High rate capability design of lithium ion secondary battery

Details High rate capability design of lithium ion secondary battery High rate capability design of lithium ion secondary battery

2010-08-25

2011-10-11

Rhee, Jane (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S211000, C429S221000, C429S239000

Reexamination Certificate

active

08034480

ABSTRACT:
A lithium ion secondary battery includes LiFePO4as a major component of the positive electrode active material. In order to implement the high rate capability with 10 C/1 C rate larger than 80%, the invention designs a positive electrode on a current collector with a ratio (A/t) of coating area to coating thickness greater than 1.2×106(mm) and uses more than one tab on the current collector. The design of the invention can be applied to other active materials with low conductivity as the positive electrode for lithium ion battery.

REFERENCES:
patent: 7803484 (2010-09-01), Wu et al.
patent: 2003/0003369 (2003-01-01), Dai
patent: 2005/0031953 (2005-02-01), Watanabe et al.
patent: 2005/0132562 (2005-06-01), Saito et al.
patent: 2007/0054186 (2007-03-01), Costello et al.
patent: 2007/0166617 (2007-07-01), Gozdz et al.

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