A polymer-honeycomb aluminum composite current collector for a negative electrode-free sodium battery and preparation and negative electrode-free sodium ion battery
By constructing a multi-layer structure on the current collector of a sodium-free negative electrode battery, including a honeycomb-shaped three-dimensional porous aluminum substrate, a sodium-loving functional layer, and a polyacrylate elastic layer, the problems of uneven sodium ion deposition and dendrite growth are solved, thereby improving the battery's electrical and safety performance.
Patent Information
- Application Number
- CN202610287316.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-10
- Publication Date
- 2026-06-16
AI Technical Summary
Existing sodium-ion batteries without negative electrodes suffer from problems such as uneven sodium ion deposition, high local overpotential, tip discharge, and dendrite formation in the current collector, which affect the battery's safety performance and energy density.
A multi-layer composite current collector is adopted, including a honeycomb three-dimensional porous aluminum matrix, an in-situ grown sodium-loving functional layer, and a coated polyacrylate elastic layer. The sodium-loving/polymer hybrid layer is constructed on the aluminum matrix through pulsed anodizing and polymerization reaction, and then integrated in-situ with the solid electrolyte to reduce the nucleation barrier and interfacial impedance.
Uniform sodium ion deposition was achieved, reducing the nucleation barrier and interface impedance, and improving the electrical and safety performance of the cell. It is suitable for high-energy-density and high-safety electrodeless solid-state sodium-ion batteries.
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Figure CN122214847A_ABST