Flexible lithium manganate positive pole piece and preparation method thereof

By employing the assembly and in-situ polymerization technology of polystyrene sulfonate-modified carbon nanofiber membranes and lithium manganese oxide particles in lithium manganese oxide cathode sheets, a continuous conductive network is formed, which solves the self-support and interface bonding problems of flexible lithium-ion battery cathode sheets and improves the flexibility and electrochemical performance of the electrode sheets.

CN122393221AActive Publication Date: 2026-07-14ANHUI ZHONGLI NEW ENERGY TECH CO LTD
4 Cites 0 Cited by

Patent Information

Application Number
CN202610876939.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-17
Publication Date
2026-07-14
Estimated Expiration
2046-06-17

AI Technical Summary

Technical Problem

Existing flexible lithium-ion battery cathode sheets have shortcomings in terms of self-support, uniform component distribution, and strong interfacial bonding. In particular, they are prone to interfacial slippage and detachment during bending, and lack effective interfacial design.

Method used

By assembling a carbon nanofiber membrane grafted with polystyrene sulfonate and lithium manganese oxide particles adsorbed with polystyrene sulfonate into a filter cake layer, and then performing in-situ confined polymerization of aniline monomers under oxidant-free conditions, a continuous conductive network and a stable self-supporting structure are formed, which enhances the physical entanglement and electrostatic interaction between carbon nanofibers and lithium manganese oxide particles.

Benefits of technology

This method achieves self-support, uniform component distribution, and strong interfacial bonding in lithium manganese oxide cathode sheets, improving the flexibility and electrochemical stability of the sheets and reducing the risk of interfacial slippage and detachment during bending.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a flexible lithium manganate positive pole piece and a preparation method, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: assembling a carbon nanofiber membrane grafted with polystyrene sulfonate on the surface and lithium manganate particles adsorbed with polystyrene sulfonate on the surface into a filter cake layer in close contact through vacuum filtration, slowly permeating through the filter cake layer by using an aniline solution, and standing and adsorbing under the condition of no oxidant; the preparation method comprises the following steps: uniformly adsorbing an aniline monomer on a polystyrene sulfonate template to form a monomer reaction layer with consistent thickness, carrying out in-situ confinement polymerization on the monomer reaction layer, and carrying out gradient heating hot-pressing treatment on a composite membrane obtained after polymerization drying to realize polyaniline molecular chain rearrangement and further compaction of an interface of carbon fibers and lithium manganate, so as to obtain the lithium manganate / polyaniline composite membrane. The positive active film layer of the flexible self-supporting positive pole piece does not contain a metal current collector, has a three-dimensional conductive network and is in a relatively stable conductive state. The method is suitable for the fields of flexible lithium ion batteries, wearable electronic equipment, solid-state lithium batteries and the like.
Need to check novelty before this filing date? Find Prior Art