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A kind of organic material and its preparation method, organic solid electrolyte and its preparation method and application

A technology of organic solids and organic materials, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problem of low energy density of batteries

Active Publication Date: 2021-04-09
BEIJING WELION NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even at 50°C, the conductivity of PEO is still only 1*10 -5 S / cm, in the actual battery system, the charge cut-off potential can only be up to 3.9V, and only some positive electrode materials with relatively low working potential can be used, while some high-voltage positive electrode materials such as lithium cobalt oxide, layered oxide, sharp It is difficult to match high-energy-density cathode materials such as spar oxide, resulting in a relatively low energy density of the battery

Method used

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  • A kind of organic material and its preparation method, organic solid electrolyte and its preparation method and application
  • A kind of organic material and its preparation method, organic solid electrolyte and its preparation method and application
  • A kind of organic material and its preparation method, organic solid electrolyte and its preparation method and application

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preparation example Construction

[0041] The present invention provides a kind of preparation method of organic material described in above-mentioned technical scheme, comprises the following steps:

[0042] Phosphorous substances, HO[CH 2 CH 2 O] x1 H. The substance with the structure of formula II is mixed with the metal-containing material, reacted, and the temperature is gradually raised until no fractions or by-products flow out, and purified to obtain an organic material;

[0043] The metal-containing material includes Li-containing material or Na-containing material; 1≤x1≤2000;

[0044] HO[CH 2 CH 2 O] x2 (C=O) y (CH 2 ) z CH 3 Formula II;

[0045] In formula II, 1≤x2≤100, y is 0 or 1, 0≤z≤10;

[0046] The phosphorus-containing substance, HO[CH 2 CH 2 O] x1 H. The molar ratio of the substance having the structure of formula II to the substance containing the metal is 1:a:b:c; wherein, 0≤a≤1.5, 0

[0047] In the present invention, the phosphorus-containing substance is prefe...

Embodiment 1

[0079] see figure 1 , figure 1 A schematic flow diagram for preparing an organic solid electrolyte for Example 1 of the present invention;

[0080] Under the protection of a nitrogen atmosphere, 9.8 g of phosphoric acid was added into 35 g of polyethylene glycol monomethyl ether (molecular weight: 350) which was continuously stirred, and reacted at 10° C. for 5 hours. Add 3.1 g of ethylene glycol and 4 g of sodium hydroxide, raise the temperature to 70° C., and react for 6 hours. After adding ethanol to fully dissolve, centrifuge at a speed of 5000 rpm for 15 min, and remove the white solid in the lower layer to obtain an organic solid with a purity of 85%. Add 3.51g NaClO 4 Continue stirring at 70°C for 1 hour; transfer to a vacuum oven, and dry at 120°C for 12 hours to obtain an organic solid electrolyte.

[0081] figure 2 The infrared spectrogram of the organic solid (before adding lithium salt) prepared for the embodiment of the present invention 1; From figure 2 I...

Embodiment 2

[0085] Under the protection of an argon atmosphere, 1.5 g of phosphorus pentoxide was dispersed in 20 g of cyclohexane, added to 90 g of polyethylene glycol monomethyl ether (molecular weight: 1000) under constant stirring, and reacted at -10°C for 3 hours. The temperature was raised to 80°C and reacted for 6 hours. An appropriate amount of water was added, and lithium hydroxide was added in batches at 50° C. to adjust the pH until pH=8. 10 g of water was added and distilled at 75° C. until no water flowed out to obtain an organic material with a purity of 93%. Add 2g of LiTFSI aqueous solution, continue to stir for 1 hour, distill at 75°C until no water flows out; transfer to a vacuum oven, and dry at 100°C for 15 hours to obtain an organic solid electrolyte.

[0086] Use a PE macroporous membrane with a diameter of 16mm as the substrate, use the prepared organic matter as the electrolyte, and use a 14mm metal Li as the counter electrode to assemble a CR2032 button battery o...

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Abstract

The invention provides an organic material and a preparation method thereof, an organic solid electrolyte and a preparation method and application thereof; the organic material has a structure of formula I, has a wide electrochemical window, and is stable to metal Li or metal Na. An organic solid electrolyte prepared by mixing organic materials and lithium salts or sodium salts has high electrical conductivity and a wide electrochemical window; the invention can regulate the hardness of organic solid electrolytes by adjusting the chain segment length and functional group types in organic materials , conductivity and electrochemical window size. The experimental results show that the conductivity of the organic solid electrolyte at 45°C is 10 ‑6 ~10 ‑2 S / cm; the electrochemical window is 4-6V.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries or sodium-ion batteries, and in particular relates to an organic material and a preparation method thereof, an organic solid electrolyte and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries and sodium-ion batteries have the advantages of high specific energy, long life, no memory effect, and low price, so they are widely used in consumer electronics, electric vehicles, and large-scale energy storage. However, with the society's strong demand for high energy density and high safety, liquid batteries are increasingly showing its disadvantages: 1. The energy density has almost reached the limit; 2. While increasing the energy density, safety issues are also becoming more and more serious. The more serious; 3. There is a problem of liquid leakage, which will cause the battery to pollute the environment or cause dangers such as fire and exp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058H01M10/054
CPCY02E60/10Y02P70/50
Inventor 杨琪黄杰王亚飞张美钰俞会根
Owner BEIJING WELION NEW ENERGY TECH CO LTD
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