Alkaline battery negative electrode material and preparation method thereof
By using supercritical carbon dioxide treatment and composite surfactant mother liquor, combined with segmented speed-controlled stirring in a vacuum stirred tank and nitrogen degassing process, the problem of uneven density caused by bubbles in the preparation of alkaline battery negative electrode materials was solved, thereby improving the performance and lifespan of the battery.
CN120933283APending Publication Date: 2025-11-11YUNAN HUTOU POWER TECH CO LTD
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202511091981.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-05
- Publication Date
- 2025-11-11
AI Technical Summary
Technical Problem
Existing alkaline battery anode materials are prone to generating bubbles during the preparation process, resulting in uneven paste density and affecting battery performance and lifespan.
Method used
The zinc powder surface is treated with supercritical carbon dioxide and coated with gas phase plasma. Combined with composite surfactant mother liquor and segmented speed-controlled stirring in a vacuum stirring tank, a dense zinc paste is formed through multiple rounds of vacuum-atmospheric pressure switching and nitrogen degassing process.
Benefits of technology
It improves the density and conductivity of zinc paste, enhances the conductivity and storage stability of alkaline batteries, and extends battery life.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses an alkaline battery negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: S1, zinc powder pretreatment: after zinc powder is cleaned by supercritical carbon dioxide, boron-containing gas is introduced for gas-phase coating passivation; s2, preparation of a composite surfactant mother solution: preparing the composite surfactant mother solution composed of polyether modified siloxane and the like; s3, performing vacuum wet mixing on zinc paste: performing dry mixing and pre-wetting on zinc powder and a surfactant, and performing wet mixing on the zinc powder and a KOH electrolyte in a vacuum kettle to prepare the paste; s4, paste injection and compaction: injecting the zinc paste into a negative electrode cup of the zinc-manganese alkaline battery, and performing compaction molding; impurities on the surface of the zinc powder are removed through supercritical carbon dioxide treatment, and a nano passive film is formed in the atmosphere of triethyl borane or methyl borate, so that corrosion and hydrogen evolution reaction are effectively inhibited; the composite surfactant can improve the wetting and dispersing performance of the zinc powder, and is matched with vacuum stirring and nitrogen defoaming processes to reduce bubble residues and improve the compactness of the zinc paste, so that the capacity stability of the alkaline battery is improved.
Need to check novelty before this filing date? Find Prior Art