Electrolyte and electrochemical device
An electrolyte and electrochemical technology, applied in the field of energy storage, can solve the problems of aggravated positive electrode structure damage and side reactions, unsatisfactory cycle capacity retention, and electrical performance deterioration
Active Publication Date: 2021-09-03
NINGDE AMPEREX TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, high energy density battery systems often encounter the problem of battery swelling
In addition, the increase in the upper limit voltage of the lithium cobalt oxide system positive electrode will aggravate the destruction of the positive electrode structure and increase the side reactions, resulting in unsatisfactory cycle capacity retention at high temperatures.
[0003] At present, the solution to the high-temperature cycle problem of lithium-ion batteries is mainly to optimize the electrolyte formula, but this often leads to the deterioration of other electrical properties (such as low-temperature discharge, high-rate charging, etc.)
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0098] The negative electrode can be prepared by a preparation method known in the art. For example, the negative electrode may be obtained by mixing an active material, a conductive material, and a binder in a solvent to prepare an active material composition, and coating the active material composition on a current collector. In some embodiments, the solvent may include water, etc., but is not limited thereto.
[0099] positive electrode
[0100] The material of the positive electrode used in the electrochemical device of the present application can be prepared using materials, configurations, and manufacturing methods known in the art. In some embodiments, the positive electrode of the present application can be prepared using the technique described in US9812739B, which is incorporated in this application by reference in its entirety.
[0101]In some embodiments, the positive electrode includes a current collector and a positive active material layer on the current colle...
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
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| surface tension | aaaaa | aaaaa |
| surface tension | aaaaa | aaaaa |
Login to View More
Abstract
The application provides an electrolyte and an electrochemical device, the electrolyte comprises the polymer shown in formula I, the surface tension of the electrolyte is 24 mN / m to 34 mN / m, the electrolyte solution It can significantly reduce the surface tension of the electrolyte, improve the wettability of the electrolyte to the separator, reduce the battery impedance, and improve the high temperature cycle capacity retention rate and cycle expansion.
Description
technical field [0001] The present application relates to the field of energy storage technology, in particular to an electrolyte and an electrochemical device containing the electrolyte. Background technique [0002] Electrochemical devices (e.g., lithium-ion batteries) have the advantages of being environmentally friendly, high operating voltage, large specific capacity, and long cycle life, and have been widely used as power sources in electronic products such as cameras, mobile phones, drones, laptops, and smart watches. . The main advantages of lithium-ion batteries include that the energy density can be greatly improved through the process design of positive and negative electrode materials. However, high energy density battery systems often encounter the problem of battery swelling. In addition, the increase in the upper limit voltage of the lithium cobalt oxide system positive electrode will aggravate the destruction of the positive electrode structure and increase...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0566H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/0566H01M10/0567H01M2220/30Y02E60/10
Inventor 王翔唐超崔辉郑建明
Owner NINGDE AMPEREX TECH