Electrolyte for polyoxometalate ionic liquid lithium ion battery and preparation method thereof

A polyoxometalate and lithium polyoxometalate technology, which is applied in the field of polyoxometalate ionic liquid lithium-ion battery electrolyte and lithium battery electrolyte, can solve narrow temperature range, safety problems, and low ignition point and other problems, to achieve the effect of wide applicable temperature range, reduced polarization, and high ignition point

Active Publication Date: 2017-05-31

中国东方电气集团有限公司

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AI-Extracted Technical Summary

Problems solved by technology

This invention provides a novel lithium-ion battery electrolyte that can be stored at high temperature and has a certain flame retardancy. The ionic liquid also has high conductivity, but the electrolyte salt in the electrolyte described in the invention is LiPF6, the salt will produce HF when encountering a trace amount of water. As we all know, HF is the key factor leading to the failure of lithium batteries; in addit...

Abstract

The invention discloses electrolyte for a polyoxometallate ionic liquid lithium ion battery. The electrolyte comprises the following raw materials: ionic liquid and lithium polyoxometallate, wherein the ionic liquid is synthesized from imidazolium cations and polyoxometallate anions; the structural formula of the imidazolium cations is shown in the specification, wherein each of R1 and R2 is one of alkyl groups with 1-6 carbon atoms; the polyoxometallate anions refer to [XY12O40]<3-> or [XY12O40]<4->, wherein X is any one of two elements P and Si, and Y is any one of two elements Mo and W. Since the lithium polyoxometallate Li3XY12O40 is in a three-dimensional skeleton structure, lithium ions can be conducted in a three-dimensional skeleton, and the polarity caused by the ion transport problem of the battery is reduced; since the lithium polyoxometallate does not contain fluorine, the moisture problem and the safety problem caused by fluorine are avoided.

Application Domain

Electrolyte accumulators manufacture

Technology Topic

Polyoxometalate ILithium electrode +9

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Examples

Experimental program(14)
Comparison scheme(2)

Example Embodiment

[0021] Example 1

[0022] An electrolyte solution for a polyoxometalate ionic liquid lithium ion battery, comprising the following raw material components mixed: ionic liquid and polyoxometalate lithium salt;

[0023] Described ionic liquid comprises imidazolium cation and polyoxometalate anion synthesis, and wherein the structural formula of imidazolium cation is: , abbreviated as [MeMeIm] + (Where R1, R2 are both methyl-CH 3 , methyl is abbreviated as -Me, imidazole main structure is abbreviated as Im); phosphomolybdate anion refers to [PMo 12 o 40 ] 3- , the synthesized ionic liquid is [MeMeIm] 3 [PMo 12 o 40 ]. The electrolyte salt is Lithium polyoxometalate 3 PMo 12 o 40.

Example Embodiment

[0024] Example 2

[0025] An electrolyte solution for a polyoxometalate ionic liquid lithium ion battery, comprising the following raw material components mixed: ionic liquid and polyoxometalate lithium salt;

[0026] Described ionic liquid comprises imidazolium cation and polyoxometalate anion synthesis, and wherein the structural formula of imidazolium cation is: , abbreviated as [MeEtIm] + (where R1 is methyl-CH 3 , R2 is ethyl-C 2 h 5 , methyl is abbreviated as -Me, ethyl is abbreviated as -Et, and the main structure of imidazole is abbreviated as Im); phosphotungstate anion refers to [PW 12 o 40 ] 3- , the synthesized ionic liquid is [MeEtIm] 3 [PW 12 o 40 ]. The electrolyte salt is Lithium polyoxometalate 3 PW 12 o 40.

Example Embodiment

[0027] Example 3

[0028] An electrolyte solution for a polyoxometalate ionic liquid lithium ion battery, comprising the following raw material components mixed: ionic liquid and polyoxometalate lithium salt;

[0029] Described ionic liquid comprises imidazolium cation and polyoxometalate anion synthesis, and wherein the structural formula of imidazolium cation is:

[0030] , abbreviated as [MeBuIm] + (where R1 is methyl-CH 3 , R2 is n-butyl-C 4 h 9 , methyl is abbreviated as -Me, n-butyl is abbreviated as -Bu, and the main structure of imidazole is abbreviated as Im); silicotungstate anion refers to [SiW 12 o 40 ] 4- , the synthesized ionic liquid is [MeBuIm] 4 [SiW 12 o 40 ]. The electrolyte salt is Lithium polyoxometalate 4 SiW 12 o 40.

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Classification and recommendation of technical efficacy words

Increase transfer rate
reduce polarization

Electrolyte for polyoxometalate ionic liquid lithium ion battery and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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