Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1994-08-16
1996-11-12
Bell, Bruce F.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
429103, 429104, 429107, 429122, 429191, 429218, 429221, 429224, 429247, H01M 432
Patent
active
055738737
ABSTRACT:
The premature capacity failure of Ni/NiCl.sub.2 secondary cells due to agglomeration of nickel particles on the surface of the NiCl.sub.2 cathode is prevented by addition of a minor amount, such as 10 percent by weight of a transition metal such as Co, Fe or Mn to the cathode. The chlorides of the transition metals have lower potentials than nickel chloride and chlorinate during charge. A uniform dispersion of the transition metals in the cathodes prevents agglomeration of nickel, maintains morphology of the electrode, maintains the electrochemical area of the electrode and thus maintains capacity of the electrode. The additives do not effect sintering. The addition of sulfur to the liquid catholyte is expected to further reduce agglomeration of nickel in the cathode.
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Bugga Ratnakumar V.
Halpert Gerald
Surampudi Subbarao
Bell Bruce F.
Jones Thomas H.
The United States of America as represented by the Administrator
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