Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for improving the electrochemical performance of anion intercalation electrode materials

An electrode material and anion technology, applied in the field of improving the electrochemical performance of anion-embedded electrode materials, can solve the problems of unfavorable battery portability, miniaturization development, reduction of actual loading of active materials, reduction of volumetric energy density, etc., so as to improve cycle stability. performance, improved magnification performance, and the effect of less usage

Active Publication Date: 2021-04-20
HUAZHONG UNIV OF SCI & TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will undoubtedly reduce the actual loading capacity of active materials, resulting in a significant reduction in volumetric energy density, which is not conducive to the development of portable and miniaturized batteries.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for improving the electrochemical performance of anion intercalation electrode materials
  • A method for improving the electrochemical performance of anion intercalation electrode materials
  • A method for improving the electrochemical performance of anion intercalation electrode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Based on the organic positive electrode material with reversible intercalation / extraction of perchlorate anion, the method of the present invention is used to improve its electrochemical performance, and it is necessary to prepare a covalent organic framework compound containing perchlorate anion. The specific process is as follows:

[0042] Preparation of additives:

[0043] Add 42 mg of 1,3,5-triformylphloroglucinol and 118 mg of ethidium bromide into a 15 mL quartz tube, then add 2 mL of a mixed solution of dioxane and mesitylene (volume ratio 1:1), 0.2mL 6.0mol / L acetic acid solution. The quartz tube was cooled with liquid nitrogen, evacuated, and degassed. After repeating three times, the quartz tube was sealed and reacted in an oven at 120° C. for three days. After the reaction was completed, the quartz tube was taken out, cooled to room temperature, and the seal was broken to obtain a deep red precipitate, which was filtered with suction, and the filter cake wa...

Embodiment 2

[0047] When adding a small amount of specific additives, such as 1%, the performance of the battery is also improved. At this time, the battery assembly method is similar to that of Embodiment 1. Such as Figure 5 It is shown that the performance of the battery can also be improved when the proportion of certain kinds of additives is 1.0%. The stable discharge capacity is 94mAh / g at a current density of 100mA / g, and the average discharge voltage and coulombic efficiency are the same as in Example 1. In terms of cycle stability, after 200 cycles, the specific capacity of the battery decays to 60mAh / g.

[0048] In addition, gradually increasing the proportion of specific types of additives, when it reaches 10%, can obtain better effects; and, when the amount of specific types of additives is further increased, the effect remains basically unchanged. Considering that too many additives affect the energy density and cost factors of the battery, a small amount of specific additi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of battery technology, and discloses a method for improving the electrochemical performance of anion-intercalated electrode materials. The specific method is to add a specific type of additive to the anion-intercalated electrode material; the specific type of additive has a cationic center covalent organic framework compounds. Compared with the existing technology, this method does not follow the traditional strategy of changing the material itself, improving the conductivity of the material, and improving the conductive additive, but by adding a covalent organic framework compound with a cationic center as a specific type of additive, based on the charge Coulomb attraction is used to adjust the transport of anions and improve the ionic conductivity of anions, so it can greatly improve the electrochemical performance of anion intercalation electrode materials. The method can be used to improve the performance of lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, aluminum-ion batteries, magnesium-ion batteries, zinc-ion batteries and dual-ion batteries based on the anion intercalation type.

Description

technical field [0001] The invention belongs to the technical field of batteries, and more specifically relates to a method for improving the electrochemical performance of anion-embedded electrode materials. Background technique [0002] With the rapid development of portable electronic devices and the popularity of electric vehicles, people's demand for energy storage is increasing day by day. At present, lithium-ion batteries, as the main energy storage devices, are developing rapidly. Commercial lithium-ion batteries mostly use inorganic materials containing transition metal oxides as lithium storage positive electrodes, and their preparation, synthesis and recovery processes are complex; materials usually require pre-lithiation treatment during the preparation process, such as obtaining lithium cobaltate, manganate Lithium, lithium nickelate, lithium iron phosphate, and binary or ternary positive electrodes, etc., these pre-lithiated materials delithiate during chargin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/054
CPCH01M4/624H01M10/0525H01M10/054Y02E60/10
Inventor 王成亮唐蜜姜澄刘视远吴艳超陈远卓树铭梁心怡
Owner HUAZHONG UNIV OF SCI & TECH