Vanadium battery negative electrolyte based on organosilicon molybdate and application thereof

By adding organosilicon molybdate [TBA]4[SiMo12O40] and/or [BMIM]4[SiMo12O40] to the negative electrode electrolyte of vanadium batteries, a stable cage-like structure and hydrophobic microenvironment are formed, which solves the problem of insufficient low-temperature stability of vanadium batteries, expands the application range of vanadium batteries, and is particularly suitable for cold regions.

CN121726462BActive Publication Date: 2026-06-05CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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Patent Information

Application Number
CN202610231499.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-27
Publication Date
2026-06-05
Estimated Expiration
2046-02-27

AI Technical Summary

Technical Problem

Existing vanadium battery negative electrode electrolytes lack stability at low temperatures, limiting the application of vanadium batteries in cold regions, and existing additives have limited effectiveness.

Method used

Organosilicon molybdate [TBA]4[SiMo12O40] and/or [BMIM]4[SiMo12O40] are used as additives in the negative electrode electrolyte of vanadium batteries. By forming a stable Keggin-type cage structure and binding with vanadium ions, a hydrophobic microenvironment is provided, ice crystal formation is inhibited, and electrolyte stability is improved.

Benefits of technology

The stability of the negative electrode electrolyte of vanadium batteries is significantly improved at -30℃, which expands the temperature adaptability range of vanadium batteries, making them suitable for cold regions and enhancing the energy storage competitiveness of vanadium batteries.

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Abstract

The application belongs to the technical field of electrolyte of all-vanadium redox flow battery, and particularly relates to a vanadium battery negative electrode electrolyte based on organic silicon molybdate and application thereof. The vanadium battery negative electrode electrolyte provided by the application comprises vanadium ions, a supporting electrolyte and an organic silicon molybdate additive; the organic silicon molybdate additive is [TBA]4[SiMo 12 O 40 ] and / or [BMIM]4[SiMo 12 O 40 ]. The application adds the organic silicon molybdate to the vanadium battery negative electrode electrolyte, effectively improves the stability of the vanadium battery negative electrode electrolyte at low temperature, and expands the temperature adaptation range of the vanadium battery.
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Citation Information

Patent Citations

  • All-vanadium flow battery positive electrode electrolyte and preparation method thereof

    CN108258292A

  • Polymer electrolyte composition, and polymer electrolyte membrane, electrode catalyst layer, membrane electrode assembly and solid polymer fuel cell using the same

    JP2015008128A