A lithium-rich positive electrode material/conductive flexible polymer composite material and its preparation method and application

A technology of lithium-rich positive electrode materials and flexible polymers, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as structural damage, uneven migration of lithium ions, and failure of electrode materials to pulverize, so as to improve electrochemical performance, Good environmental stability and the effect of relieving mechanical stress

A technology of lithium-rich positive electrode materials and flexible polymers, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as structural damage, uneven migration of lithium ions, and failure of electrode materials to pulverize, so as to improve electrochemical performance, Good environmental stability and the effect of relieving mechanical stress

CN106848240BActive Publication Date: 2019-12-20BEIJING UNIV OF TECH
4 Cites 0 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A lithium-rich positive electrode material/conductive flexible polymer composite material and its preparation method and application
  • A lithium-rich positive electrode material/conductive flexible polymer composite material and its preparation method and application
  • A lithium-rich positive electrode material/conductive flexible polymer composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First weigh 0.7Li 2 MnO 3 0.3LiFeO 2 Add 500mg powder of lithium-rich cathode material to 20mL distilled water / ethanol / ethylene glycol / nitromethylpyrrolidone 5:2:2:1 mixed solution, add Synde-146 (specifically, polymer dispersant containing amine anchoring groups, Zhuhai Xiande New Material Technology Co., Ltd.) 2 mL, ultrasonically dispersed for 60 min, transferred to a high-energy ball mill tank, added agate balls at a ball-to-material mass ratio of 10:1, and mechanically ball milled for 12 h at a speed of 360 r / min to obtain dispersion A.

[0029]Then, 0.05 g of the prepared polypyrrole nanowires was added to 20 mL of distilled water / ethanol / ethylene glycol / nitromethylpyrrolidone 5:2:2:1 mixed solution, and Synde-146 (specifically, amine-containing anchoring group Polymer dispersant, Zhuhai Xiande New Material Technology Co., Ltd.), ultrasonically dispersed for 60 minutes, moved into the high-energy ball mill tank, added agate balls with a ball-to-material mass rat...

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 lithium-rich cathode material / conductive and flexible polymer composite material, a preparation method and an application, and relates to the field of cathode materials for lithium ion batteries. A flexible and conductive polymer and a lithium-rich cathode material are weighed, marking ink is prepared, a dispersion liquid of acetylene black as a conductive additive is added for mixing, a flexible polymer matrix framework with supporting protection capacity is constructed for the lithium-rich cathode material with a novel ink-jet printing technology and a mechanical dispersion technology, the framework can relieve mechanical stress caused by volume expansion, and meanwhile, the polymer has conductive performance, so that the electrochemical performance of the composite material can be improved. The adopted technologies are low in cost, simple and feasible, and industrial preparation is realized easily.

Description

technical field [0001] The present invention relates to the field of positive electrode materials for lithium ion batteries, in particular to flexible polymer modified lithium-rich positive electrode materials {xLi 2 MnO 3 Β·(1-x)LiMO 2 The preparation method and application of (0<x<1)}. Background technique [0002] In order to meet the growing demand for miniaturization, diversity and variability of electronic products, flexible and wearable portable electronic products have become the trend of future development. Compared with traditional mobile electronic devices, flexible electronic devices can not only bend at will, but also realize specific functions by sensing changes such as stress. At present, the electrochemical devices powered by electronic products mainly include batteries and supercapacitors, which have high requirements on the flexible bending flexibility and mechanical deformation performance of the electrode materials. In order to meet the technical...

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
20 Dec 2019
Publication
CN106848240B
IPC
H01M4/36; H01M4/505; H01M4/525; H01M4/60; H01M10/0525
CPC
H01M4/362; H01M4/505; H01M4/525; H01M4/602; H01M10/0525; Y02E60/10
Inventors
θ΅΅η…œε¨Ÿ; 吕志