Non-combustible lithium metal battery electrolyte and preparation method thereof, lithium metal battery and preparation method thereof

A lithium metal battery, electrolyte technology, applied in the direction of cylindrical shell battery/battery, secondary battery manufacturing, electrolyte storage battery manufacturing, etc., can solve the problem that phosphate ester is not stable enough to lithium negative electrode, battery cycle stability is not good, lithium negative electrode Poor stability, etc.

Pending Publication Date: 2021-07-13
SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the electrolyte only uses phosphate as a solvent, the phosphate is not stable enough for the lithium negative electrode, so the stability of the electrolyte for the lithium negative electrode is not good, and the cycle stability of the battery is not good.

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
  • Non-combustible lithium metal battery electrolyte and preparation method thereof, lithium metal battery and preparation method thereof
  • Non-combustible lithium metal battery electrolyte and preparation method thereof, lithium metal battery and preparation method thereof
  • Non-combustible lithium metal battery electrolyte and preparation method thereof, lithium metal battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The present invention also provides a method for preparing an electrolyte for a non-flammable lithium metal battery described in the above technical solution, comprising the following steps: uniformly mixing a lithium salt and an organic solvent for the electrolyte to obtain an electrolyte for a non-flammable lithium metal battery.

[0035] In the present invention, the lithium salt and the organic solvent of the electrolyte are the same as those in the electrolyte of the non-combustible lithium metal battery described in the aforementioned technical solution, and will not be repeated here.

[0036] In the present invention, it is preferred to firstly mix diethyl ethyl phosphate and a hydrofluoroether solvent to obtain an organic solvent for an electrolyte; then mix a lithium salt with the organic solvent for an electrolyte to obtain an electrolyte for a non-flammable lithium metal battery. The present invention has no special requirements on the mixing method, as long a...

Embodiment 1

[0050] Preparation of electrolyte for non-flammable lithium metal batteries:

[0051] After mixing 2 mL of diethyl ethyl phosphate and 6.6 mL of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (the volume fraction of diethyl ethyl phosphate is 23 %, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether volume fraction is 77%), add 1.61g lithium bisfluorosulfonyl imide (concentration is 1.0mol / L), obtain nonflammable lithium metal battery electrolyte (abbreviated as LDT).

[0052] Preparation of lithium metal batteries:

[0053] The lithium iron phosphate positive electrode, separator and lithium metal negative electrode are sequentially arranged to obtain the battery matrix;

[0054] A non-flammable lithium metal battery electrolyte is injected between the positive electrode and the negative electrode of the battery matrix, and the button battery is obtained by packaging.

Embodiment 2

[0056] Preparation of electrolyte for non-flammable lithium metal batteries:

[0057] After mixing 2ml diethyl ethyl phosphate and 5.8ml 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether evenly (wherein the volume fraction of diethyl ethyl phosphate is 26%, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether volume fraction is 74%), add 1.60g bis(fluorosulfonyl)imide lithium (concentration is 1.1mol / L), obtain non-flammable lithium metal battery electrolyte.

[0058] Preparation of lithium metal batteries:

[0059] The lithium iron phosphate positive electrode, separator and lithium metal negative electrode are sequentially arranged to obtain the battery matrix;

[0060] A non-flammable lithium metal battery electrolyte is injected between the positive electrode and the negative electrode of the battery matrix, and the button battery is obtained by packaging.

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
current efficiencyaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of lithium metal batteries, and particularly relates to a non-combustible lithium metal battery electrolyte and a preparation method thereof, a lithium metal battery and a preparation method thereof. The diethyl ethyl phosphate and the hydrofluoroether solvent are adopted as the organic solvent of the lithium metal battery electrolyte, so that on one hand, the stability of a battery negative electrode material can be improved, the uniformity of lithium deposition on the surface of the negative electrode material is effectively regulated and controlled, the generation of lithium dendrites is inhibited, and the cycle life of a lithium metal battery is prolonged; and on the other hand, the electrolyte has the characteristic of incombustibility, and the safety performance of the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium metal batteries, and in particular relates to a non-flammable lithium metal battery electrolyte and a preparation method thereof, a lithium metal battery and a preparation method thereof. Background technique [0002] With the rapid development of portable electronic devices and new energy vehicles, people's requirements for battery energy density are getting higher and higher. At present, the liquid lithium-ion battery with graphite as the negative electrode is close to its energy density limit. In order to have a new breakthrough in energy density, researchers have refocused their attention on the lithium metal battery with metal lithium as the negative electrode. The lithium metal anode has an ultra-high theoretical specific capacity (3860mAh g -1 ) and extremely low electrode potential (-3.04 V, compared to a standard hydrogen electrode), thus being considered as an ideal anode material for n...

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): H01M10/0569H01M10/058H01M10/0525H01M10/04
CPCH01M10/0569H01M10/058H01M10/0525H01M10/0427H01M2200/00H01M2300/0091H01M2300/0037H01M2300/0034Y02P70/50Y02E60/10
Inventor 王秀丽陈勇杰涂江平
Owner SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
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