Lanthanum-doped manganese dioxide nanowire material, preparation method and application thereof

By preparing lanthanum-doped manganese dioxide nanowires, the problems of conductivity and structural instability of manganese dioxide cathode materials were solved, improving the electrochemical performance and cycle stability of aqueous zinc-ion batteries and enabling efficient battery applications.

CN122102214APending Publication Date: 2026-05-29HUNAN UNIV OF HUMANITIES SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV OF HUMANITIES SCI & TECH
Filing Date
2026-02-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing manganese dioxide cathode materials suffer from low intrinsic conductivity, structural instability, and manganese dissolution issues, resulting in poor cycle stability and rate performance of aqueous zinc-ion batteries.

Method used

A method for preparing lanthanum-doped manganese dioxide nanowires was adopted. By controlling reaction conditions such as pH value, ultrasonic parameters and hydrothermal temperature, a nanowire structure with high crystallinity and high aspect ratio was formed, thereby improving the synergistic regulation of the electronic state and crystal structure of the material.

Benefits of technology

High conductivity and structural stability of aqueous zinc-ion batteries were achieved, improving the electrochemical performance of the materials. In particular, they exhibited excellent cycle stability and discharge specific capacity at high current densities, extending battery life.

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Abstract

The application belongs to the field of battery materials, and particularly relates to a lanthanum-doped manganese dioxide nanowire material and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving manganese sulfate and a soluble lanthanum salt in deionized water to form a uniform solution A by stirring at room temperature; S2, dissolving potassium permanganate in deionized water to form a solution B; S3, slowly dropping the solution B into the solution A, and continuously stirring to obtain a mixed solution C; S4, adding appropriate dilute sulfuric acid to adjust the pH to obtain a mixed solution D; S5, ultrasonic treatment; S6, loading the mixed solution D into a polytetrafluoroethylene reaction kettle, sealing, and placing in an oven to perform a hydrothermal reaction; S7, cooling to room temperature after the reaction is completed, repeatedly cleaning with alcohol and deionized water, and centrifugally collecting the product to obtain the lanthanum-doped manganese dioxide nanowire material. The material is applied in a water-based zinc ion battery as a positive electrode material, can simultaneously improve the intrinsic electrical conductivity and structural stability, and the developed water-based zinc ion battery has good performance and a long service life. The preparation process is simple, the cost is low, the yield is high, and the industrial production and application potential are huge.
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