Pulse current charging strategy towards high performance of lithium-oxygen batteries

被引：5

作者：

Xiao, Teng ^{[1
]}

Zhou, Zhenkai ^{[1
]}

Cao, Hui ^{[2
]}

Zhang, Jianli ^{[1
]}

Chen, Qiang ^{[1
]}

Hou, Guangya ^{[1
]}

Cao, Huazhen ^{[1
]}

Wen, Ming ^{[3
]}

Tang, Yiping ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China

[2] REPT Energy Co Ltd, New Airport Ind Area, 205 Binghai Six Rd, Wenzhou 325025, Zhejiang, Peoples R China

[3] Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China

来源：

SURFACES AND INTERFACES | 2021年 / 24卷

基金：

中国国家自然科学基金;

关键词：

Pulse charging; Oxygen evolution reaction; Overpotential; Cycle performance; METAL-AIR BATTERIES; LI-O-2; BATTERIES; ION BATTERY; ELECTRODE; LIMITATIONS; STABILITY; CLUSTERS;

D O I：

10.1016/j.surfin.2021.101106

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large overpotential and poor cyclability are the main constraints for lithium-oxygen batteries (LOBs), which are usually related to the slow decomposition of the discharge product during oxygen evolution reaction (OER) of charging process. In this paper, a novel method of pulse current charging is developed for solving these problems. The results show, compared with the normal constant current samples, when duty cycle is 50% and frequency is 1 Hz and, the overpotential decreases up to 25% and the cycle life improves more than 4 times. During charging process, pulse current can reduce the concentration polarization and promote the decomposition of Li2O2, and increase the reaction kinetics of OER process, leading to the reduction of overpotential and improvement of electrochemical performance.

引用

页数：8

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