Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrolyte and electrochemical device

An electrolyte and compound technology, applied in electrochemical generators, electrolytes, organic electrolytes, etc., can solve the problems of cycle performance and storage performance to be improved, and achieve improved electrochemical performance, good low-temperature performance and high-temperature performance, and film formation. good effect

Active Publication Date: 2019-10-29
CONTEMPORARY AMPEREX TECH CO
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the above-mentioned electrolyte system. For example, under high voltage and high temperature conditions, the cycle performance and storage performance of the above-mentioned electrolyte system need to be improved.

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
  • Electrolyte and electrochemical device
  • Electrolyte and electrochemical device
  • Electrolyte and electrochemical device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0108] (2) Preparation of the compound shown in formula I-2:

[0109] The reaction equation is:

[0110]

[0111] The specific preparation process is:

[0112] Mix anhydrous sodium carbonate, raw material P-4 and raw material P-3 in absolute ethanol, react and stir for 2h to 5h; wash with hot ethanol several times to obtain the crude product, and recrystallize to obtain the compound shown in formula I-2.

[0113] (3) Preparation of the compound shown in formula I-3:

[0114] The reaction equation is:

[0115]

[0116] The specific preparation process is:

[0117] Mix anhydrous sodium carbonate, raw materials P-5 and raw materials P-3 in absolute ethanol, react and stir for 2h to 5h; wash with hot ethanol several times to obtain a crude product, and recrystallize to obtain the compound shown in formula I-3.

[0118] The electrochemical device according to the second aspect of the present application will be described below.

[0119] The electrochemical device accordi...

Embodiment 1

[0172] Examples 1-12 are the effects of the mutual coordination of additives A and B in different proportions on the performance of lithium-ion secondary batteries. It can be seen from Example 1 that when the amount of additive A added is small and the amount of additive B added is large, the cycle performance of the lithium-ion secondary battery deteriorates, and the problem of gas production is improved to a certain extent, but the improvement effect is not great. The reason is: when the additive A is added in a small amount, the protective effect of the additive A on the positive electrode active material is not obvious, while the additive B is added in a large amount, and the aluminum foil is strongly corroded under the condition of high voltage, resulting in the deterioration of the cycle performance . With the increase of Additive A and the decrease of Additive B, the synergistic advantages of Additive A and Additive B on lithium-ion secondary batteries are gradually man...

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
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The invention provides an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B; the mass percentage content of the additive A in the electrolyte is 0.001-10%, and the mass percentage content of the additive B in the electrolyte is 0.1-10%; and the conductivity of the electrolyte at 25 DEG C is 4 mS / cm - 12 mS / cm. The cycle performance and storage performance of the electrochemical device can be enhanced, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage can be increased,and low temperature performance can also be considered.

Description

technical field [0001] The present application relates to the field of energy storage materials, in particular, to an electrolyte and an electrochemical device. Background technique [0002] Lithium-ion secondary batteries are widely used in electric vehicles and consumer electronics products due to their advantages such as high energy density, high output power, long cycle life and low environmental pollution. The current demand for lithium-ion secondary batteries is: high voltage, high power, long cycle life, long storage life and excellent safety performance. [0003] Lithium-ion secondary batteries currently widely use an electrolyte system in which lithium hexafluorophosphate is used as a conductive lithium salt and cyclic carbonate and / or chain carbonate is used as an organic solvent. However, there are still many deficiencies in the above-mentioned electrolyte system, for example, under the condition of high voltage and high temperature, the cycle performance and sto...

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): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2300/0025H01M10/0568H01M10/0569Y02E60/10H01M2300/004
Inventor 伊天成胡春华徐子俊苗露梁成都
Owner CONTEMPORARY AMPEREX TECH CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com