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

Lithium ion battery electrolyte and lithium ion secondary battery

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion battery electrolyte, lithium-ion secondary battery, and lithium-ion battery electrolyte, can solve the problems of insufficient cycle performance and low-temperature discharge performance, and achieve the effect of improving cycle performance

Inactive Publication Date: 2012-03-28
TIANJIN LISHEN BATTERY
View PDF2 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problems of insufficient cycle performance and low-temperature discharge performance in lithium-ion secondary batteries, and provides a functional lithium-ion battery electrolyte that can improve the cycle performance and low-temperature discharge performance of lithium-ion batteries and a battery made with the electrolyte. Lithium-ion secondary battery

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
  • Lithium ion battery electrolyte and lithium ion secondary battery
  • Lithium ion battery electrolyte and lithium ion secondary battery
  • Lithium ion battery electrolyte and lithium ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example 1 is used to illustrate that the resistance of the SEI film formed by the lithium-ion battery electrolyte additive provided by the present invention is relatively small.

[0032] Mix EC, EMC, and DEC evenly according to the volume ratio of 1:1:1, and slowly add lithium salt LiPF 6 A non-aqueous organic electrolyte with a concentration of 1M was prepared to prepare an electrolyte 1, and 2 wt% of tris(trimethylsilane) phosphate TMSP was added to the electrolyte 1 to prepare an electrolyte 2.

[0033] The negative electrode sheet with lithium sheet and artificial graphite as the active material is used as the two electrodes, the porous polyolefin compound diaphragm is used as the diaphragm, and the prepared electrolyte 1 and electrolyte 2 are used as the electrolyte to make a button half-cell.

[0034] Perform cyclic voltammetry (CV) test at a speed of 0.5mV / S, the test results are shown in figure 1 , it can be clearly seen that TMSP is reduced on the surface...

Embodiment 2

[0037] Mix EC, EMC, and DEC evenly according to the volume ratio of 3:4:3, and slowly add lithium salt LiPF 6 Prepare a non-aqueous organic electrolytic solution with a concentration of 1M, add tris(trimethylsilane) phosphate to the prepared electrolytic solution in proportions of 0.5wt%, 1wt%, and 5wt% of the total weight of the electrolytic solution to obtain Electrolyte 3, Electrolyte 4, Electrolyte 5.

Embodiment 3

[0039] Mix EC and DEC evenly according to the volume ratio of 3:7, and slowly add lithium salt LiPF 6Prepare a non-aqueous organic electrolyte with a concentration of 1M, add tris(triphenylsilane) phosphate and 2 wt% to the prepared electrolyte in proportions of 1wt%, 10wt%, and 15wt% of the total weight of the electrolyte Electrolyte 6, Electrolyte 7, and Electrolyte 8 were prepared from fluoroethylene carbonate FEC.

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 belongs to the technical field of battery, and discloses a lithium ion battery electrolyte and a lithium ion secondary battery. The lithium ion battery electrolyte contains electrolyte salts, a non-aqueous organic solvent, and an additive; the additive comprises a silane phosphate ester additive which accounts for 0.01%-20% of the total weight of the lithium ion battery electrolyte. the lithium ion secondary battery comprises the lithium ion battery electrolyte. By adding the silane phosphate ester additive into the lithium ion battery electrolyte, the invention obviously increases the cycle performance and low temperature discharge performance of the lithium ion battery.

Description

technical field [0001] The invention relates to a lithium-ion battery electrolyte and a lithium-ion secondary battery, in particular to a lithium-ion battery electrolyte capable of improving the cycle performance and low-temperature discharge performance of a lithium-ion battery and a lithium-ion secondary battery made of the electrolyte . Background technique [0002] In recent years, due to the pressure of environmental pollution and energy shortage, countries are forced to find new green, environmentally friendly and sustainable energy sources. Lithium-ion batteries that appeared in the 1990s are widely used as portable power sources due to their high voltage, high specific energy, long cycle life, stable discharge performance, and environmental protection. With the expansion of the application field of lithium-ion batteries, the requirements for battery performance are also increasing. In some special occasions, such as military, aerospace, aviation, etc., the performan...

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
IPC IPC(8): H01M10/0567H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 孔令丽苏志江高俊奎孙杰
Owner TIANJIN LISHEN BATTERY
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com