Check patentability & draft patents in minutes with Patsnap Eureka AI!

Cathode active material and lithium-ion electrochemical system thereof

A cathode active material, ion technology, applied in the application field of the material in the lithium ion electrochemical system, can solve the problems of high price, rising cost and the like

Active Publication Date: 2020-05-15
MICROVAST POWER SYST CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost is significantly higher due to the high price of Co

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
  • Cathode active material and lithium-ion electrochemical system thereof
  • Cathode active material and lithium-ion electrochemical system thereof
  • Cathode active material and lithium-ion electrochemical system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In a 20L reactor, NiSO with a molar ratio of 85:12:3 4 , MnSO 4 and CoSO 4 The composed 2M metal sulfate solution was co-precipitated and pumped into the initial volume of 5L 0.1M ammonia water bubbled under a nitrogen tank at a rate of 0.5L / hr, and heated to 50°C. While adding metal sulfate, 1M Na 2 CO 3 The reactor was pumped to control the pH around 8, and a 9.6M aqueous ammonia solution was also pumped into the reactor at 0.03 L / hr. After the metal sulphate solution reactant has been completely added to the reactor. In the reactor, the mixture was collected by filtration and washed with copious amounts of water until a filter cake of metal carbonate was collected. metal carbonate Ni 0.85 co 0.03 mn 0.12 CO 3 (NMC85) was dried overnight at 100°C under nitrogen.

[0061] In order to prepare the positive electrode active material, lithium hydroxide monohydrate is used to prepare lithium hydroxide monohydrate and Ni 0.85 co 0.02 mn 0.13 CO 3 The precursors...

Embodiment 2

[0064] The precursor carbonate was prepared using the same procedure as in Example 1. Carbonate Ni 0.85 mn 0.12 co 0.03 CO 3(NMC) was calcined in air at 600°C for 6 hours. The obtained powder was mixed with LiOH·H 2 O was mixed in ethanol with a Li:(NMC) ratio of 1:1. The powder was mixed with a stir bar for 3 hours and then dried at 90°C. The dried mixture was heated at 550°C for 6 hours, cooled and reground, then heat treated again at 850°C for 18 hours.

[0065] Assuming that Ni has a valence of +2.75 in the layered structure of the composite, the composite can be expressed as 0.72(LiNi 0.841 mn 0.144 co 0.036 o 2 )*0.28(Li 0.53 Ni 0.47 o 0.74 ).

Embodiment 3

[0067] The same procedure as Example 2 was used, except that the Li:(NMC) ratio was 1.1:1.

[0068] Assuming that Ni has a valence of +2.60 in the layered structure of the composite, the composite can be expressed as 0.53(LiNi 0.85 mn 0.17 co 0.04 o 2 )*0.47(Li 0.61 Ni 0.39 o 0.69 ).

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 provides a cathode active material and a lithium-ion electrochemical system thereof. The formula of the cathode active material is xLiMO2*(1-x)(LiaM'1-a)Oy, M and M' independently comprises one or more metal ions; and after the metal ions are combined, the average oxidation state is 3+ or 2+, 1>x>0.5, 0.75>a>0, 1>y>0.625. The cathode active material is based on a rock salt structure,can meet the requirements of a lithium ion electrochemical system on a cathode active material on the premise that the cobalt content is low or even zero, and is suitable for large scale application.

Description

technical field [0001] The invention describes a positive electrode active material for a lithium ion battery and the application of the material in a lithium ion electrochemical system. Background technique [0002] Lithium-ion batteries were first commercialized in the early 1990s and have dominated the energy storage market for handheld electronic consumer devices. This is because it is rechargeable and has high mass and volumetric energy density. Currently, the application of lithium-ion batteries in electric vehicles is also being extensively studied. In the field of electric vehicles, the ideal battery cathode needs to have the characteristics of high capacity, high power, improved safety, long cycle life, low toxicity and low production cost. However, cathode materials generally cannot meet all these requirements. [0003] Especially for automotive applications, the ideal battery cathode needs to provide a high energy density for the battery. Nowadays, layered tra...

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
IPC IPC(8): H01M4/525H01M4/485H01M10/0525
CPCH01M4/525H01M4/485H01M10/0525H01M2004/028H01M4/505Y02E60/10
Inventor 布莱恩·托马斯·米本卡里玛·拉斯里张晓
Owner MICROVAST POWER SYST CO LTD
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