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

Method for improving chemical property of negative pole material SnS2 of lithium ion battery

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, electrode manufacturing, circuits, etc., can solve problems such as poor charge-discharge cycle performance, and achieve the effects of easy control of process conditions, improved electrochemical performance, and high specific capacity

Inactive Publication Date: 2011-04-27
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, one of the main problems encountered by this material as the negative electrode material of lithium-ion batteries is that the charge-discharge cycle performance is not good. Some researchers have modified the material, such as adding conductive agents, reducing the particle size of the material, etc., in order to improve The cycle stability, charge and discharge capacity and other electrochemical properties of this negative electrode material are currently in the research and exploration of new processes and new 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
  • Method for improving chemical property of negative pole material SnS2 of lithium ion battery
  • Method for improving chemical property of negative pole material SnS2 of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] (1) Weigh 0.62g of SnS 2 The material and 0.21g of carbon nanotubes are uniformly mixed in a mortar and put into a ball mill jar;

[0018] (2) Add 10ml of N-methylpyrrolidone and 0.17g of PVDF into the ball mill jar, and put 8.68g of balls into it;

[0019] (3) Press the ball mill tank tightly, put it into the ball mill, set the ball mill rotation speed to 350rpm, the ball mill time to 4h, pause every 30 minutes for 15 minutes, and perform wet milling and compounding to obtain slurry-like carbon-doped composite SnS 2 Material.

[0020] Carbon-doped composite SnS 2 The material is directly smeared on the copper foil to prepare an electrode sheet. With the pole piece as the working electrode, metal lithium as the counter electrode, 1mol / L LiF 6 / EC-DMC (volume ratio 1:1) was used as the electrolyte, and a simulated battery was assembled in an argon atmosphere glove box. Carry out charge and discharge test on the simulated battery, the voltage range is 0~2.5V (vs. Li ...

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

No PUM Login to View More

Abstract

The invention relates to a method for improving chemical property of a negative pole material SnS2 of a lithium ion battery, belonging to the technical field of a high-energy battery. In the method, a wet-milling technique is adopted for carbon-doped compounding the SnS2 material+ADs- a polyvinylidene fluoride (PVDF) is taken as an agglomerant, and an N-methylpyrrolidone is taken as a solvent+ADs- the SnS2 material and a carbon nano tube are compounded with each other in a ball-milling tank, so that a slurry material containing SnS2 active substance can be obtained+ADs- furthermore, the modified SnS2 is taken as the negative pole material of the lithium ion battery. The method has simple and easy process flow, easily controls the technique conditions, improves the electrochemical property of the SnS2 composite material in the application of the negative pole material of the lithium ion battery, and exhibits higher specific capacity and better circulating performance.

Description

technical field [0001] The invention relates to a method of improving lithium-ion battery negative electrode material SnS 2 The method for electrochemical performance belongs to the technical field of high-energy batteries. Background technique [0002] Lithium-ion batteries are widely used in electronic products at this stage of power supply equipment. In the continuous research and development, the application requirements in electric vehicles, aerospace and energy storage are gradually increasing. In order to meet the demand for high-performance lithium-ion batteries, research on positive and negative electrode materials and separators of lithium-ion batteries has gradually increased in recent years, and the development of high-performance negative electrode materials has also become one of the focuses of research in this field. extensive attention. [0003] Tin sulfide anode material is one of the tin-based composite materials. It has high electrochemical charge and di...

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): H01M4/04H01M4/58
CPCY02E60/12Y02E60/10
Inventor 吴锋穆道斌陈实吴伯荣万婷王敬杨凯
Owner BEIJING INSTITUTE OF TECHNOLOGYGY