Chemistry: electrical current producing apparatus – product – and – Preserving cell in storage feature
429 49, 429 50, 429188, H01M 600
A PbO.sub.2 cathode of a lead-acid battery is activated by electrochemical doping with colloidal solution of carbon which is subjected to electrochemical modification endowed with --C--O--O-- and C--O-- groups on its surface. The battery shows the following advantageous characteristics: (i) high charge current without extraordinary increase in the temperature; (ii) high discharge current; and (iii) the increase in the lifetime of the battery. This process is applicable for the revival of degraded batteries and formation treatment of electrodes of new batteries. Thus, lead-acid batteries of high performance can be obtained.
patent: 3840407 (1974-10-01), Yao et al.
patent: 5185221 (1993-02-01), Rampel
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