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

Glass negative electrode material as well as preparation method and application thereof

A technology of negative electrode material and glass, applied in the field of glass negative electrode material and its preparation, can solve the problems of improper component type and content and heat treatment method, inability to improve the performance of electrode material, low specific capacity and limited application of VT glass, etc. The effect of improving electrochemical performance, improving cycle stability, and facilitating preparation

Active Publication Date: 2022-02-18
HAINAN UNIVERSITY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But the low specific capacity limits the application of VT glass in lithium-ion batteries
Carbon coating, ball milling, and crystallization are often used to improve the specific capacity and cycle stability of glass materials. However, these methods are costly, time-consuming, and have little room for performance improvement.
The improvement of performance through doping is often unable to improve the performance of electrode materials due to the type and content of the added components and improper heat treatment methods.

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
  • Glass negative electrode material as well as preparation method and application thereof
  • Glass negative electrode material as well as preparation method and application thereof
  • Glass negative electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The present invention provides a method for preparing the glass negative electrode material described in the above technical solution, comprising:

[0038] mixing tricobalt tetroxide, titanium oxide, tantalum oxide, zinc oxide, vanadium pentoxide and tellurium dioxide to obtain a mixture;

[0039] melting the mixture to obtain a melt;

[0040] The molten material is shaped to obtain a glass negative electrode material.

[0041] In the present invention, the dosage ratios of the tricobalt tetroxide, titanium oxide, tantalum oxide, zinc oxide, vanadium pentoxide and tellurium dioxide are consistent with those described in the above technical solution.

[0042] In the present invention, the mixing is preferably multiple times of sieving and mixing evenly.

[0043] In the present invention, the melting is preferably performed in a quartz boat.

[0044] In the present invention, the melting temperature is preferably 1000-2000°C, more preferably 1200-1800°C, more preferabl...

Embodiment 1～4

[0076] According to the process parameters in Table 1 and Co in Table 2 3 o 4 ,TiO 2 , Ta 2 o 5 , ZnO, V 2 o 5 and TeO 2 Raw material ratio, the glass material is prepared;

[0077] The molten glass (melt) is poured on a brass plate, and then another brass plate is used to quickly squeeze the molten glass to form it quickly to obtain vanadium-tellurium-based multi-element glass flakes. Thin flake glass (vanadium-tellurium-based multi-element glass flake) is crushed and then ball-milled to obtain glass powder (glass negative electrode material) for lithium-ion battery negative electrode materials.

[0078] The glass material prepared above is used as the negative electrode active material of the lithium ion battery.

[0079] Mix the glass powder prepared in the example, acetylene black and polyvinylidene fluoride (PVDF) according to the mass ratio of 8:2:1, grind them thoroughly, drop in an appropriate amount of N-methylpyrrolidone, and perform magnetic stirring for 24-...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a glass negative electrode material, which is prepared from the following raw materials in parts by weight: 0.1 to 50 parts of Co3O4; 5 to 60 parts of TiO2; 1 to 60 parts of Ta2O5; 15 to 60 parts of ZnO; 3 to 60 parts of V2O5; and 10 to 40 parts of TeO2. In order to solve the problems of low first cycle specific capacity, low conductivity and poor cycle stability of a vanadium tellurium glass material as a lithium ion electrode material, transition metal oxides cobalt oxide and zinc oxide with high specific capacity and titanium oxide with strong electron transport property are added to improve the capacity and cycle stability of the vanadium tellurium glass material. The invention provides a glass material with high first-circle specific capacity and good cycling stability. The invention also provides a preparation method and application of the glass negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a glass negative electrode material and a preparation method and application thereof. Background technique [0002] Vanadium based oxide V 2 o 5 It is a typical layered structure, lithium ions can be freely intercalated between layers, and V ions have multiple valence states, good chemical and electrochemical properties, V 2 o 5 Low cost and easy preparation have attracted widespread attention. But V 2 o 5 The interlayers are connected by van der Waals force, and the bonding force between the layers is weak. During the long-term charging and discharging process, the structural phase change caused by the intercalation / deintercalation of lithium ions will cause the electrode structure to collapse. Compared with crystalline electrode materials, amorphous electrode materials are considered to be electrode materials with great potential due to their ope...

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 Applications(China)
IPC IPC(8): C03C3/12H01M4/48H01M4/525H01M10/0525
CPCC03C3/127H01M10/0525H01M4/48H01M4/525Y02E60/10
Inventor 李长久梁雪孔凡厚饶寅朝易兰林张瑞翔
Owner HAINAN UNIVERSITY