Water soluble salt-based zinc electrolyte and application thereof in secondary zinc battery

An electrolyte and molten salt technology, which is applied to a molten salt-based zinc electrolyte and its application in a secondary zinc battery, can solve the problems of interfering with the metal coordination environment, interfering with the cycle performance of the battery, etc. Solve the effect of poor cycle stability and simple process

Pending Publication Date: 2020-08-14
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional aqueous solutions will produce a large number of complex side reactions with zinc anodes, which will interfere with battery cycle performance
At the same time, during the operation, the unavoidable moisture absorption will also disturb the pristine metal coordination environment.

Method used

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  • Water soluble salt-based zinc electrolyte and application thereof in secondary zinc battery
  • Water soluble salt-based zinc electrolyte and application thereof in secondary zinc battery
  • Water soluble salt-based zinc electrolyte and application thereof in secondary zinc battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 2.00g of succinonitrile with 4.64g of zinc perchlorate hexahydrate (the molar ratio of succinonitrile to zinc perchlorate hexahydrate is 2 / 1) at room temperature, then place it in a high temperature environment of 80°C and stir , after being melted into a clear liquid, cooled to a greenhouse to obtain a uniform water-soluble zinc electrolyte of different proportions of succinonitrile + perchloric acid hexahydrate.

Embodiment 2

[0040] The steps were the same as in Example 1, and the quality of zinc perchlorate hexahydrate was replaced by 0.46g (the molar ratio of succinonitrile to zinc perchlorate hexahydrate was 20 / 1).

Embodiment 3

[0042] The steps are the same as in Example 1, the quality of zinc perchlorate hexahydrate is replaced by 2.33g (the molar ratio of succinonitrile to zinc perchlorate hexahydrate is 4 / 1).

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Abstract

The invention relates to a water soluble salt-based zinc electrolyte, in particular to a water soluble salt-based zinc electrolyte and an application thereof in a secondary zinc battery. The water soluble salt-based zinc electrolyte is a nitrile compound and a zinc salt containing crystal water. The water soluble salt-based zinc electrolyte provided by the invention has the characteristics of lowviscosity, high stability, high ionic conductivity, the low freezing point, low cost and insensitivity to moisture and air; and the reversibility and the stability of electrochemical deposition / dissolution of the zinc electrode can be remarkably improved through a special solvation environment and an electrode interface adsorption structure, so that the problem of short cycle life of the aqueous secondary zinc battery is effectively solved. The secondary zinc battery using the water soluble salt-based zinc electrolyte has good charging-discharging cycle performance, and is green, environmentally friendly and low in price.

Description

technical field [0001] The invention relates to a water-melting salt-based zinc electrolyte, in particular to a water-melting salt-based zinc electrolyte and its application in secondary zinc batteries. Background technique [0002] The prevailing lithium-ion batteries and lead-acid batteries have long been troubled by resource scarcity, environmental pollution and potential dangers. In recent years, they have become more controversial. It is imperative to develop new low-cost and high-safety secondary batteries. Among them, the rechargeable zinc metal battery has the outstanding characteristics of inherent safety and high cost performance (rich in the earth's crust), so it has attracted much attention. Importantly, thanks to 2e - Electrochemical reaction, zinc metal battery is expected to achieve higher energy density (such as zinc metal electrode volumetric energy density is 5855mAh mL -1 ), so it is considered to be the leader in the "green secondary battery" era, with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38H01M2300/0002Y02E60/10Y02P70/50
Inventor 崔光磊赵井文杨武海杜晓璠
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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