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

A method of coating lithium-rich manganese-based positive electrode materials by sol-gel method

A sol-gel method, lithium-rich manganese-based technology, applied in the direction of positive electrodes, battery electrodes, active material electrodes, etc., can solve the problems of high energy consumption and low energy consumption of coating technology

Active Publication Date: 2022-05-13
WANXIANG 123 CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of high energy consumption of manganese phosphate coating of lithium-rich manganese-based materials by spray drying, the present invention provides a method for coating lithium-rich manganese-based positive electrode materials by using a sol-gel method. The coating technology can The consumption is low, and by studying the influence of the coating concentration of LMP on the electrochemical performance of LMCN, a better coating concentration range is obtained

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
  • A method of coating lithium-rich manganese-based positive electrode materials by sol-gel method
  • A method of coating lithium-rich manganese-based positive electrode materials by sol-gel method
  • A method of coating lithium-rich manganese-based positive electrode materials by sol-gel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for coating a lithium-rich manganese-based positive electrode material by a sol-gel method, comprising the following steps:

[0037]1) The precursor of lithium-rich manganese-based cathode materials was prepared by co-precipitation method: Mn(CH 3 COO) 2 4H 2 O (AR 99.0%), Co (CH 3 COO) 2 4H 2 O (AR 99.0%), Ni (CH 3 COO) 2 4H 2 O (AR99.0%) and dissolved in distilled water, configured to a concentration of 2mol L -1 Mixed metal salt solution A, and configure 5mol L at the same time -1 Dissolve NaOH (AR 96.0%) in distilled water, and add a certain amount of NH after cooling 3 ·H 2 O was formulated as solution B. Before starting the experiment, inject 1L of distilled water into the co-precipitation reactor, control the system temperature at 50°C, and use NH 3 ·H 2 O adjusted the pH to 11.2, passed Ar, half an hour later, using a peristaltic pump to inject solutions A and B into the reactor at the same time, the pH was controlled to be 11.2, the rotati...

Embodiment 2

[0041] A method for coating a lithium-rich manganese-based positive electrode material using a sol-gel method, the difference from Example 1 is that the coating concentration of LMP in the LMP-LMCN is 3%wt, hereinafter referred to as LMP3-LMCN.

Embodiment 3

[0043] A method for coating a lithium-rich manganese-based positive electrode material using a sol-gel method, the difference from Example 1 is that the coating concentration of LMP in the LMP-LMCN is 5%wt, hereinafter referred to as LMP5-LMCN.

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
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of battery material preparation. Aiming at the problem of high energy consumption of manganese phosphate coating on lithium-rich manganese-based materials by spray drying, a method for coating lithium-rich manganese-based positive electrode materials by sol-gel method is provided. The method comprises the following steps: 1) preparing a lithium-rich manganese-based cathode material precursor by coprecipitation; 2) combining the precursor with Li 2 CO 3 Ball milling to mix evenly, calcining, and cooling to obtain lithium-rich manganese-based positive electrode material LMCN; 3) Sol-gel method to prepare lithium manganese phosphate modified lithium-rich manganese composite material LMP‑LMCN. The coating technology of the present invention has low energy consumption, and by studying the effect of the coating concentration of LMP on the electrochemical performance of LMCN, a better range of coating concentration is obtained.

Description

technical field [0001] The invention relates to the technical field of battery material preparation, in particular to a method for coating a lithium-rich manganese-based positive electrode material by a sol-gel method. Background technique [0002] A large amount of manganese is used in lithium-rich manganese-based cathode materials, and LiCoO 2 Compared with ternary materials, it is not only low in price, but also safe and environmentally friendly. Therefore, lithium-rich manganese-based cathode materials are considered to be ideal for the next generation of lithium-ion battery cathode materials. However, lithium-rich manganese-based materials are still unsatisfactory: first-time efficiency, rate performance, cycle stability, and gradual voltage decay during cycling, etc., these factors largely limit lithium-rich manganese-based cathode materials. The commercialization of lithium-rich manganese-based materials is difficult to be immediately applied to industrial production...

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): H01M4/62H01M4/505H01M4/525H01M10/0525
CPCH01M4/628H01M4/505H01M4/525H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 肖彪彪韩健峰陈瑶许梦清
Owner WANXIANG 123 CO LTD