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A kind of zinc ion battery formation method

A technology of zinc ion battery and chemical formation method, which is applied in secondary batteries, electrochemical generators, secondary battery repair/maintenance, etc., and can solve problems such as insufficient cycle performance, limited battery comprehensive performance, and low specific energy of positive electrode materials. Achieve the effect of reducing production cost, good protection effect, and improving discharge specific capacity

Active Publication Date: 2022-06-24
浙江金羽新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN113948779A discloses a zinc ion battery containing an electrolyte additive, which can form a protective film on the surface of the positive electrode material to prevent the dissolution of the manganese oxide material, thereby prolonging the service life of the battery. However, the ratio of the positive electrode material used in this patent is Low energy limits the overall performance of the battery
On the other hand, low-valence manganese oxide, as a positive electrode material with high specific capacity, has insufficient cycle performance.

Method used

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  • A kind of zinc ion battery formation method
  • A kind of zinc ion battery formation method
  • A kind of zinc ion battery formation method

Examples

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Effect test

Embodiment 1

[0059] A zinc ion battery includes a positive electrode sheet, a negative electrode sheet and a separator; the positive electrode sheet includes a positive electrode active material and an inorganic protective layer, and the inorganic protective layer is attached to the positive electrode active material; the positive electrode active material includes manganese oxide, The inorganic protective layer includes water-insoluble zinc salt; the negative electrode plate includes pure zinc or zinc alloy; the diaphragm includes glass fiber film, PE film, hydrophilic PP film, hydrophilic composite film, non-woven fabric, composite ceramic One of the diaphragms.

[0060] Further, the manganese oxide is a manganese oxide whose valence state is not greater than +4, including one or one of manganese monoxide, manganese dioxide, manganese tetroxide, zinc manganate, sodium manganate, and potassium manganate. The water-insoluble zinc salt includes one or more of zinc phosphate, zinc molybdate,...

Embodiment 2

[0063] A chemical synthesis method of a zinc-ion battery. The zinc-ion battery undergoes three formations before use; each formation includes cyclic charge and discharge, and the number of cycles is 1 to 5 cycles, preferably 1 to 2 cycles, and specifically includes the following steps:

[0064] S1: the positive electrode sheet, the negative electrode sheet and the diaphragm are assembled and then immersed in the electrolyte A for the first and second chemical formation; the electrolyte A includes an electrolyte salt, a solvent and an acidic substance;

[0065] The positive active material includes manganese oxides with a valence state not greater than +4, including one of manganese monoxide, manganese dioxide, trimanganese dioxide, trimanganese tetroxide, zinc manganate, sodium manganate, and potassium manganate. one or more; the negative electrode sheet includes pure zinc or zinc alloy; the diaphragm includes one of glass fiber membrane, PE membrane, hydrophilic PP membrane, ...

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Abstract

The invention provides a method for forming a zinc ion battery. The zinc ion battery includes a positive electrode sheet, a negative electrode sheet and a diaphragm, and undergoes three formations before use, and each formation includes cycle charging and discharging. The zinc ion battery uses an electrolyte solution containing an acidic substance in the process of the first formation and the second formation, and uses an electrolyte solution containing an additive in the third formation. The additive has the ability to form an inorganic substance on the surface of the positive electrode active material. The function of the protective layer. The zinc ion battery obtained by the chemical formation method has the characteristics of high specific capacity, good stability of active materials, high capacity and long life.

Description

technical field [0001] The invention relates to the technical field of zinc ion batteries, in particular to a zinc ion battery and a chemical synthesis method thereof. Background technique [0002] The development of aqueous secondary batteries is crucial for optimal energy management and large-scale storage. with MnO 2 The manganese-based compound cathode represented by it is considered to be one of the most promising aqueous battery materials at present. Aqueous manganese-based zinc-ion batteries use manganese-based oxides as battery positive electrodes, zinc-based materials as battery negative electrodes, and contain Zn 2+ As an electrolyte, the neutral or slightly acidic aqueous solution has the advantages of high energy density, high power density, good rate performance, low cost, and environmental friendliness. [0003] Patent CN113948779A discloses a zinc ion battery containing electrolyte additives, which can form a protective film on the surface of the positive e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H01M10/36
CPCH01M10/446H01M10/36
Inventor 黄杜斌刘兴坤王春源何鑫魏海旭栾宇杨扬李爱军
Owner 浙江金羽新能源科技有限公司