Invention Grant
- Patent Title: Hydrogen storage alloy for alkaline storage battery, and alkaline storage battery and alkaline storage battery system each including negative electrode having the alloy
- Patent Title (中): 用于碱性蓄电池的储氢合金，以及碱性蓄电池和碱性蓄电池系统，每个包括具有合金的负极
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Application No.: US13051493Application Date: 2011-03-18
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Publication No.: US09105947B2Publication Date: 2015-08-11
- Inventor: Hiromasa Sugii , Makoto Ochi , Shuuhei Yoshida , Yoshinobu Katayama , Kazuhiro Kitaoka , Masao Takee
- Applicant: Hiromasa Sugii , Makoto Ochi , Shuuhei Yoshida , Yoshinobu Katayama , Kazuhiro Kitaoka , Masao Takee
- Applicant Address: JP Osaka
- Assignee: SANYO Electric Co., Ltd.
- Current Assignee: SANYO Electric Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2010-062662 20100318; JP2011-016242 20110128
- Main IPC: C22C19/03
- IPC: C22C19/03 ; H01M4/42 ; H01M4/46 ; H01M10/34 ; H01M4/38 ; C01B3/00 ; C01B6/24 ; H01M10/44
Abstract:
To provide a hydrogen storage alloy for an alkaline storage battery that improves output power by pulverization of the alloy in the initial stage of partial charge and discharge cycles and that maintains its surface condition to improve the amount of lifetime work (Wh), and an alkaline storage battery and battery system. A hydrogen storage alloy for an alkaline storage battery includes a composition expressed by LaxReyMg1-x-yNin-m-vAlmTv (Re: rare earth element(s) including Y; T: Co, Mn, Zn; 0.17≦x≦0.64, 3.5≦n≦3.8, 0.06≦m≦0.22, v≧0), and a main phase of an A5B19 type crystal structure. A ratio of X/Y of the concentration ratio X of Al to Ni in a surface layer and the concentration ratio Y of Al to Ni in a bulk layer is 0.36≦X/Y≦0.85. An alkaline storage battery includes the hydrogen storage alloy in its negative electrode. An alkaline storage battery system performs partial charge and discharge control.
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