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Solid electrolyte material for lithium battery and preparation method and application of solid electrolyte material

A solid electrolyte, lithium battery technology, applied in solid electrolytes, electrolytes, lithium batteries, etc., can solve problems such as low ionic conductivity, and achieve the effects of simple equipment requirements, good thermal stability, and simple post-processing

Inactive Publication Date: 2017-03-22
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the serious safety problems in the organic electrolyte of lithium-ion batteries in the prior art and the low ion conductivity of the existing lithium-ion battery solid electrolyte, and provide a solid electrolyte material for lithium batteries and a preparation method thereof Compared with other inorganic solid electrolytes, it not only has a strong ability to accommodate lithium ions, but also has a higher ion conductivity, and at the same time has better thermal stability, which can greatly improve the battery life. safety

Method used

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  • Solid electrolyte material for lithium battery and preparation method and application of solid electrolyte material
  • Solid electrolyte material for lithium battery and preparation method and application of solid electrolyte material
  • Solid electrolyte material for lithium battery and preparation method and application of solid electrolyte material

Examples

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Effect test

Embodiment 1

[0030] A solid electrolyte material for a lithium battery, comprising:

[0031] Metal organic framework compound ZIF-8, 80wt%

[0032] Lithium salt LiPF 6 , 5wt%;

[0033] Film-forming additive polytetrafluoroethylene, 15wt%.

[0034] The preparation method of the solid electrolyte material for the lithium battery is as follows:

[0035] The first step is to prepare the metal organic framework compound ZIF-8. The raw material zinc salt and the ligand 2-methylimidazole were respectively dissolved in methanol, and the solutions of the two raw materials were mixed and allowed to stand at room temperature for 24 hours to react. Separate and dry to obtain the required ZIF-8 material. like figure 1 shown.

[0036] The second step is the preparation of ZIF-8 nanoporous membrane. At room temperature, mix the ZIF-8 material: polytetrafluoroethylene with an appropriate amount of isopropanol in a ratio of 1:1 to make a ZIF-8 nanoporous membrane, and dry it.

[0037] The third st...

Embodiment 2

[0040] A solid electrolyte material for a lithium battery, comprising:

[0041] Metal organic framework compound ZIF-67, 60wt%;

[0042] Lithium salt LiPF 6 , 5wt%;

[0043] Film-forming additive polytetrafluoroethylene, 20wt%;

[0044] Filler Li 3 PO 4 , 15wt%.

[0045] Its preparation method refers to Example 1. The filler is added in the second step to make a porous membrane.

Embodiment 3

[0047] A solid electrolyte material for a lithium battery, comprising:

[0048] Metal organic framework compound ZIF-8, 70wt%;

[0049] Lithium salt LiN(SO2 CF 3 ) 2 , 10wt%;

[0050] Film-forming additive polytetrafluoroethylene, 15wt%;

[0051] Filler Li 7 La 3 sn 2 o 12 , 5wt%.

[0052] Refer to Example 1 for the preparation method of ZIF-8 in the first step. The second step is the preparation of ZIF-8 nanoporous membrane. At room temperature, mix ZIF-8 material: lithium salt: polytetrafluoroethylene: filler according to the ratio of 7:1:1.5:0.5, add an appropriate amount of isopropanol and mix evenly, prepare a solid electrolyte membrane with a mold or a tablet, and dry .

[0053] In the third step, in the preparation of solid electrolyte membrane, soak in 1mol / L LiN(SO 2 CF 3 ) 2 Carbonate solution, dry.

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Abstract

The invention discloses a solid electrolyte material for a lithium battery and a preparation method and application of the solid electrolyte material, and belongs to the field of energy material preparation. The solid electrolyte material comprises a metal organic framework compound, a lithium salt, a film-forming additive and a filling. The solid electrolyte material for the lithium battery does not need polyoxyethylene or a derivative thereof; and compared with other inorganic solid electrolytes, the solid electrolyte material has the advantages of higher lithium ion containing capability, higher ionic conductivity and better heat stability, and the security of the battery can be greatly improved. The lithium-ion all-solid-state battery prepared by the method has the electrochemical properties equivalent to a liquid electrolyte. The solid electrolyte material for the lithium battery can be used for a lithium-ion battery, can be suitable for the systems of a lithium-sulfur battery, a lithium-air battery and the like, and is wide in application.

Description

technical field [0001] The invention belongs to the technical field of energy material preparation, and in particular relates to a solid electrolyte material for a lithium battery and a preparation method and application thereof. Background technique [0002] Along with economic development, portable electronic products such as mobile phone, notebook computer are popularized day by day. There is an urgent need for secondary batteries with small size, light weight, environmental friendliness, safety and reliability, high energy and high power. In addition, there have been many reports about battery explosions recently, and everyone has certain concerns about the safety of batteries. Therefore, solid-state batteries that replace traditional liquid organic electrolytes with solid-state electrolytes have attracted more and more attention. All-solid-state batteries can not only solve people's troubles about safety, but also can develop towards miniaturization, light weight, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/052H01M10/0525H01M12/08
CPCH01M10/052H01M10/0525H01M10/0562H01M12/08H01M2220/30H01M2300/0068H01M2300/008H01M2300/0071Y02E60/10
Inventor 董全峰范镜敏郑明森张金花
Owner XIAMEN UNIV
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