A kind of preparation method of solid electrolyte membrane

A technology of solid electrolyte membrane and solution, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, electrolyte, etc., can solve the problems of poor lithium ion conductivity and restrict application, and achieve the effect of improving contact interface, reducing cost, and increasing ion conductivity

Active Publication Date: 2020-07-28
南京宁智高新材料研究院有限公司
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Problems solved by technology

Among them, solid electrolytes are generally divided into Li 7 La 3 Zr 2 o 12 (LLZO) represents two types of solid ceramic electrolyte and PEO-based gel polymer electrolyte. Among them, the PEO gel polymer electrolyte has good interface contact with the positive and negative electrodes, but its poor lithium ion conductivity has always restricted its application in practice

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  • A kind of preparation method of solid electrolyte membrane
  • A kind of preparation method of solid electrolyte membrane
  • A kind of preparation method of solid electrolyte membrane

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and embodiment the present invention will be described in further detail:

[0034] A method for preparing a solid-state electrolyte membrane with lithium ion conductance enhancement, the detailed preparation process is as follows figure 1 shown.

[0035] (1) First, 0.9 g of polyvinyl alcohol (PVA) was weighed, dissolved in 10 ml of deionized water, and stirred at 60° C. for 2 hours to obtain solution A. Then measure 2ml of tetrabutyl titanate or tetrabutyl titanate solution, 2ml of deionized water, and 3 PO 4 20uL, mix it, sonicate for 5min, as solution B. Mix solution A with solution B, add 0.1g Li 2 SO 4 Stir well.

[0036] (2) Put the prepared precursor solution into the syringe, and the advancing speed of the solution is 0.1mL-0.5ml / h. Use aluminum foil as a base to lay flat on the base plate, use No. 21 or No. 23 spinning needles, the distance from the needle to the base is 15cm, the working voltage is 15kv, and...

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Abstract

The invention discloses a preparation method of a solid electrolyte membrane. The method adopts an electrospinning method and adds different concentrations of Li 2 SO 4 Preparation of SiO with mesoporous structure 2 Nanofiber, its main preparation method comprises the following steps: (1) prepare SiO 2 and Li 2 SO 4 (2) Preparation of nanofibers by electrospinning; (3) Cutting into discs according to the rules; (4) High temperature sintering; (5) Dropping PEO to prepare solid electrolyte. Experience of the invention 2 SO 4 doped mesoporous SiO 2 Compared with the solid electrolyte prepared by nanofibers without doping Li 2 SO 4 SiO 2 Nanofibers greatly enhance the conductivity of lithium ions and have good cycle stability.

Description

technical field [0001] The invention belongs to the field of solid-state electrolyte preparation, and in particular relates to a preparation method of a solid-state electrolyte with lithium ion conduction enhancing effect. Background technique [0002] With the development of electric vehicles, people have put forward higher requirements for energy storage technology. As the most important energy storage technology, lithium-ion batteries are developing in the direction of high energy, low cost and safer. The traditional negative electrode material is carbon material, and its good carbon layer structure can be used for intercalation and extraction of lithium ions, but its energy density is only 370mAh / g. It is found that metal lithium is used as the negative electrode material, and its energy density is as high as 3860mAh / g, but at the same time, lithium dendrites will be formed as the reaction proceeds. In traditional liquid electrolytes, the presence of lithium dendrites w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/056H01M10/0525H01M10/058B82Y30/00
CPCB82Y30/00H01M10/0525H01M10/056H01M10/058H01M2300/0065H01M2300/0094Y02E60/10Y02P70/50
Inventor 余建明王超鲁振达
Owner 南京宁智高新材料研究院有限公司
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