Temperature-sensitive polymer electrolyte as well as preparation method and application thereof

A temperature-sensitive, electrolyte technology, used in hybrid capacitor electrolytes and other directions, can solve the problems that hinder the commercialization of high specific energy density and high power energy storage devices and other problems, and achieve easy promotion, easy diffusion of reaction heat, and low system viscosity. Effect

Active Publication Date: 2018-03-06
SUN YAT SEN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention obtains a temperature-sensitive polymer electrolyte through the reverse-phase suspension polymerization reaction, which is environmentally friendly and capable of reversible circulation; applying it to electrochemical energy storage devices can effectively solve the problems that have been hindering high specific energy density and high Safety Issues of Commercial and Wide Application of Power Energy Storage Devices

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  • Temperature-sensitive polymer electrolyte as well as preparation method and application thereof
  • Temperature-sensitive polymer electrolyte as well as preparation method and application thereof
  • Temperature-sensitive polymer electrolyte as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1 The preparation of thermosensitive type PAH-g-PNIPAAm copolymer

[0048] In 50mL methanol solution, add monomer 10g N-isopropylacrylamide and 150mg 4,4 ， -Azobis(4-cyanovaleric acid), reacted at 66°C for 3h under nitrogen protection, then poured into hot water for precipitation, filtered, washed and dried to obtain PNIPAAm-COOH product. Take an appropriate amount of dry-treated PNIPAAm-COOH to prepare a 5% aqueous solution, react with 1-ethyl-3-(dimethylaminopropyl) carbodiimide at a low temperature for 2 days, and then add 1.0g of polyallylamine (PAH) continued to react for 2 days, and finally prepared PAH-g-PNIPAAm copolymer.

[0049] In order to study the temperature-sensitive phase transition behavior of PAH-g-PNIPAAm copolymer in aqueous solution, dynamic light scattering was used to test the change of its hydration radius (Rh) with temperature (concentration was 0.1 mg / mL). Below the LCST such as 30°C, the hydration radius of the polymer is 7.2nm, w...

Embodiment 2

[0050] Example 2 Preparation of thermosensitive P (NIPAM-co-NVP) hydrogel

[0051] Accurately weigh 0.9g N-isopropylacrylamide, 0.1g vinylpyrrolidone, 0.02g ammonium persulfate, 0.05g N,N-methylene bisacrylamide, dissolve in 10mL DMSO solvent, pour into tube In the reactor, the polymerization reaction is carried out by free radical thermal polymerization. The initial product was soaked in distilled water for 3 days to remove unreacted products and linear oligomers, then cut into pieces, and dried in vacuum for 30 hours at a temperature of 60°C.

[0052] In order to study the temperature-sensitive properties of the copolymer, the saturated swelling ratio in distilled water at different temperatures was tested on the dry rubber obtained in the experiment. At 10°C, the swelling ratio of the copolymer hydrogel reaches 31.1 g / g, and as the temperature increases, the swelling ratio of the hydrogel shrinks to 5 g / g at 50°C, and has reversible shrinkage swelling features. It can be...

Embodiment 3

[0053] Example 3 Preparation of thermosensitive poly N-vinyl caprolactam

[0054] Weigh 10.0 g of N-vinylcaprolactam and 0.157 g of azobisisobutyronitrile, dissolve it in 70 mL of dioxane, and stir for 30 min at room temperature under nitrogen gas. The reaction was transferred to an oil bath, and the temperature was raised to 68° C., and the nitrogen reaction was continued for 8 h. Dioxane was removed by suspension evaporation, and n-hexane was added for precipitation treatment, suction filtered, and vacuum-dried to obtain poly-N-vinyl caprolactam.

[0055] In order to observe the temperature-sensitive characteristics of the polymer, poly-N-vinylcaprolactam was prepared into a 1.0 mg / mL aqueous solution, and placed in an oven, and the temperature in the cavity was gradually increased. It can be clearly observed that the polymer solution gradually changes from an initial transparent state to a cloudy emulsion, and the phase transition temperature is about 58°C. As the tempera...

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Abstract

The invention relates to a temperature-sensitive polymer electrolyte as well as a preparation method and application thereof. The preparation method of the temperature-sensitive polymer electrolyte comprises the following steps: stably dispersing an aqueous phase component containing an electrolyte in an oil phase component to form an emulsion under the condition of strong stirring, and then raising the temperature to carry out a reversed phase suspension polymerization reaction under the condition of continuous strong stirring and inert gas filling, so as to obtain the temperature-sensitive polymer electrolyte, wherein the volume ratio of the aqueous phase component to the oil phase component is (0.1-1.0):1. The temperature-sensitive polymer electrolyte is obtained through a reaction of areversed phase suspension polymerization method, and the electrolyte is green and environmentally-friendly and can be cycled reversibly; and the application of the electrolyte in an electrochemical energy storage device can effectively solve the safety problem hindering the wide application of high specific energy density and high-power energy storage devices in commercialization.

Description

technical field [0001] The invention relates to the energy field of electrochemical energy storage devices, in particular to a temperature-sensitive polymer electrolyte and its preparation method and application. Background technique [0002] Driven by the rapid development of Internet information technology, various portable electronic products such as smart phones, tablet computers, notebook computers and digital cameras are constantly being updated. With the continuous breakthrough and improvement of production technology and manufacturing process, these electronic products will surely It is developing in the direction of miniaturization, light weight and flexibility. At the same time, the energy output core of these multi-functional portable electronic products - electrochemical energy storage devices will also gradually achieve the goals of thin and flexible, high specific energy, high specific power, green and renewable, and long cycle life. Continue research and deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F226/10C08F222/38C08F220/20C08F126/06C08F2/32C08G81/02H01G11/56
CPCC08F2/32C08F126/06C08F220/54C08F226/10C08G81/021H01G11/56C08F222/385C08F220/20Y02E60/13
Inventor 阮文红张希黄逸夫章明秋户献雷雷秋芬
Owner SUN YAT SEN UNIV
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