Secondary battery negative electrode material
US10270085B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 2015 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Sep 3, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A secondary battery negative electrode material comprises a framework, a chelating/adsorption group and an active substance. The framework does not participate in electrochemical reaction, and only provides a carrier for the chelating/adsorption group (represented by iminodiacetic acid chelating groups in Figure), which contains N, S, P, O atoms having lone pair electrons in outer electrons and has chelating/chemical adsorption bonds formed between it and bivalent/polyvalent metals. The active substance is bivalent/polyvalent metal ion that can be reduced into lower valence states. The active substance metal ion is reduced, during charging, to metal in a lower valence/metal elemental state, which reversely forms, during discharging, the metal ion and has chelating/chemical adsorption bonds formed between it and the chelating/adsorption group. The negative electrode material can form a battery together with positive electrode materials. The battery is expected to be applied to electric vehicles or large-scale energy-storage projects for low price and reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.