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Polymer single-ion electrolyte and preparation method thereof

A polymer and electrolyte technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of low room temperature conductivity, poor mechanical strength and film-forming performance, cumbersome synthesis steps, etc., and achieve high room temperature conductivity, mechanical Good strength and film-forming performance, high lithium ion transfer number effect

Active Publication Date: 2014-01-15
武汉市瑞华新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the polymer single-ion electrolytes in the prior art mostly have cumbersome synthesis steps (reticular single-ion conductors), low room temperature conductivity (generally only 10-4-10-5mS / cm), mechanical strength and poor film-forming performance (ion molten salt) and other issues

Method used

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  • Polymer single-ion electrolyte and preparation method thereof
  • Polymer single-ion electrolyte and preparation method thereof
  • Polymer single-ion electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0032] Embodiment 1-10 is the preparation of polymer single ion electrolyte

Embodiment 1

[0033] Example 1: Preparation of (p-vinylbenzenesulfonyl) (fluorosulfonyl) lithium imide (LiSFSI) and methoxytriethylene glycol acrylate (MPEGA, n=3) copolymer (electrolyte 1)

[0034] Add 1.32g (5.0mmol) (p-vinylbenzenesulfonyl)(fluorosulfonyl)imide lithium (LiSFSI) monomer, 1.09g (5.0mmol) methoxytriethylene glycol acrylic acid to a 25mL reaction flask Ester (MPEGA, n=3), 0.0042 g (0.025 mmol) azobisisobutyronitrile (AIBN) and 2.5 mL dry DMF. Pass argon to exhaust oxygen for 2h, and react at 50°C for 8h. After the reaction was completed, cool to room temperature, and slowly drop the reaction solution into excess diethyl ether under stirring to precipitate a viscous solid, pour out the upper layer of diethyl ether slowly, and repeat the dissolution and precipitation three times. A gel-like polymer solid was obtained; the viscous polymer was vacuum-dried at 80° C. for 8 hours to obtain 1.6 g of random copolymer (electrolyte 1). Through NMR characterization, the actual oxyeth...

Embodiment 2

[0036] Embodiment 2: (p-vinylbenzenesulfonyl) (trifluoromethylsulfonyl) lithium imide (LiSTFSI) and methoxy octaethylene glycol acrylate (MPEGA, n=8) copolymer (electrolyte 2) preparation

[0037] Add 1.32g (4.1mmol) (p-vinylbenzenesulfonyl)(trifluoromethylsulfonyl)imide lithium (LiSTFSI) monomer, 1.80g (3.7mmol) methoxy octaacetal to a 25mL reaction flask Diol (400) acrylate (MPEGA, n=8), 0.013 g (0.08 mmol) azobisisobutyronitrile (AIBN) and 5 mL dry DMF. Pass argon to exhaust oxygen for 2h, and react at 60°C for 15h. After the reaction was completed, cool to room temperature, and slowly drop the reaction solution into excess diethyl ether under stirring to precipitate a viscous solid, pour out the upper layer of diethyl ether slowly, and repeat the dissolution and precipitation three times. A gel-like polymer solid was obtained; the viscous polymer was vacuum-dried at 80° C. for 8 hours to obtain 42 g of a random copolymer (electrolyte 2).

[0038] Dissolve 42 g of the ra...

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Abstract

The invention discloses random copolymerization single-ion polymer electrolyte or block copolymerization single-ion polymer electrolyte which is obtained through copolymerization between a (p-vinyl phenylsulfonyl) (perfluoroalkyl sulfonyl) lithium imide monomer and a methoxyl polyethylene glycol acrylate monomer, and a preparation method of the electrolyte. The polymer single-ion electrolyte prepared by the method disclosed by the invention has the advantages of high room-temperature conductivity, high lithium ion transference number, low glass state temperature and degree of crystallinity, good mechanical strength and film-forming properties, wide electrochemical window, good thermal stability and the like, and has potential application values in the aspects of lithium (ion) batteries, carbon-based super-capacitors, solar batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of organic polymer functional materials and electrochemistry, and relates to a polymer single-ion electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density and output voltage, no memory effect, and environmental friendliness, and have been widely used in electronics, aerospace, electric vehicles and other fields. At present, the electrolyte of commercial secondary lithium-ion batteries is mainly composed of conductive salts (such as lithium hexafluorophosphate, LiPF 6 ), organic carbonate solvents (such as dimethyl carbonate (DMC), diethyl carbonate (DEC), ethylene carbonate (EC), etc.), and necessary functional additives (such as SEI film formers, anti-overshoot additives, barrier Combustion agent, LiPF 6 stabilizers, etc.) (Chemical Review, 2004, 104, 4303; Journal of Power Sources, 2006, 162, 1379). However, in this non-...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F212/14C08F290/06C08F293/00C08J5/18C08L33/14C08L25/18C08L51/00C08L53/00H01M10/0565
CPCY02E60/10
Inventor 周志彬史东洋聂进
Owner 武汉市瑞华新能源科技有限公司
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