Title:
ZINC-BASED ELECTROCHEMICAL ENERGY STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/044969
Kind Code:
A1
Abstract:
The present invention relates to the technical field of energy storage, and in particular to a zinc-based electrochemical energy storage device, at least comprising a positive electrode, a metal zinc negative electrode, and a fluorine-containing zinc salt electrolyte. The material of the positive electrode is at least one among a vanadium-based positive electrode, an organic redox active compound, Prussian blue and the like, a Chevrel-phase compound, and a transition metal chalcogenide. The fluorine-containing zinc salt electrolyte comprises a non-aqueous solvent and a fluorine-containing zinc salt solute, and the fluorine-containing zinc salt solute is at least one among anhydrous zinc tetrafluoroborate, hydrated zinc tetrafluoroborate, anhydrous zinc hexafluorophosphate, and hydrated zinc hexafluorophosphate. Compared with the existing technology, the zinc-based electrochemical energy storage device can generate, on the surface of the negative electrode, a dense fluorine-containing solid electrolyte interface layer that can isolate zinc ions of an electrolyte from being conductive and electrically insulated, effectively solving the problems of dendrite growth, corrosion, hydrogen evolution, and so on that exist for the negative electrode, and can also inhibit the dissolution of the positive electrode active material, improve the utilization rate of the positive electrode material, improve the circulation stability of the positive electrode material, and remarkably improve the comprehensive performance thereof.
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Inventors:
WENG ZHE (CN)
HAN DALIANG (CN)
CUI CHANGJUN (CN)
GUO XIAOXIA (CN)
YANG QUANHONG (CN)
HAN DALIANG (CN)
CUI CHANGJUN (CN)
GUO XIAOXIA (CN)
YANG QUANHONG (CN)
Application Number:
PCT/CN2021/122805
Publication Date:
March 30, 2023
Filing Date:
October 09, 2021
Export Citation:
Assignee:
UNIV TIANJIN (CN)
International Classes:
H01M10/054; H01G11/06; H01G11/62; H01M10/0568
Foreign References:
| CN110534808A | 2019-12-03 | |||
| CN111540963A | 2020-08-14 | |||
| CN109037794A | 2018-12-18 | |||
| CN108242560A | 2018-07-03 | |||
| CN108574085A | 2018-09-25 | |||
| CN110518295A | 2019-11-29 | |||
| CN107369567A | 2017-11-21 | |||
| CN110311171A | 2019-10-08 |
Attorney, Agent or Firm:
GUANGDONG GUANXIN LAW FIRM (CN)
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