Strategy of manipulating La/Ce ratio to develop metal hydride electrode with excellent capacity even at-40 degrees C

时间:2023-05-25作者:浏览量:10


Strategy of manipulating La/Ce ratio to develop metal hydride electrode with excellent capacity even at-40 degrees C

作者:Tan, C (Tan, Cheng) [1] , [2] ; Jiang, WB (Jiang, Wenbin) [1] , [2] ; Cui, J (Cui, Jie) [3] ; Min, D (Min, De) [4] ; Liao, CH (Liao, Canhui) [4] ; Ouyang, LZ (Ouyang, Liuzhang) [1] , [2] , [5] ; Zhu, M (Zhu, Min) [1] , [2]

卷543

文献号231817

DOI10.1016/j.jpowsour.2022.231817

出版时间SEP 30 2022

在线发表JUL 2022

已索引2022-10-16

文献类型Article

摘要

Metal hydride electrodes have been widely used in Ni/MH batteries, but their low-temperature discharge (LTD) performance restricts practical application. Herein, we propose a facile strategy for tuning the La/Ce ratio to prepare metal hydride electrodes for ultra-low-temperature Ni/MH batteries. The enthalpy shifts in the positive direction with a decrease in the La/Ce ratio and the thermodynamic stability decreases. Moreover, the resultant enhanced charge transfer and proton diffusion endows the electrode with impressive kinetics at -40 degrees C. One novel candidate, namely, La0.55Ce0.37M electrode presents the highest reported capacity of 317.3 mAh g(-1) (0.2C) and the highest discharge specific capacity of 27.2 mAh g(-1) (1C) even at -40 degrees C. A commercial-grade AAA nickel-metal hydride battery concomitantly presents the specific capacity of 71 and 456 mAh at a large current of 1000 mA at -40 and -20 degrees C, respectively. The excellent LTD performance indicates the suitability of this strategy for developing advanced ultra-low-temperature Ni/MH batteries.


关键词

作者关键词Ni/MH batteryMetal hydride electrodeUltra-low-temperature performanceLa/ce ratio

Keywords PlusLOW-TEMPERATURELITHIUM-IONBATTERYBEHAVIORLAENTHALPIESCORROSIONALLOYSCERIUM

作者信息

通讯作者地址

Ouyang, Liuzhang

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

通讯作者地址

Ouyang, Liuzhang

(通讯作者)

South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China

所属机构

South China University of Technology

通讯作者地址

Cui, Jie

(通讯作者)

South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

2 South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China

3 South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Peoples R China

4 Sihui City Double Win Ind CO LTD, Zhaoqing, Guangdong, Peoples R China

5 China Australia Joint Lab Energy & Environm Mat &, Guangzhou 510641, Peoples R China

电子邮件地址czcuijie@scut.edu.cnmeouyang@scut.edu.cn

类别/分类

研究方向ChemistryElectrochemistryEnergy & FuelsMaterials Science

引文主题

2 Chemistry

2.282 Hydrogen Chemistry & Storage

2.282.594 Hydrogen Storage

Sustainable Development Goals

07 Affordable and Clean Energy

Web of Science 类别Chemistry, PhysicalElectrochemistryEnergy & FuelsMaterials Science, Multidisciplinary