Preparation method of radiation crosslinking polymer gel electrolyte skeleton material

Abstract

The invention relates to a preparation method of gel polymer electrolyte skeleton material by using radiation crosslinking and electrospinning technology and belongs to the field of polymer lithium ion battery. The skeleton material can be prepared into gel polymer electrolyte with good electrochemical properties and mechanical properties. The preparation steps are as below: (1) preparation of a blending-type polymer nano fiber membrane by using electrostatic spinning technology; (2) radiation crosslinking of polymer nano fiber membrane; and (3) cutting of crosslinking nano fiber membrane and lamination compression into the polymer gel electrolyte skeleton. The electrolyte skeleton material takes into account the equalization demand of mechanics-electrochemistry performances of gel polymer electrolyte, and has strong adsorption and retention on electrolyte; the prepared gel polymer electrolyte has high ionic conductivity, stable electrochemical window and good charge discharge performance, and the excellent mechanical properties can meet the assembly needs of the commonly used button battery; and the invention can be used in preparation of secondary lithium ion battery.

Description

[0001] technical field

[0002] The invention relates to a method for preparing a gel-type polymer electrolyte framework material by applying radiation crosslinking and electrospinning technologies, belonging to the field of polymer lithium ion batteries. Background technique

[0003] Lithium-ion batteries have the advantages of high energy density, high output voltage, long cycle life, low self-discharge rate, easy processing and strong designability, etc., and have broad application prospects in the fields of electric vehicles, portable electronic devices and mobile communications. The development and application of liquid lithium-ion batteries are limited due to the safety issue of "leakage" and the release of toxic and flammable gases. Although all-solid-state lithium-ion batteries have good safety performance, their room temperature ionic conductivity is low, which cannot meet practical application needs. Since the gel polymer electrolyte combines the advantages of bot...

Examples

Embodiment 1

[0020] Component 1: Polyacrylonitrile, molecular weight 10 5 g / mol (Mw), produced by PetroChina Jilin Petrochemical Company. Component 2: polyethylene oxide, molecular weight 10 5 g / mol (Mw), produced by Shanghai Liansheng Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 10wt%, and the concentration of polyethylene oxide is 10wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 50wt%, and the content of polyethylene oxide was 50wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Carry out electron beam radiation cross-linking to the dried blended nanofiber membrane, the radiation dose rate is 100Gy / s, the radiation dose is 10kGy, and the laminated thickness of the fiber membrane is 1mm during radiation treatment. The irradiated nanofibrous membrane was cut into discs ...

Embodiment 2

[0024] Component 1: Polyacrylonitrile, molecular weight 10 5 g / mol (Mw), produced by PetroChina Jilin Petrochemical Company. Component 2: Polypropylene oxide, molecular weight 10 5 g / mol (Mw), produced by Korea LG Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 14wt%, and the concentration of polyoxypropylene is 6wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 70wt%, and the content of polyoxypropylene was 30wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Carry out electron beam radiation crosslinking to the dried blended nanofiber membrane, the radiation dose rate is 100Gy / s, the radiation dose is 50kGy, and the laminated thickness of the fiber membrane is 2mm during radiation treatment. The irradiated nanofibrous membrane was cut into discs with a diameter...

Embodiment 3

[0028] Component 1: polyvinylidene fluoride, molecular weight 5.3×10 5 g / mol (Mw), produced by Shanghai Sanaifu New Material Co., Ltd. Component 2: polyethylene oxide, molecular weight 10 5g / mol (Mw), produced by Shanghai Liansheng Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 20wt%, and the concentration of polyethylene oxide is 5wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 80wt%, and the content of polyethylene oxide was 20wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Radiation crosslinking of gamma rays was performed on the dried blended nanofiber membrane, the radiation dose rate was 100Gy / s, the radiation dose was 100kGy, and the laminated thickness of the fiber membrane was 3mm during radiation treatment. The irradiated nanofibrous membrane was c...

[0001] technical field

[0002] The invention relates to a method for preparing a gel-type polymer electrolyte framework material by applying radiation crosslinking and electrospinning technologies, belonging to the field of polymer lithium ion batteries. Background technique

[0003] Lithium-ion batteries have the advantages of high energy density, high output voltage, long cycle life, low self-discharge rate, easy processing and strong designability, etc., and have broad application prospects in the fields of electric vehicles, portable electronic devices and mobile communications. The development and application of liquid lithium-ion batteries are limited due to the safety issue of "leakage" and the release of toxic and flammable gases. Although all-solid-state lithium-ion batteries have good safety performance, their room temperature ionic conductivity is low, which cannot meet practical application needs. Since the gel polymer electrolyte combines the advantages of bot...

Examples

Embodiment 1

[0020] Component 1: Polyacrylonitrile, molecular weight 10 5 g / mol (Mw), produced by PetroChina Jilin Petrochemical Company. Component 2: polyethylene oxide, molecular weight 10 5 g / mol (Mw), produced by Shanghai Liansheng Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 10wt%, and the concentration of polyethylene oxide is 10wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 50wt%, and the content of polyethylene oxide was 50wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Carry out electron beam radiation cross-linking to the dried blended nanofiber membrane, the radiation dose rate is 100Gy / s, the radiation dose is 10kGy, and the laminated thickness of the fiber membrane is 1mm during radiation treatment. The irradiated nanofibrous membrane was cut into discs ...

Embodiment 2

[0024] Component 1: Polyacrylonitrile, molecular weight 10 5 g / mol (Mw), produced by PetroChina Jilin Petrochemical Company. Component 2: Polypropylene oxide, molecular weight 10 5 g / mol (Mw), produced by Korea LG Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 14wt%, and the concentration of polyoxypropylene is 6wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 70wt%, and the content of polyoxypropylene was 30wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Carry out electron beam radiation crosslinking to the dried blended nanofiber membrane, the radiation dose rate is 100Gy / s, the radiation dose is 50kGy, and the laminated thickness of the fiber membrane is 2mm during radiation treatment. The irradiated nanofibrous membrane was cut into discs with a diameter...

Embodiment 3

[0028] Component 1: polyvinylidene fluoride, molecular weight 5.3×10 5 g / mol (Mw), produced by Shanghai Sanaifu New Material Co., Ltd. Component 2: polyethylene oxide, molecular weight 10 5g / mol (Mw), produced by Shanghai Liansheng Chemical Company. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 20wt%, and the concentration of polyethylene oxide is 5wt%. The blended polymer nanofiber membrane was prepared by electrospinning. The content of polyacrylonitrile in the nanofiber was 80wt%, and the content of polyethylene oxide was 20wt%. It was placed in an oven at 50°C for 12h to remove the residual solvent. Radiation crosslinking of gamma rays was performed on the dried blended nanofiber membrane, the radiation dose rate was 100Gy / s, the radiation dose was 100kGy, and the laminated thickness of the fiber membrane was 3mm during radiation treatment. The irradiated nanofibrous membrane was c...