US 11,929,488 B2
AB5-based hydrogen storage alloy, electrode for Ni-MH battery, secondary battery, and preparation method of hydrogen storage alloy
Liuzhang Ouyang, Guangzhou (CN); Cheng Tan, Guangzhou (CN); Min Zhu, Guangzhou (CN); De Min, Zhaoqing (CN); Hui Wang, Guangzhou (CN); Tongzhao Luo, Zhaoqing (CN); Fangming Xiao, Guangzhou (CN); and Renheng Tang, Guangzhou (CN)
Assigned to South China University of Technology, Guangzhou (CN); Sihui Dabowen Industrial Co., Ltd., Zhaoqing (CN); and Guangdong Research Institute of Rare-Metal, Guangzhou (CN)
Appl. No. 17/286,614
Filed by South China University of Technology, Guangzhou (CN); Sihui Dabowen Industrial Co., Ltd., Zhaoqing (CN); and Guangdong Research Institute of Rare-Metal, Guangzhou (CN)
PCT Filed May 28, 2019, PCT No. PCT/CN2019/088704
§ 371(c)(1), (2) Date Apr. 19, 2021,
PCT Pub. No. WO2020/107832, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 201811455993.6 (CN), filed on Nov. 30, 2018.
Prior Publication US 2022/0006070 A1, Jan. 6, 2022
Int. Cl. H01M 4/134 (2010.01); C22C 1/02 (2006.01); C22C 19/03 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/134 (2013.01) [C22C 1/023 (2013.01); C22C 19/03 (2013.01); C22C 2202/04 (2013.01); H01M 2004/027 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An AB5-based hydrogen storage alloy, characterized in that: its chemical composition is represented by the following general formula:
La(3.0˜3.2)xCexZrySm(1-(4.0˜4.2)x-y)Ni2CouMnvAlw,
where x, y, w are molar ratios, and 0.14≤x≤0.17, 0.02≤y≤0.03, 4.60≤z+u+v+w≤5.33, 0.10≤u≤0.20, 0.25≤v≤0.30, and 0.30≤w≤0.40.