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

Anode materials for lithium battery of improved temperature performance

A technology for lithium-ion batteries and composite anodes, applied in battery electrodes, active material electrodes, negative electrodes, etc., can solve problems such as low energy density, low conductivity, and high processing costs

Inactive Publication Date: 2018-09-07
NANO & ADVANCED MATERIALS INST
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, due to its inherent low conductivity, low energy density, and high processing cost, this LTO anode still cannot be considered as an optimal choice for the electric LIB industry in large-scale / commercial applications.

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
  • Anode materials for lithium battery of improved temperature performance
  • Anode materials for lithium battery of improved temperature performance
  • Anode materials for lithium battery of improved temperature performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] As the anode material, graphite capped with 5% by weight LTO particles and with an average particle size of 10 μm, Super P as the conductive material, and polyvinylidene fluoride (PVDF) as the binder were used in a weight ratio of 90:5:5 After mixing, N-methylpyrrolidone (NMP) was added to the mixture to prepare a slurry. The slurry was stirred vigorously with an overhead stirrer for about 2 hours. The prepared anode slurry was coated on a copper current collector by a doctor blade to form a film, and then the film was dried in a vacuum oven at 90° C., thereby manufacturing an anode.

[0058] LiCoO as the cathode active material 2 , Super P as a conductive material and PVDF as a binder were mixed in a weight ratio of 94:3:3, and then the mixture was dispersed in N-methylpyrrolidone (NMP). The prepared dispersion liquid was coated on an aluminum foil by a doctor blade, and then dried in a vacuum oven at 90° C. to manufacture a cathode.

[0059]An electrode assembly wa...

Embodiment 2

[0061] To modify the surface of carbon-based material particles, graphite was added into a 65 wt% nitric acid bath, and then the slurry was stirred at 500 rpm for 24 hours using a magnetic stirrer. Finally, the carbon-based material particles in nitric acid were collected by filter paper, washed 3 times with deionized water, and then dried.

[0062] A secondary lithium battery was fabricated in the same manner as in Example 1, but using the carbon-based material particles pretreated with 65 wt% nitric acid mentioned in this paragraph as the anode material.

[0063] For any figure or range of values ​​for a given characteristic, a figure or parameter from one range can be combined with another figure or parameter from a different range of the same characteristic to produce a range of values.

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses composite anodes for a lithium ion battery containing carbon material core particles and a coating layer of LTO particles over the carbon material core particles, the coating layer of LTO particles at least partially covering the carbon material core particles. Also disclosed are anodes for a lithium ion battery containing activating treated surface modified carbon materialparticles, wherein at least one of an inorganic acid or an oxidizing agent is used to treat and modify the surface of the carbon material particles.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority to US Nonprovisional Patent Application No. 15 / 441,475, filed February 24, 2017, which is incorporated herein by reference in its entirety. technical field [0003] Disclosed is a surface modification technology for carbonaceous anode materials in lithium-ion batteries, which improves rate performance and safety at low and high temperatures. Background technique [0004] Lithium-ion batteries (LIBs) are widely used in various fields such as electronic devices, power tools, medical equipment, and electric vehicles. However, general LIBs have a relatively narrow operating temperature, which limits their applications in extreme environments. For vehicles and certain defensive applications, operating temperatures of -30°C or lower are required, but LIBs typically exhibit poor performance in this temperature range. Generally speaking, when the temperature drops to -20°C, bo...

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): H01M4/133H01M4/134H01M4/1393H01M4/1395H01M10/0525
CPCH01M4/133H01M4/134H01M4/1393H01M4/1395H01M10/0525H01M2004/028H01M4/04H01M4/587H01M4/366H01M4/485H01M2004/027Y02E60/10
Inventor 陈颂培徐业明蔡超何国强
Owner NANO & ADVANCED MATERIALS INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com