Polymer-sulfur composite materials for electrodes in Li-S energy storage devices
US9929429B2 · kind B2 · utility
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Key dates
| Filing date | Jul 30, 2012 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Jul 30, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Composite materials containing sulfurized polymers and sulfur-containing particles can be used in lithium-sulfur energy storage devices as a positive electrode. The composite material exhibits relatively high capacity retention and high charge/discharge cycle stability. In one particular instance, the composite comprises a sulfurized polymer having chains that are cross-linked through sulfur bonds. The polymer provides a matrix in which sulfide and/or polysulfide intermediates formed during electrochemical charge-discharge processes of sulfur can be confined through chemical bonds and not mere physical confinement or sorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.