Low-resistance high-weatherability surface modified silver-coated nickel powder, and preparation method and application thereof

By chemically plating silver under weak acid conditions and using thiol compounds and thiol amino acid modifiers to prepare a dense silver layer, the problems of insufficient conductivity and weather resistance of silver-coated nickel powder were solved, and the high-efficiency conductive paste performance of HJT battery was achieved.

CN121624442BActive Publication Date: 2026-05-05HEFEI UNIV OF TECH
3 Cites 0 Cited by

Patent Information

Application Number
CN202610159707.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-05-05
Estimated Expiration
2046-02-04

AI Technical Summary

Technical Problem

In HJT batteries, the silver layer coating of traditional silver-coated nickel powder is discontinuous and not dense, resulting in insufficient conductivity and weather resistance. In addition, the modifier has poor compatibility with the resin matrix, which affects the conductivity and long-term stability of the slurry.

Method used

A dense silver layer was prepared by chemical silver plating under weak acid conditions. A stable organic-inorganic hybrid interface was formed by grafting a compound modifier of thiol compounds and thiol amino acids, which improved the compatibility and dispersibility of silver-coated nickel powder with the resin matrix.

Benefits of technology

This study achieved low-resistance, high-weather-resistant silver-coated nickel powder, which significantly improved the conductivity and stability of HJT battery conductive paste, reduced resistivity and percolation threshold, and enhanced interfacial bonding.

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

Abstract

This invention proposes a low-resistivity, high-weather-resistant surface-modified silver-coated nickel powder, its preparation method, and its application. The preparation method includes: chemically plating silver onto the surface of nickel powder under weak acid conditions to obtain silver-coated nickel powder; and grafting an organic modifier onto the surface of the silver-coated nickel powder to obtain the surface-modified silver-coated nickel powder. The organic modifier includes thiol compounds and thiol amino acids. This invention prepares a dense silver layer through chemical silver plating under weak acid conditions, thus ensuring complete silver coating, improving conductivity and weather resistance. The grafting of organic modifiers provides protection and improves the compatibility of the silver-coated nickel powder with the resin matrix. The resulting surface-modified silver-coated nickel powder exhibits excellent acid and alkali resistance and high stability in harsh environments. When used in HJT battery conductive pastes, it simultaneously achieves low resistivity and high weather resistance.
Need to check novelty before this filing date? Find Prior Art