanbingZhi XingKang FeiyuWeng ZheYang Quan-Hong

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A Self-Regulated Interface toward Highly Reversible Aqueous Zinc Batteries

机译：A Self-Regulated Interface toward Highly Reversible Aqueous Zinc Batteries

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Aqueous zinc batteries, that demonstrate high safety and low cost, are considered promising candidates for large-scale energy storage. However, Zn anodes suffer from rapid performance deterioration due to the severe Zn dendrite growth and side reactions. Herein, with a low-cost ammonium acetate (NH4OAc) additive, a self-regulated Zn/electrolyte interface is built to address these problems. The NH4+ induces a dynamic electrostatic shielding layer around the abrupt Zn protuberance to make the Zn deposition uniform, and the OAc- acts as an interfacial pH buffer to suppress the proton-induced side reactions and the precipitation of insoluble by-products. As a result, in the electrolyte with the NH4OAc additive, Zn anodes exhibit a long cycling stability of 3500 h at 1 mA cm(-2), an impressive cumulative areal capacity of 5000 mAh cm(-2) at 10 mA cm(-2), and a high Coulombic efficiency of approximate to 99.7%. A prototype full cell coupled with a NH4V4O10 cathode performs much better in terms of capacity retention than the additive-free case. The findings pave the way for developing practical Zn batteries.

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来源
《Advanced energy materials》 |2022年第9期|2102982.1-2102982.8|共8页
作者
Han Daliang; Wang Zhenxing; Lu HaotianLi HuanCui ChangjunZhang ZhichengSun RuiGeng ChuannanLiang QinghuaGuo XiaoxiaMo YanbingZhi XingKang FeiyuWeng ZheYang Quan-Hong;
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Tianjin Univ, Sch Chem Engn & Technol, Nanoyang Grp State Key Lab Chem Engn, Tianjin 300072, Peoples R China;

Tianjin Univ, Sch Chem Engn & Technol, Nanoyang Grp State Key Lab Chem Engn, Tianjin 300072, Peoples R China|Tianjin Univ, Nanoyang Grp Joint Sch Natl Univ Singapore & Tian, Int Campus, Fuzhou 350207, Peoples R China;

Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, AustraliaUniv Melbourne, Dept Chem Engn, Parkville, Vic 3010, AustraliaTsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China;

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正文语种英语
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ammonium acetate; aqueous zinc batteries; dynamic regulation; electrolyte additives; pH buffers;

A Self-Regulated Interface toward Highly Reversible Aqueous Zinc Batteries

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