Hypervolume stable lithium battery and preparation method thereof

A lithium battery and super-capacity technology, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as lack of lithium ion conductivity, heat shrinkable diaphragm, thermal safety issues, etc., to achieve a wider operating temperature range, Good electrical conductivity and the effect of improving the service life

Pending Publication Date: 2019-02-15
江苏微能电子科技有限公司
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Under overcharge/overdischarge or other extreme conditions of incorrect use, the internal temperature of lithium-ion batteries will rise rapidly, resulting in diaphragm damage, battery fire or explosion
Commonly used lithium battery separators are mainly polyolefin polymer materials such as polypropylene (PP) and polyethylene (PE). These materials have high tensile strength and electrolyte wettability, but due to the need for pore formation in the preparation process There is

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
  • Hypervolume stable lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1 Preparation of super-capacity stable lithium battery I

[0026] Step 1. Preparation of non-aqueous electrolyte: in an environment of 1ppm moisture at room temperature and pressure and inert gas, the LiSO 3 CF 3 11 parts, 55 parts room temperature ionic liquid electrolyte (of which [(CH 3 ) 3 NC 6 H 13 ]N(CF 3 SO 2 ) 2 50 parts of ionic liquid, 1 part of ethylene carbonate, 1.75 parts of ethyl methyl carbonate, 1.25 parts of 4-trifluoromethyl ethylene carbonate, 1 part of ethyl difluoroacetate), 6 parts of composite additives (including vinyl sulfite 1.92 parts of ester, (C 6 H 3 F)O 2 B(C 6 H 3 F 2 ) 1.8 parts, 0.9 parts of triisopropylphenyl phosphate, 1.2 parts of cyclohexylbenzene, 0.48 parts of nano lithium carbonate), add them to a conical flask with a grinding mouth, mix well, and stir until LiSO 3 CF 3 Dissolve completely to obtain a non-aqueous electrolyte. The nano-lithium carbonate is prepared by the following method: adding ethyl acetoacetate to a lithiu...

Example Embodiment

[0031] Example 2 Preparation of super-capacity stable lithium battery II

[0032] Step 1. Preparation of non-aqueous electrolyte: In an environment of 1ppm moisture at room temperature and pressure and inert gas, the LiAsF 6 19 parts, 75 parts room temperature ionic liquid electrolyte (of which [(CH 3 ) 3 NC 6 H 13 ]CF 3 SO 2 50 parts of ionic liquid, 7.5 parts of ethylene carbonate, 11.25 parts of ethyl methyl carbonate, 3.75 parts of 4-trifluoromethyl ethylene carbonate, 2.5 parts of ethyl difluoroacetate), 21 parts of composite additives (of which vinyl sulfite 6.3 parts of ester, (C 6 F 4 )O 2 B(C 6 F 5 ) 4.62 parts, triisopropylphenyl phosphate 3.36 parts, cyclohexylbenzene 4.2 parts, nano lithium carbonate 2.25 parts), add them to a conical flask with a grinding mouth, mix well, and stir until LiAsF 6 Completely dissolve to obtain non-aqueous electrolyte;

[0033] The nano-lithium carbonate is prepared by the following method: adding ethyl acetoacetate to a lithium hydroxide a...

Example Embodiment

[0045] Example 4 Comparative Example

[0046] The equipment and operation are the same as in Example 3, except that the LiPF 6 The organic solvent solution replaces the non-aqueous electrolyte to obtain the super-capacity stable lithium battery IV.

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 discloses a hypervolume stable lithium battery, the hypervolume stable lithium battery comprises a positive electrode, a negative electrode, a composite membrane and a nonaqueous electrolyte; the nonaqueous electrolyte comprises a lithium salt, a room temperature ionic liquid electrolyte and a composite additive, wherein the room temperature ionic liquid electrolyte comprises a quaternary ammonium salt cationic liquid and a cosolvent at the mass ratio of 1:(0.1-0.5); and the composite membrane comprises a multi-arc hole fiber based membrane and an inorganic nanometer coating on the surface of the multi-arc hole fiber based membrane. Compared with the prior art, in the provided hypervolume stable lithium battery and a preparation method of the hypervolume stable lithium battery, the nonaqueous electrolyte uses an ionic liquid to replace the traditional organic solvent, the range of the working temperature of the battery is expanded, the stability on the metal lithium is good, the safety of the battery at the high-power density is further improved, the potential safety hazard of the battery is eliminated; the composite membrane guarantees the better mechanical propertyand the electric conductivity of the composite membrane, and meanwhile, the thermal stability of the membrane is improved. Therefore, the hypervolume stable lithium battery is higher in ionic conductivity and excellent in thermal stability, chemical stability and electrochemical stability.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a super-capacity stable lithium battery and a preparation method thereof. Background technique [0002] Since the concept of rechargeable lithium battery was put forward in the early 1970s, since lithium ion battery was born and commercialized, due to its superior performance, it has rapidly become a multidisciplinary research hotspot in advanced energy, materials, and electrochemistry. , And is widely used in notebook computers, mobile phones, digital cameras, mp3 players and other small electronic equipment and medical equipment, as a driving power supply. [0003] Non-aqueous electrolyte is one of the key materials of lithium batteries, and its comprehensive properties (such as chemical and electrochemical stability, high and low temperature performance, etc.) directly affect the use of secondary lithium batteries. The non-aqueous electrolyte solution applied to rec...

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): H01M2/16H01M2/18H01M10/0525H01M10/0567H01M10/0569H01M10/0587H01M2/14B82Y30/00H01M50/40H01M50/44H01M50/489H01M50/497
CPCH01M10/0525H01M10/0567H01M10/0569H01M10/0587B82Y30/00H01M50/411H01M50/44H01M50/431H01M50/403H01M50/463H01M50/449Y02E60/10Y02P70/50
Inventor 孙志锐
Owner 江苏微能电子科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap