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