Negative electrode material for use in lithium-ion secondary bat

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4234472, H01M 462

Patent

active

057925771

ABSTRACT:
A negative electrode material for use in lithium-ion secondary batteries, comprising milled pitch-based graphite fibers (A) obtained by graphitization at 2400.degree. C. or higher and milled pitch-based carbon fibers (B) obtained by carbonization at 550.degree. to 1300.degree. C. In this negative electrode material, it is preferred that both the milled pitch-based graphite fibers (A) and the milled pitch-based carbon fibers (B) have an average particle size of 10 to 30 .mu.m, that the ratio of milled pitch-based carbon and graphite fibers having a particle size of 5 .mu.m or less to all the milled pitch-based carbon and graphite fibers is not greater than 10% by weight and that the milled pitch-based graphite fibers (A) and the milled pitch-based carbon fibers (B) are blended at a weight ratio (A/B) of 95/5 to 40/60. A negative electrode which has a large capacity at the time of having been stabilized, exhibits a high charge and discharge efficiency at the initial stage and is excellent in charge and discharge cycle characteristics can be provided by the blending of milled pitch-based carbon fibers with milled pitch-based graphite fibers.

REFERENCES:
patent: 4849200 (1989-07-01), Uemura et al.
patent: 4882139 (1989-11-01), Beneke et al.
patent: 5167945 (1992-12-01), Ogawa et al.
patent: 5169616 (1992-12-01), Ross
Patent Abstracts of Japan, JP-A-3 129664, Jun. 3, 1991.
Patent Abstracts of Japan, JP-A-5 283061, Oct. 29, 1993.
Patent Abstracts of Japan, JP-A-6 111818, Apr. 22, 1994.
Patent Abstracts of Japan, JP-A-6 150931, May 31, 1994.
Patent Abstracts of Japan, JP-A-7 085862, Mar. 31, 1995.
Patent Abstracts of Japan, JP-A-7 161347, Jun. 23, 1995.
Patent Abstracts of Japan, JP-A-7 192724, Jul. 28, 1995.
Patent Abstracts of Japan, JP-A-8 069798, Mar. 12, 1996.
Patent Abstracts of Japan, vol. 095, No. 009, Oct. 31, 1995, JP 07 142068, Jun. 2, 1995.
Patent Abstracts of Japan, vol. 015, No. 311, Aug. 8, 1991, JP 03 114106, May 15, 1991.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Negative electrode material for use in lithium-ion secondary bat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Negative electrode material for use in lithium-ion secondary bat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative electrode material for use in lithium-ion secondary bat will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-387644

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.