Lithium secondary battery having anode containing aqueous binder
US9711794B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2013 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a lithium secondary battery that includes an anode coated with an anode mixture including an anode active material, a cathode coated with a cathode mixture including a cathode active material, and a non-aqueous electrolyte, wherein the anode mixture includes, as aqueous binders, carboxymethyl cellulose (CMC) having a degree of substitution of a hydroxyl group (—OH) with a carboxymethyl group (—CH2CO2H) of 0.7 to 1.2, a molecular weight (Mn) of 500,000 to 900,000, and a pH of 6.5 to 8.0 and styrene-butadiene rubber (SBR) having a particle diameter of 90 nm to 150 nm and a tensile strength of 90 kgf to 160 kgf, and the anode has an electrode coating amount of 10 to 20 mg/cm2 and that enhances electrode processability and reduces a swelling phenomenon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.