A kind of surface modified cyano frame material and its preparation method and application

Abstract

The invention discloses a surface-modified cyano frame material and its preparation method and application, comprising the following steps: mixing sodium ferrocyanide, sodium pentacyanamide ferric ammonium and deionized water to obtain solution I; mixing soluble divalent manganese salt 1. Mix soluble divalent acetate with deionized water to obtain solution II; mix sodium salt with deionized water to obtain solution III; drop solutions I and II into solution III at the same time, and obtain a cyano-containing framework material through co-precipitation reaction suspension; mixing sodium hydroxide and deionized water to obtain solution IV; adding solution IV dropwise to the suspension, stirring and post-processing at a certain temperature to obtain a surface-modified cyano-based framework material. The invention effectively improves the structural stability of the cyano frame material and inhibits the product from being corroded by the electrolyte through simultaneous doping and surface coating.

Description

A kind of surface-modified cyano frame material and preparation method and application thereof technical field The present invention relates to low-cost energy storage battery field, be specifically related to a kind of surface-modified cyano frame material and preparation thereof methods and applications. Background technique [0002] Currently common energy storage batteries are lead-acid batteries and lithium-ion batteries. Although lead-acid batteries are less expensive, their energy The mass density is low, the life is short, and it is easy to cause environmental pollution. Although lithium-ion batteries have high energy density and long service life, But its cost is high and it is limited by lithium resources. In contrast, sodium-ion batteries have abundant resources, good safety performance, The advantages of low cost and environmental friendliness make it very suitable for large-scale energy storage applications. However, the radius of the sodium ion is sma...

AI Technical Summary

Problems solved by technology

However, the structure of the cyano-based framework material is unstable and easily corroded by the electrolyte, which leads to a decrease in the electrochemical performance of the sodium-ion battery.

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