Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Metal oxide cathode materials with improved performance

一种氧化物阴极、阴极材料的技术，应用在活性物质电极、化学/物理过程、化学/物理/物理化学过程等方向，能够解决材料额定容量低、容量损失大、方法太贵等问题

Pending Publication Date: 2007-09-26
FARASIS ENERGY
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While some success has been achieved, many of the approaches used are often too expensive, difficult to control, or difficult to implement on a large scale
These methods also result in large loss of capacity or low rated capacity of the material

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
  • Metal oxide cathode materials with improved performance
  • Metal oxide cathode materials with improved performance
  • Metal oxide cathode materials with improved performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using commercially available lithium-rich spinel Li 1.05 mn 1.95 o 4 powder as the base lithium manganese oxide spinel material. The base material was treated using a solid-state coating method as follows to produce a 2 final composite material. Weigh 95 grams of base manganese oxide spinel material into a 250 ml rolling mill container. Weigh 3.52 g LiNiO 3 and 14.86 g Co(NO 3 ) 2 Put into this 250 ml mill container with manganese oxide spinel. 50 ceramic mixing balls were placed in the mill container and the container was sealed. The container and its contents were placed on a Roll Mill apparatus and rolled for 12 hours. The rolled mixture was removed and immediately fired in air in a furnace at 700°C for 8 hours. The same material can also be prepared by the same solid-state method using acetate instead of nitrate.

[0022] For comparison, using two different wet-process methods with 5% LiCoO 2 The same base manganese oxide spinel material was modified. S...

Embodiment 2

[0025] Using commercially available LiMn 2 o 4 powder as the base lithium manganese oxide spinel material. The material was solid-state coated using the nitrate salt described in Example 1 to produce 2 final material composition.

Embodiment 3

[0027] Evaluation of LiMn of approximate composition in a coin cell (2032 size, 20 mm in size, 3.2 mm in height) using a lithium counter electrode 2 o 4 , Li 1.05 mn 1.95 o 4 and Li 1.16 mn 1.84 o 4 Standard spinel electrodes and electrodes coated with lithium cobalt oxide material by the method described in Example 1 and Example 2. Cell configuration: Li / 1 mol / L LiPF in 1:1 ethylene carbonate:diethyl carbonate 6 / cathode material. Use modified or unmodified spinel cathode material by preparing cathode material, acetylene black and polyvinylidene fluoride binder (90% / 4% / 6%) in N-methylpyrrolidone slurry materials to make electrodes. The slurry was coated on an aluminum foil current collector and dried under vacuum at 80 °C. Electrodes were punched from the coated side and used to make coin cells. Metal lithium foil was used as the counter electrode. Charge and discharge the button battery with a constant current in the voltage range of 3.2-4.25 volts. The cells w...

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 modified Li1+xMn2-x-yMyO4 (x is no less than 0 and no more than 0.5, y is no less than 0 and no more than 1) spinelle positive polar material for a non-water lithium battery and storage battery with improved cycle life and capacity, in particular to a method with low cost and high efficiency for providing the galaxite cathode material with protective coating or local coating through using a lithium and / or transition metal contained substance to dispose the galaxite cathode material, a cathode material made by the method and a lithium ion battery made from the cathode material. The method comprises the steps of: providing powder lithium transition metal oxide cathode material; mixing the powder lithium transition metal oxide cathode material with metal salt of a transition metal oxide surface treatment phase without adding liquid phase; burning the mixture to form the transition metal oxide surface treatment phase without drying in advance.

Description

technical field [0001] The present invention relates to a method for efficiently and uniformly coating lithium metal oxide cathode materials to enhance the performance of lithium-ion batteries. More specifically, the present invention relates to a method of coating lithium manganese oxide spinel with a second lithium-containing metal oxide phase using dry blending and secondary firing to prepare Methods and specific procedures for materials with longer cycle life. Background technique [0002] Lithium-ion batteries have become very attractive for portable electronic devices such as cell phones and laptops because they offer higher energy density than other charging systems. Current commercial Li-ion batteries have lithiated carbon anodes or anodes Li x C 6 , and lithium cobalt oxide cathode or cathode LiCoO 2 . During battery charge and discharge, lithium ions are passed back and forth between the anode and cathode and become embedded in the host structure. The most co...

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): H01M4/04H01M4/48H01M4/58C01G1/02B22F1/02B01J19/00H01M10/40H01M4/02H01M4/131H01M4/1391H01M4/50H01M4/505H01M4/52H01M4/525H01M10/052H01M10/36
CPCH01M4/505Y02E60/122H01M2004/028H01M4/525H01M4/131H01M10/052H01M4/1391Y02E60/10
Inventor K·D·开普勒王瑀刘宏建
Owner FARASIS ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com