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Polymer lithium ion cell and its preparing method

A lithium-ion battery and polymer technology, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of difficult control of polymer reaction, high requirements for equipment and operation, and increased process complexity. Achieve the effects of easy practical production, good interface stability, and low requirements for operation and environment

Inactive Publication Date: 2003-06-25
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

The disadvantage of this method is that the separator is used, and the degree of polymer reaction in the battery is not easy to control
However, this process also has some problems in actual production. For example, the extraction process of the pore-forming agent increases the complexity of the process, and the thermal compounding process of the battery has higher requirements on equipment and operation.

Method used

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  • Polymer lithium ion cell and its preparing method
  • Polymer lithium ion cell and its preparing method

Examples

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Effect test

example 1：PMAML preparation approach 。0.15mol MMA、0.8mol AN and 0.05mol MALi150ml DMF( 2 ) or ， 1 ，0.3g 2 ，，。50℃8hPMAML。 Synthetic proportion PMAML。PMAMLMMA、AN and MALi0.4mol、0.4mol、0.2mol and 0.1mol、0.8mol、0.1mol，100ml and 150ml，0.4g and 0.27g，60℃ and 70℃，10 and 12。 example 2：，：8.5g，1.0g(Super-P)，0.5g( or SBR)。7g，，100μm。，：9.0g，(Super-P)0.3g，0.7g( or SBR)。14g，，80μm。 preparation 。 example 3：1g PMAML and 3g P(VDF-HFP)20g DMF 2 ( or NMP、、DMF 1 or )，，。 to 50μm，30min，LiPF6，EC/DMC。80％，1.4×10-3S·cm-1。 example 4： example 3 approach preparation ，PMAML and P(VDF-HFP)1g and 5g，20g DMF and 4g。， 1 (30-50℃)， 1 ，。 and ，(1M LiPF6-EC/DEC，2g/500mAh)。 example 4： example 3 approach ，(30-50℃)， 1 (50μm)。 and ，(1M LiPF6-EC/DMC，2g/500mAh)。 example 5： example 3 approach and ， 1 (50μm)。 and ，( approach and example 3)。 pic 150，0.3C。 pic 2，0.2mA·cm-2100％。 example 6

[0019] The polymer matrix material used in the present invention is poly(methyl methacrylate-acrylonitrile-lithium methacrylate), i.e. poly(MMA-AN-MALi) (abbreviated as PMAML) and polyvinylidene fluoride or polyvinylidene fluoride (Vinylidene fluoride-hexafluoropropylene) is PVDF or P(VDF-HFP). Lithium salt is LiPF 6 、LiBF 4 , LiClO 4 , LiAsF 6 、LiCF 3 SO 3 , LiN(CF 3 SO 2 ) 2 One of. The aprotic solvent is one or more of EC (ethylene carbonate), PC (propylene carbonate), DEC (diethyl carbonate), DMC (dimethyl carbonate), DME (ethyl methyl carbonate). Example 1: The preparation method of PMAML. Dissolve 0.15mol MMA, 0.8mol AN and 0.05mol MALi with 150ml DMF (dimethylformamide) or methanol to prepare a monomer mixture, put the prepared monomer mixture into a sealable glass container, add 0.3 g of azobisisobutyronitrile initiator, and remove the oxygen in the container with dry nitrogen, and seal the reaction container. Then react at 50°C for 8h to prepare PMAML. Se...

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Abstract

The polymer lithium ion cell includes anode plate, cathode plate and electrolyte. At least one of the anode plate and the cathode plate has polymer substrate material film comprising polymer A and polymer B, the polymer A is poly(methyl methacrylate-acrylonitrile-lithium methacrylate) and the polymer B is poly(vinylidene difluoride) or poly(vinylidene difluoride-hexafluoropropylene). During the preparation of the cell, the polymer substrate material is painted directly onto anode plate and / or the cathode plate to form cell diaphragm, and electrolyte liquid is filled to form polymer electrolyte. The polymer lithium ion cell has simple preparation process and no need of addition diaphragm.

Description

technical field [0001] The invention relates to a lithium ion battery and a preparation method thereof, more specifically to a polymer lithium ion battery and a preparation method thereof. Background technique [0002] Polymer lithium-ion batteries have the characteristics of high specific energy, no electrolyte leakage, good safety performance, flexible design, and easy mass production. With the continuous miniaturization of portable electronic devices, secondary batteries should also develop in the direction of light weight and ultra-thin. Lithium-ion batteries with polymer materials as electrolytes are favored by the market for their superior performance. Polymer lithium-ion batteries are a hot research topic for battery manufacturers and scientific research institutes. [0003] The core technology of polymer lithium-ion batteries lies in the preparation of polymer electrolytes. Polymer electrolytes are mainly divided into pure solid polymer ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 唐致远王占良
Owner TIANJIN UNIV
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