A method for the production of a titanium-based current collector for bipolar lead-acid batteries
By subjecting the titanium substrate to acid etching, anodizing, and electroplating, an inconsistent titanium-based bipolar current collector structure was constructed, solving the stability problem of the titanium substrate in lead-acid batteries. This resulted in a current collector with high stability and long lifespan, thus improving battery performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JILIN UNIVERSITY
- Filing Date
- 2026-03-24
- Publication Date
- 2026-07-17
AI Technical Summary
Titanium-based bipolar current collectors in lead-acid batteries suffer from passivation, corrosion, severe hydrogen evolution side reactions, and poor bonding with active materials, resulting in a short stability period.
After acid etching, anodizing, and annealing, a copper layer is electroplated on one side of the titanium substrate, and a lead or lead-tin alloy layer is electroplated on the other side to construct a high-roughness TiO2-TiN layer to enhance stability. This also blocks the electrolyte on the negative electrode side, forming an inconsistent titanium-based bipolar current collector structure.
It improves the interfacial stability and lifespan of titanium-based bipolar current collectors, reduces the amount of inactive materials, increases the energy density and power density of lead-acid batteries, and reduces the amount of heavy metal lead used.
Smart Images
Figure CN122417902A_ABST