Aqueous zinc ion battery and positive electrode material

A zinc-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor stability, slow diffusion, low cycle life, etc., achieve stable performance, increase electrical conductivity, and enhance electrical conductivity Effect

Active Publication Date: 2021-08-17
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But inorganic materials also have obvious defects, such as manganese dioxide undergoes a significant phase transition (e.g., from an initial α-, β-, or γ-phase to a layered structure and subsequent structural collapse) during cycling, leading to exhibited very poor stability at high charge-discharge current densities, Mn 2+ Low cycle life due to dissolution in electrolyte and irreversible structural phase transition
Toxicity and cost of vanadium-based cathodes hinder further application in large-scale electrolytic processing
In addition, due to the Zn 2+ It is difficult to make breakthroughs in inorganic electrode materials due to slow diffusion in solid inorganic frameworks and limited capacity of inorganic electrode materials

Method used

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  • Aqueous zinc ion battery and positive electrode material
  • Aqueous zinc ion battery and positive electrode material
  • Aqueous zinc ion battery and positive electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1. Preparation of TTF-TCNQ complex:

[0040] Weigh TTF and TCNQ according to the mass ratio of 1:1; Pour the weighed TTF and TCNQ into different mortars respectively, dissolve them with appropriate amount of acetonitrile, and grind fully with the mortar at the same time, and grind the fully TTF and fully ground TCNQ are mixed together, and the two are fully ground again; vacuum filtration is performed with a vacuum filtration device, and after the suction filtration is completed, the material on the filter paper is put into a vacuum drying oven for drying, and the temperature is set at 60 ℃, the time is 720min.

[0041] 2. Preparation of positive electrode (TTF-TCNQ:SP:PTFE=6:3:1):

[0042] Weigh 30mg of TTF-TCNQ and pour it into a mortar; then weigh 15mg of SP (conductive carbon black) and pour it into a mortar, mix it with TTF-TCNQ with a pestle, grind it for about 20min, and use 10 Take about 8.33 mg of 60% PTFE with a microliter pipette gun and add it to the morta...

Embodiment 2

[0048] The difference between embodiment 2 and embodiment 1 is that TTF and TCNQ are weighed according to the mass ratio of 5:1.

Embodiment 3

[0050] The difference between embodiment 3 and embodiment 1 is that TTF and TCNQ are weighed according to the mass ratio of 1:5.

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Abstract

The invention discloses an aqueous zinc ion battery and a positive electrode material, and the positive electrode material is a compound of tetrathiafulvalene and 7, 7, 8, 8-tetracyano p-benzoquinone dimethane. According to the present invention, the compound (TTF-TCNQ) of tetrathiafulvalene and 7, 7, 8, 8-tetracyano-p-benzoquinone dimethane is creatively prepared as the positive electrode active material of the aqueous zinc ion battery, such that the aqueous zinc ion battery has characteristics of good cycle performance and high specific capacity.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a water system zinc ion battery and a positive electrode material. Background technique [0002] Currently, lithium-ion batteries occupy most of the market due to their high energy density and long cycle life. However, in recent years, the high cost and safety issues of lithium-ion batteries have gradually attracted people's attention. Therefore, developing an electrochemical energy storage device to replace Li-ion batteries has become a current research hotspot. Metal zinc has low cost, weight specific capacity (820mAhg -1 ), volume specific capacity (5855mAhcm -3 ), appropriate potential (-0.76V), high electrical conductivity, and low toxicity, it is an ideal negative electrode material. Compared with organic electrolytes, aqueous electrolytes have the advantages of high ionic conductivity, high power density, simple production conditions, and low c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M10/36
CPCH01M4/362H01M4/60H01M10/36Y02E60/10
Inventor 邓雯雯王淑婵
Owner SUZHOU UNIV OF SCI & TECH
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