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

Electrolyte for lithium titanate battery

A lithium titanate battery and electrolyte technology, which is applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of reducing battery power characteristics, and achieve the effects of enhancing battery specific power, reducing interface impedance, and optimizing composition

Inactive Publication Date: 2019-06-07
上海德朗能动力电池有限公司 +2
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] These additives can form a thicker protective film and improve the cycle and gas generation characteristics of lithium titanate batteries, but will reduce the power characteristics of the 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
  • Electrolyte for lithium titanate battery
  • Electrolyte for lithium titanate battery
  • Electrolyte for lithium titanate battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a glove box filled with argon, propylene carbonate, dimethyl carbonate and ethyl methyl carbonate were mixed at a mass ratio of 2:4:4, and then 1.2 mol / L lithium hexafluorophosphate (LiPF 6 ), followed by adding 1% by mass of vinylene carbonate (VC), 0.75% by mass of methylene disulfonate (MMDS) and 0.25% by mass of p-toluenesulfonyl Isocyanate (PTSI), after stirring evenly to obtain the required electrolyte, do not store it.

Embodiment 2

[0034] In a glove box filled with argon, propylene carbonate, dimethyl carbonate and ethyl methyl carbonate were mixed at a mass ratio of 2:4:4, and then 1.2 mol / L lithium hexafluorophosphate (LiPF 6 ), then adding mass percentage composition is 1% vinylene carbonate (VC), mass percentage composition is 2.25% methylene disulfonate (MMDS) and mass percentage composition is 0.75% p-toluenesulfonate Acyl isocyanate (PTSI), after stirring evenly, the required electrolyte solution is obtained, and it is not stored.

Embodiment 3

[0036] In a glove box filled with argon, propylene carbonate, dimethyl carbonate and ethyl methyl carbonate were mixed at a mass ratio of 2:4:4, and then 1.4mol / L lithium hexafluorophosphate (LiPF 6 ), then adding mass percentage composition is 1% vinylene carbonate (VC), mass percentage composition is 2.25% methylene disulfonate (MMDS) and mass percentage composition is 0.75% p-toluenesulfonate Acyl isocyanate (PTSI), after stirring evenly, the required electrolyte solution is obtained, and it is not stored.

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 relates to an electrolyte for a lithium titanate battery, which comprises an electrolyte lithium salt, a non-aqueous organic solvent and an additive, wherein the additive ccontains methylene methanedisulfonate (MMDS) and p-toluenesulfonyl isocyanate (PTSI) with a mass ratio of 1:1 to 4:1; and the additive mass accounts for 1.0% to 3.0% of the total mass of the electrolyte. The methylene methanedisulfonate and the p-toluenesulfonyl isocyanate contained in the additive have synergistic effects in a protective film forming process, the isocyanic acid group improves the film formingquality, the film forming thickness is reduced, transmission of lithium ions between negative electrode protective films is improved, and the interface impedance of the lithium ion battery is reduced.After the electrolyte is stored at 50 DEG C to 70 DEG C, the specific power performance is further improved. The electrolyte involved in the invention has high power characteristics while the cycle performance of the lithium titanate battery is improved.

Description

technical field [0001] The invention relates to an electrolyte solution for a lithium titanate battery, belonging to the technical field of lithium ion batteries. Background technique [0002] With the development of markets such as hybrid electric vehicles, cordless power tools and drones, high-power lithium-ion batteries are increasingly favored by the market. Lithium titanate materials have good development prospects in these fields due to their high rate and high safety characteristics. [0003] During the charge and discharge process, along with the lithium deintercalation of the negative electrode, the organic electrolyte is prone to side reactions on the surface of the lithium titanate material, resulting in increased battery gas production and decreased cycle performance. In order to inhibit the reaction between lithium titanate and organic electrolyte, electrolyte additives are usually used to form a protective film on the surface of lithium titanate to improve cyc...

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
CPCY02E60/10
Inventor 王海波赵文娟高学锋吴江峰陈瑶吕成学
Owner 上海德朗能动力电池有限公司
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