NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY
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United States of America Patent
Stats
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N/A
Issued Date -
Aug 23, 2012
app pub date -
Oct 4, 2010
filing date -
Oct 22, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a negative electrode active material for a lithium-ion secondary battery, comprising SiOx that has an intensity ratio A1/A2 of 0.1 or less in spectra measured by a Fourier transform infrared spectrometer after subjecting the SiOx to evacuation treatment at 200° C., given that A1 designates an intensity of a silanol group-derived peak which appears around 3400 to 3800 cm−1, and A2 designates an intensity of a siloxane bond-derived peak which appears around 1000 to 1200 cm−1. It is preferred that x in the SiOx satisfies x<1; there is no sign of an Si—H bond-derived peak A3 that may normally exhibit around 2100 cm−1 in spectra of the SiOx measured by a laser Raman spectrometer; and a ratio Y/X is 0.98 or less, given that X is a mole ratio of O to Si in the whole body of the SiOx, and Y is a mole ratio of O to Si in a surface vicinity of the SiOx. A lithium-ion secondary battery having high initial efficiency and charge/discharge capacity can be obtained by using this active material.
First Claim
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Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | B2 | JP4809926 | Oct 01, 2010 |
| EP | A1 | EP2492995 | Oct 04, 2010 |
| CN | A | CN102576868 | Oct 04, 2010 |
| WO | A1 | WO2011048756 | Oct 04, 2010 |
| KR | B1 | KR101432403 | Oct 04, 2010 |
International Classification(s)
- 2010 Application Filing Year
- H01M Class
- 3014 Applications Filed
- 2582 Patents Issued To-Date
- 85.67 % Issued To-Date
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Patent Citation Ranking
- 1 Citation Count
- H01M Class
- 3.29 % this patent is cited more than
- 13 Age