Effects of hydrogen bubbles on deformation of zinc anodes at high depth of discharge

被引：8

作者：

Yang, Chao ^{[1
]}

Liu, Xinjie ^{[1
]}

Yang, Kai ^{[2
]}

Lai, Yanqing ^{[2
]}

Zhang, Kai ^{[2
]}

Tian, Zhongliang ^{[2
]}

机构：

[1] Anhui Polytech Univ, Sch Chem & Environm Engn, Anhui Lab Funct Coordinated Complexes Mat Chem &, Beijing Middle Rd, Wuhu 241000, Peoples R China

[2] Cent South Univ, Sch Met & Environm, 932 Lushan South Rd, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2021年 / 25卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Secondary alkaline Zn-based batteries; Zn anode deformation; Hydrogen evolution reaction; Zn (OH)(4)(2-); SECONDARY ELECTRODES; ENGINEERING ANALYSIS; AIR BATTERIES; SHAPE CHANGE; PROGRESS; CELL;

D O I：

10.1007/s10008-020-04838-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effects of hydrogen evolution reaction on the deformation of zinc anode which cycles at nearly 100% depth of discharge (DOD) are studied. Results show that the generated hydrogen bubbles during charging process will gather on the surface of the middle of the anode and will cover the ZnO which is produced by the hydrolysis of Zn (OH)(4)(2-)and prevent ZnO participation in the charging process. Since the charge-discharge reaction only occurs at the edges of the bubbles, the multiple dissolution and redeposition of the active material results in the formation of a massive ZnO and a very low specific discharge capacity. This finding provides a new perspective for the deformation of zinc anodes of the secondary alkaline zinc-based batteries.

引用

页码：611 / 616

页数：6

共 21 条

[1] ENGINEERING ANALYSIS OF SHAPE CHANGE IN ZINC SECONDARY ELECTRODES .1. THEORETICAL [J].