Title:
SILICON NEGATIVE ELECTRODE MATERIAL AND HIGH-CAPACITY FAST-CHARGING BATTERY USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/138528
Kind Code:
A1
Abstract:
A silicon negative electrode material and a high-capacity fast-charging battery using same. The silicon negative electrode material has a gel-state three-dimensional network structure and is prepared from the following components in parts by weight: 25 of a nanoscale silicon material, 1-3 of a fused SiO2 powder, and 72-74 of a polar electrolyte solution, wherein the fused SiO2 powder is a hydrophobic nanometer fused SiO2 powder, and the particle size of the hydrophobic nanometer fused SiO2 powder is 7-40 nm; and the polar electrolyte solution is prepared by mixing a lithium salt, a polar solvent and a conductive additive. With regard to the silicon negative electrode material, the uniformly distributed space and dispersed expansion space of silicon material nanoparticles are formed by constructing a gel-state three-dimensional network structure, and the overall volume expansion of the silicon negative electrode material is avoided during charging and discharging, such that the energy density of a power battery is greatly improved.
Inventors:
DAI WENTAO (CN)
Application Number:
PCT/CN2023/072328
Publication Date:
July 27, 2023
Filing Date:
January 16, 2023
Export Citation:
Assignee:
DAI WENTAO (CN)
International Classes:
H01M4/62
Foreign References:
| CN114388810A | 2022-04-22 | |||
| CN110556544A | 2019-12-10 | |||
| CN104505533A | 2015-04-08 | |||
| CN104347856A | 2015-02-11 | |||
| CN113078289A | 2021-07-06 | |||
| CN103515657A | 2014-01-15 | |||
| CN103107357A | 2013-05-15 | |||
| CN106159302A | 2016-11-23 | |||
| CN110120542A | 2019-08-13 | |||
| CN113851729A | 2021-12-28 |
Other References:
HAMELET S., LARCHER D., DUPONT L., TARASCON J.-M.: "Silicon-Based Non Aqueous Anolyte for Li Redox-Flow Batteries", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, ELECTROCHEMICAL SOCIETY., vol. 160, no. 3, 1 January 2013 (2013-01-01), pages A516 - A520, XP093080112, ISSN: 0013-4651, DOI: 10.1149/2.002304jes
Attorney, Agent or Firm:
CHANGSHA ZHIRONG PATENT AGENCY (ORDINARY PARTNERSHIP) (CN)
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