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

Negative pole piece and electrochemical battery

A technology of negative pole piece and positive pole piece, which is applied in the field of electrochemical cells to achieve the effects of improving cycle performance, improving safety performance and inhibiting decomposition

Inactive Publication Date: 2019-11-05
GREE ELECTRIC APPLIANCES INC
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the problem of lithium dendrite deposition on the surface of the negative electrode, and provide a negative electrode sheet and an electrochemical battery that can reduce the problems of battery short circuit and local overheating.

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
  • Negative pole piece and electrochemical battery
  • Negative pole piece and electrochemical battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] (101) Provide positive electrode active material (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ), binder (polyvinylidene fluoride, PVDF), conductive agent 1 (SP), conductive agent 2 (carbon nanotubes), the contents of which are respectively 96%, 1.3%, 2%, 0.7% of the total solid mass;

[0057] (102) Add each substance in step (101) to the solvent N-methylpyrrolidone, mix and stir to prepare a positive electrode material slurry, with a solid content of 60%;

[0058] (103) Coating the positive electrode material slurry obtained in (102) on an aluminum foil current collector (thickness 16 μm) to prepare a positive electrode piece.

[0059] (201) Provide negative active material graphite, binder (styrene butadiene rubber, SBR), conductive agent 1 (SP), conductive agent 2 (carbon nanotubes), thickener (sodium carboxymethyl cellulose, CMC), Its content is 89.1%, 2.8%, 1.3%, 0.7%, 1.1%, 5% of the total solid mass;

[0060] (202) Add the substances in step (201) to solvent deionized water, mix and stir ...

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
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a negative pole piece. The negative pole piece comprises a negative current collector, a negative pole material layer and a niobium-titanium oxide layer which are arranged in alaminated manner, wherein the negative pole material layer is arranged between the negative current collector and the niobium-titanium oxide layer, the niobium-titanium oxide layer contains niobium-titanium oxide, and the mass percentage of the niobium-titanium oxide in the niobium-titanium oxide layer ranges between 70% and 90%. The invention further provides an electrochemical battery.

Description

Technical field [0001] The invention relates to the field of electrochemical batteries, in particular to a negative pole piece and an electrochemical battery. Background technique [0002] Today, people’s demand for pure electric vehicles and electronic products is increasing day by day. The new generation of electrochemical batteries represented by lithium-ion batteries has high energy density, high power density and long cycle life compared with traditional nickel-cadmium batteries and nickel-hydrogen batteries. Gaining importance. [0003] Traditional lithium-ion batteries use carbon-based materials as their anode materials. The carbon-based materials themselves are a mixed conductor of ionic electrons and have low charge and discharge voltages. They are currently found materials with better overall electrochemical performance. Carbon-based anode materials tend to cause lithium dendrites to deposit on their surface during overcharging and high-current charging, and lithium dend...

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): H01M4/133H01M10/42H01M10/0525
CPCH01M4/133H01M10/0525H01M10/4235Y02E60/10
Inventor 吴西燚魏文飞曾梦丝李雪云邹十美
Owner GREE ELECTRIC APPLIANCES INC