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Calcium-ion battery cathode material, cathode and calcium-ion battery

A technology of battery positive electrode and positive electrode material, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of limited energy density, low operating voltage, poor cycle performance and rate performance of calcium ion batteries, etc.

Active Publication Date: 2020-12-25
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cathode material for calcium ion batteries, aiming to solve the technical problems of the existing cathode materials for calcium ion batteries such as low working voltage and limited energy density
[0006] Another object of the present invention is to provide a calcium ion battery, which can solve technical problems such as poor cycle performance and rate performance of existing calcium ion batteries

Method used

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  • Calcium-ion battery cathode material, cathode and calcium-ion battery
  • Calcium-ion battery cathode material, cathode and calcium-ion battery
  • Calcium-ion battery cathode material, cathode and calcium-ion battery

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preparation example Construction

[0103] The preparation method of the calcium ion battery provided by the present invention is to assemble the positive electrode, negative electrode, diaphragm and electrolyte to obtain the calcium ion battery.

[0104] In some embodiments, the above-mentioned calcium ion battery can be prepared by the following method:

[0105] S1. Preparation of positive electrode: mix the positive electrode active material, positive electrode conductive agent and positive electrode binder in proportion to make a positive electrode material, coat the positive electrode material on the surface of the positive electrode current collector, cut it after drying, and obtain the required size positive electrode;

[0106] S2. Prepare the negative electrode: mix the negative electrode active material, negative electrode conductive agent and negative electrode binder in proportion to form a negative electrode material, coat the negative electrode material on the surface of the negative electrode curre...

Embodiment 1

[0113] A calcium ion battery comprises positive pole, negative pole, diaphragm and electrolyte, and its preparation method comprises the steps:

[0114] (1) Preparation of the positive electrode of the battery: 0.35g (accounting for 70% of the total mass of the positive electrode material) 2,4,6-tris(1H-pyrrole-1-substituted)-1,3,5-triazine, 0.1g conductive carbon Black, 0.05g polyvinylidene fluoride, mix and grind thoroughly, then add 2ml nitrogen methyl pyrrolidone, grind and mix well to obtain a slurry; then evenly scrape the slurry on the surface of aluminum foil (current collector) and dry it in vacuum at 80°C for 12h . Finally, use a cutting machine to cut the pole piece to the required size as the positive electrode of the battery;

[0115] (2) Preparation of battery negative electrode: Mix and grind 0.8g of expanded graphite, 0.1g of conductive carbon black, and 0.1g of polyvinylidene fluoride fully, then add 2ml of nitrogen methyl pyrrolidone, fully grind and mix to ...

Embodiment 2

[0120] This embodiment provides a calcium-ion battery, wherein the positive electrode active material is 2,4,6-tris(1H-imidazole-1-substituted)-1,3,5-triazine, and the others are the same as in Embodiment 1.

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a calcium ion battery positive electrode material, a positive electrode and a calcium ion battery. The calcium ion battery positive electrode material comprises a nitrogen-containing heterocyclic ring organic compound capable of allowing reversible intercalation / deintercalation of anions forming a calcium salt,the structural general formula of the compound is shown as a formula (I) and / or a formula (II), R1, R2 and R3 are heterocycles containing at least one heteroatom respectively, at least one heteroatomin the heteroatoms is an N atom, and R1, R2 and R3 are connected with the C atom on 1, 3, 5-triazine or a benzene ring through the N atom. The nitrogen-containing heterocyclic organic compound is stable in structure and can be subjected to redox reaction with anions in the solution in the charging and discharging process and has more excellent cycling stability and reversibility and solves the technical problems of limited types of positive electrode materials, non-ideal electrochemical performance, potential safety hazards and the like of the existing calcium ion battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a positive electrode material of a calcium ion battery, a positive electrode and a calcium ion battery. Background technique [0002] In recent years, as a rechargeable secondary battery, lithium-ion batteries have attracted widespread attention due to their high energy density, high operating voltage, light weight, and long cycle life. Many problems have been raised: Lithium resource reserves are very limited, and recycling is difficult, leading to rising costs; Lithium-ion batteries are prone to lithium dendrites during charging and discharging, resulting in short circuits and fires, and poor safety performance. Therefore, new energy storage technologies to replace lithium-ion batteries are needed. Among them, calcium-ion batteries, as new energy storage devices, have received extensive attention in recent years. Compared with lithium-ion batteries, calcium-ion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/137H01M10/054
CPCH01M4/137H01M4/60H01M10/054H01M2004/028Y02E60/10
Inventor 唐永炳韩承均张帆
Owner SHENZHEN INST OF ADVANCED TECH