Structural evolution and electrochemical hydrogen storage properties of single-phase A5B19-type (La0.33Y0.67)5Ni17.6Mn0.9Al0.5 alloy

时间:2023-05-25作者:浏览量:10


Structural evolution and electrochemical hydrogen storage properties of single-phase A5B19-type (La0.33Y0.67)5Ni17.6Mn0.9Al0.5 alloy

作者:Zhao, SQ (Zhao, Shiqian) [1] ; Yang, LC (Yang, Lichun) [1] ; Liu, JW (Liu, Jiangwen) [1] ; Ouyang, LZ (Ouyang, Liuzhang) [1] ; Zhu, M (Zhu, Min) [1] ; Wang, H (Wang, Hui) [1]

卷548

文献号232039

DOI10.1016/j.jpowsour.2022.232039

出版时间NOV 15 2022

在线发表SEP 2022

已索引2022-10-21

文献类型Article

摘要

La-Y-Ni-based superlattice alloys demonstrate the potential as high-capacity anodes for Nickel-metal hydride batteries. However, the usual multi-phase structure formed in A5B19-type La-Y-Ni-based alloys makes precise investigations of composition-structure-performance relationships difficult. This work optimizes the quenching temperature to obtain the single-phase (La0.33Y0.67)5Ni17.6Mn0.9Al0.5 alloy with a hexagonal 2H-Pr5Co19 struc-ture. The single-phase alloy exhibits better overall electrochemical properties than multi-phase alloys, such as the maximum discharge capacity of 368.8 mAh g-1, the capacity retention at the 200th cycle of 73.4%, and the rate performance at a high discharge current of 1500 mA g-1 of 58.6%. The ex-situ X-ray diffraction research reveals that during charging, the single-phase alloy sequentially forms beta and gamma hydrides, with the beta hydride exhibiting the highest lattice strain, mainly due to the asynchronous hydrogenation and expansion between [A2B4] and [AB5]-2 subunits. This work offers meaningful guidance for developing high-performance La-Y-Ni-based electrode alloys.


关键词

作者关键词Ni-MH batteriesLa-Y-Ni-based alloysSuperlattice structureSubunit volumeCycling stability

Keywords PlusNICKEL-METAL HYDRIDEANNEALING TEMPERATURECYCLIC STABILITYNIBATTERIESPERFORMANCEMECHANISMA(2)B(7)SYSTEMMN

作者信息

通讯作者地址

Wang, Hui

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

所属机构

South China University of Technology

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址mehwang@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