发明名称 |
Perforated current collectors for storage batteries and electrochemical cells, having improved resistance to corrosion |
摘要 |
A process for enhancing chemical stability and corrosion resistance is described for perforated current collectors made by continuous production processes for use in electrochemical cells, including storage batteries such as lead-acid batteries. The process relies on utilizing a strip processing method, selected from the group of reciprocating expansion, rotary expansion and punching, to perforate the solid metal strip to form a grid or mesh, as a deformation treatment. The perforation-deformation treatment is followed in rapid succession by a heat-treatment to obtain a recrystallized microstructure in the current collector and optionally by quenching to rapidly reduce the temperature to below approximately 80° C. The process yields an improved microstructure consisting of a high frequency of special low Sigma CSL grain boundaries (>50%), exhibiting significantly improved resistance to intergranular corrosion and cracking. Perforated current collectors produced with this process from a solid lead-alloy strip exhibit superior growth and corrosion properties when employed as positive grids in a lead-acid battery. |
申请公布号 |
AU6198201(A) |
申请公布日期 |
2001.12.11 |
申请号 |
AU20010061982 |
申请日期 |
2001.05.24 |
申请人 |
INTEGRAN TECHNOLOGIES INC. |
发明人 |
DAVID L. LIMOGES;GINO PALUMBO;PETER K. LIN;KLAUS TOMANTSCHGER |
分类号 |
H01M4/74;C22F1/12;H01M;H01M4/68;H01M4/73;H01M4/82 |
主分类号 |
H01M4/74 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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