Binder composition for electrode for lithium-ion secondary battery and utilization thereof
US6756153B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jul 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A binder composition used for making an electrode for a lithium-ion secondary battery, which comprises polymer particles dispersed in an organic medium having a boiling point of 80-350° C. at normal pressure. The polymer (1) comprises structural units derived from a monoethylenically unsaturated carboxylic acid ester monomer, and at least one kind of structural units selected from (b) structural units derived from a monoethylenically unsaturated carboxylic acid monomer and (c) structural units derived from a conjugated diene monomer; (2) has a ratio of (a)/[(b)+(c)] of 99/1−60/40 by weight; (3) has a total content of (a), (b) plus (c) of at least 80 wt. % based on the total structural units; and (4) is substantially free from structural units of a monoethylenically aromatic hydrocarbon monomer. A lithium-ion secondary battery having an electrode made with the binder exhibits a large service capacity and enhanced charge-discharge characteristics at a high temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.