Tuning the overcharge resistance of metal hydride electrodes by trace Nb-doping for aqueous batteries
By
Tan, C (Tan, Cheng) [1] , [2] , [3] ; Jiang, WB (Jiang, Wenbin) [1] , [2] ; Ma, BJ (Ma, Bingjie) [1] , [2] ; Ouyang, LZ (Ouyang, Liuzhang) [1] , [2] ; Wang, H (Wang, Hui) [1] , [2] ; Min, D (Min, De) [4] ; Zhu, M (Zhu, Min) [1] , [2]
(provided by Clarivate)
Source
JOURNAL OF ALLOYS AND COMPOUNDS
Volume993
DOI10.1016/j.jallcom.2024.174505
Article Number
174505
Published
JUL 25 2024
Early Access
APR 2024
Indexed
2024-08-22
Document Type
Article
Abstract
Metal hydride electrodes have been widely used in alkaline aqueous batteries due to their merits of good comprehensive performance, high safety, and environmental benignity. However, their further development is hindered by poor overcharge resistance and limited cycle stability at elevated temperatures. Herein, we describe the preparation of La 0.68 Ce 0.30- x Zr 0.02 Nb x Ni 4.16 Co 0.36 Mn 0.30 Al 0.38 (x x = 0, 0.025, 0.05) metal hydride electrodes with high standard potential, bulk modulus, and hydrogen adsorption energy by doping with Nb. Combined experimental and theoretical results have indicated that Nb occupies B-sites in the AB5 5 structure and that its presence promotes H* formation and inhibits H2 2 formation by increasing the overpotential. Nb-doping improves the cycle stability of metal hydride electrodes at 50 degrees C by imparting resistance to pulverization and corrosion, and significantly improves the overcharge resistance performance by increasing the overpotential. Therefore, such metal hydride electrodes can be expected to display overcharge resistance at elevated temperature when deployed in aqueous batteries.
Keywords
Author KeywordsMetal hydride electrodeFirst-principles calculationsOvercharge resistanceElevated temperatureNiobium-doping
Keywords PlusHYDROGEN STORAGE ALLOYSHIGH-TEMPERATURE PERFORMANCEELECTROCHEMICAL PROPERTIESNILACORROSIONSURFACECO
Author Information
Corresponding Address
Ouyang, Liuzhang
(corresponding author)
South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
Corresponding Address
Ouyang, Liuzhang
(corresponding author)
South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China
Affiliation
South China University of Technology
South China University of Technology School of Materials Science and Engineering
South China University of Technology Guangdong Key Laboratory of Advanced Materials for Energy Storage Research Center
E-mail Addresses
meouyang@scut.edu.cn
Addresses
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 Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming, Peoples R China
4 Sihui City Double Win Ind CO LTD, Zhaoqing, Peoples R China
E-mail Addresses
meouyang@scut.edu.cn
Categories/ Classification
Research AreasChemistryMaterials ScienceMetallurgy & Metallurgical Engineering
Citation Topics
2 Chemistry
2.282 Hydrogen Chemistry & Storage
2.282.594 Hydrogen Storage
Sustainable Development Goals
07 Affordable and Clean Energy
Web of Science Categories
Chemistry, PhysicalMaterials Science, MultidisciplinaryMetallurgy & Metallurgical Engineering