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Composite solid electrolyte and solid-stage battery

A solid electrolyte and polymer technology, applied in non-aqueous electrolyte batteries, secondary batteries, circuits, etc., can solve the problems of slow ion migration and low conductivity

Active Publication Date: 2018-04-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present disclosure is to provide a composite solid electrolyte, which can solve the technical problems of slow ion migration and low conductivity of existing composite solid electrolytes

Method used

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Examples

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preparation example Construction

[0051] The preparation method of the composite solid electrolyte can be a preparation method well known to those skilled in the art, for example, the composite solid electrolyte can be prepared according to the following steps:

[0052] (1) dissolving and mixing the polymer ionic liquid and the inorganic solid electrolyte in a solvent to obtain an electrolyte solution;

[0053] (2) Disperse the electrolyte solution evenly on the Teflon plate and volatilize the solvent to obtain a composite solid electrolyte.

[0054] Wherein, the solvent may be at least one selected from acetonitrile, dimethyl sulfoxide, tetrahydrofuran and N,N-dimethylformamide.

[0055] Wherein, in order to reduce the impact of environmental impurities and further improve the conductivity of the composite solid electrolyte, the environmental conditions in the preparation process are preferably: H 2 O content is less than 0.5ppm, O 2 The content is less than 0.5ppm.

[0056] The present disclosure also pro...

Embodiment 1

[0077] (1) Preparation of ionic liquid polymer:

[0078]

[0079] Take 2.0266g (10mmol) of p-vinylbenzenesulfonamide, 2.3794g (20mmol) of thionyl chloride, and 1.3982g (12mmol) of chlorosulfonic acid at 100°C for 12h to obtain compound 1a (2.5357g, yield 90%) ; 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.88(d,2×1H), 7.58(d,2×1H), 6.63(q,1H), 5.61(q,1H), 5.18(q,1H), 2.0(s,1H );

[0080] Take 2.8174g (10mmol) of compound 1a and 2.1451g (12mmol) of SbF 3 Reacted at 60°C for 12h to obtain compound 1b (2.3875g, yield 90%); 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.88(d,2×1H), 7.58(d,2×1H), 6.63(q,1H), 5.61(q,1H), 5.18(q,1H), 2.0(s,1H );

[0081] Take 2.6528g (10mmol) of compound 1b and 1.3821g (10mmol) K 2 CO 3 Reacted at 25°C for 2h to obtain compound 1c (3.0337g, yield 100%); 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.88(d,2×1H), 7.58(d,2×1H), 6.63(q,1H), 5.61(q,1H), 5.18(q,1H);

[0082] Take 3.0337g (10mmol) of compound 1c and 1.6128g (11mmol) of 1-ethyl-3-methylimidazole chloride to ...

Embodiment 2

[0091] (1) Preparation of ionic liquid polymer:

[0092]

[0093] Take 2.0266g (10mmol) of p-vinylbenzenesulfonamide, 2.3794g (20mmol) of thionyl chloride, and 1.3982g (12mmol) of chlorosulfonic acid at 100°C for 12h to obtain compound 2a (2.5357g, yield 90%) ; 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.88(d,2×1H), 7.58(d,2×1H), 6.63(q,1H), 5.61(q,1H), 5.18(q,1H), 2.0(s,1H );

[0094] Take 2.8174g (10mmol) of compound 2a and 2.1451g (12mmol) of SbF 3 Reacted at 60°C for 12h to obtain compound 2b (2.3875g, yield 90%); 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.88(d,2×1H), 7.58(d,2×1H), 6.63(q,1H), 5.61(q,1H), 5.18(q,1H), 2.0(s,1H );

[0095] Take 2.6528g (10mmol) of compound 2b and 1.3812g (10mmol) PhCO 3 H, 1.3821g (10mmol)K 2 CO 3 Reacted at 25°C for 12h to obtain compound 2c (2.8743g, yield 90%); 1 H NMR (400MHz, CDCl 3 , ppm), δ=7.86(d,2×1H), 7.47(d,2×1H), 3.82(t,1H), 2.83(d,2H);

[0096] Take 3.1937g (10mmol) of compound 2c and 1.6128g (11mmol) of 1-ethyl-3-methylimidazo...

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Abstract

The invention provides composite solid electrolyte and a solid-stage battery. The composite solid electrolyte contains an anionic ionic liquid polymer and inorganic solid electrolyte. A perfluorsulfimide ion with relatively weak coordination capacity is taken as an ionic center of the anionic ionic liquid polymer and has relatively small bonding capacity to Li<+>, so that the specific conductanceand Li<+> transference number of the composite solid electrolyte are increased; and the anionic ionic liquid polymer and the inorganic solid electrolyte can be composited in a relatively wide proportion range, so that the ionic conductivity and the mechanical property of the composite solid electrolyte can be further improved.

Description

technical field [0001] The present disclosure relates to a composite solid electrolyte, in particular, to a composite solid electrolyte and a solid battery. Background technique [0002] Secondary lithium-ion batteries have incomparable advantages such as high energy density, high operating voltage, and good cycle performance, and are widely used in portable energy devices. At present, the widely used liquid electrolyte is easy to corrode the positive and negative electrodes, resulting in irreversible loss of battery capacity. At the same time, the heat generated by the exothermic reaction will also decompose the liquid electrolyte, thereby generating flammable gases and causing serious safety problems such as fire and explosion. The use of solid electrolytes can avoid these disadvantages of liquid electrolytes, and its shape can be cut and changed arbitrarily, making battery design easier and lighter in texture. In addition, the good mechanical strength of solid electrolyt...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/05
CPCH01M10/05H01M10/056Y02E60/10
Inventor 宋威谢静马永军易观贵历彪郭姿珠
Owner BYD CO LTD
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