Preparation method and application of high-stability zinc-iodine battery and electrode material

An electrode material, battery cathode technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of reduced capacity and coulombic efficiency, hinder development and application, etc., to improve poor cyclability, reduce solubility, and high specific surface area. Effect

Active Publication Date: 2021-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the redox reaction and shuttling effect of I3- / I- ions in the positive electrode of zinc-iodine batteries usually lead to a gradual decrease in capacity and coulombic efficiency during cycling, which seriously hinders its further development and application.

Method used

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  • Preparation method and application of high-stability zinc-iodine battery and electrode material
  • Preparation method and application of high-stability zinc-iodine battery and electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A highly stable zinc-iodine battery and its preparation method and application, comprising the following steps:

[0041] (1) Preparation of covalent organic framework compound: the covalent organic framework compound of the composite material is polyimide covalent organic framework compound COF-LZU1.

[0042] 0.30 mmol of 1,3,5-triformylbenzene and 0.45 mmol of 1,4-diaminobenzene were dissolved in 3 mL of 1,4-dioxane, and then 0.6 mL of 3 mol L-1 dilute acetic acid was added to the mixture , stirred on a magnetic stirrer for 5 days, and then the obtained product was washed with dimethylformamide and tetrahydrofuran in a centrifuge at 2000r / min for 3 times, and then the powder was kept in a vacuum oven at 80 degrees Celsius for 12 hours, and dried , that is, COF-LZU1 powder.

[0043] The active material was mixed with conductive carbon black and PVDF binder at a ratio of 6:2:2 for 12 hours, then coated on carbon paper, kept in a vacuum oven at 40 degrees Celsius for 24 ...

Embodiment 2

[0048] A highly stable zinc-iodine battery and its preparation method and application, comprising the following steps:

[0049] (1) Preparation of covalent organic framework compound: the covalent organic framework compound of the composite material is polyimide covalent organic framework compound COF-LZU1, and the steps are as described in Example 1.

[0050] (2) After grinding the elemental iodine with a mortar, weigh 0.1g elemental iodine powder, grind it evenly with 0.1g COF-LZU1 powder, then put it into a tube furnace, and raise the temperature at a constant heating rate of 2°C / min to 80 degrees Celsius, under the protection of argon for 12 hours, the COF-LZU1 zinc-iodine battery positive electrode loaded with iodine is obtained.

[0051] The active material and MXene colloidal solution are mixed evenly in a ratio of 1:1, filtered, and kept in a vacuum oven at 40 degrees Celsius for 24 hours, and dried to obtain a positive electrode sheet, in which MXene acts as a conduct...

Embodiment 3

[0054] A highly stable zinc-iodine battery and its preparation method and application, comprising the following steps:

[0055] (1) Preparation of covalent organic framework compound: the covalent organic framework compound of the composite material is polyimide covalent organic framework compound COF-LZU1, and the steps are as described in Example 1.

[0056] (2) After grinding the iodine element with a mortar, weigh 0.1g of zinc iodide powder, grind it with 0.1g of COF-LZU1 powder evenly, then put it into a tube furnace, and raise the temperature at a constant heating rate of 2°C / min To 80 degrees Celsius, under the protection of argon for 12 hours, the COF-LZU1 zinc iodide loaded zinc iodide battery cathode active material is obtained.

[0057] (3) The active material and the MXene colloidal solution are mixed evenly in a ratio of 1:1, filtered, and kept in a vacuum oven at 40 degrees Celsius for 24 hours, and dried to obtain a positive electrode sheet, in which MXene acts ...

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Abstract

The invention relates to a preparation method and application of a high-stability zinc-iodine battery and an electrode material. The electrode material comprises a covalent organic framework compound and active iodine, wherein the active iodine is loaded in a pore structure formed by the covalent organic framework compound. The preparation method comprises the steps of mixing the covalent organic framework compound with active iodine, and carrying out heating treatment in a tubular furnace to obtain the composite material. The iodine positive electrode is effectively stabilized, and the electrochemical performance of the zinc-iodine battery is improved. The material has good electrochemical performance, and has the characteristics of good capacity and Coulombic efficiency retention in the cycle process.

Description

technical field [0001] The invention belongs to the technical field of battery cathode material iodine, and in particular relates to a preparation method and application of a highly stable zinc-iodine battery and electrode material. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of microelectronic information technology, the demand for digital electronic products, electric tools, electric vehicles, and large-scale energy storage is increasing. Based on the current urgent demand for green, efficient, and practical energy storage materials, high-performance and large-capacity The development of rechargeable and dischargeable batteries for seconda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/38H01M4/02H01M10/36
CPCH01M4/388H01M4/628H01M4/02H01M10/365H01M2004/028H01M2004/021Y02E60/10
Inventor 冯金奎田园安永灵
Owner SHANDONG UNIV
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