Cathode electrode of zinc-bromine static battery apparatus and method of preperation thereof
The cathode electrode in zinc-bromine static batteries, made from a quaternary ammonium salt and SPC composite with a binder, addresses bromine diffusion issues, improving efficiency and longevity by enhancing ionic conductivity and structural integrity.
Patent Information
- Authority / Receiving Office
- GB · GB
- Patent Type
- Applications
- Current Assignee / Owner
- OFFGRID ENERGY LABS INC
- Filing Date
- 2025-08-13
- Publication Date
- 2026-04-22
AI Technical Summary
Conventional zinc-bromine static batteries face issues with bromine diffusion from the cathode electrode into the electrolyte solution during charging, leading to decreased efficiency, increased cell voltage, corrosion, and reduced cycle life due to unwanted side reactions and bromine crossover.
A cathode electrode composed of a quaternary ammonium salt fused with super P carbon (SPC) and a binder, such as polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF), is used to form a stable composite material that enhances ionic conductivity, reduces resistance, and maintains structural integrity, thereby mitigating bromine diffusion and improving battery performance.
The composite cathode electrode reduces internal resistance, increases charge/discharge efficiency, and enhances energy density, ensuring consistent performance and longevity by preventing bromine crossover and maintaining electrochemical stability.
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