Method for preparing Kevlar nanofiber enhanced flexible solid linear supercapacitor

A supercapacitor, Kevlar fiber technology, applied in capacitor manufacturing, capacitors, hybrid capacitor electrolytes, etc., can solve the problems of limited mechanical strength and low mechanical properties of gels, and achieve high product quality, low cost, and improved strength. Effect

Active Publication Date: 2017-11-07
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention solves the low mechanical properties of the gel used in the preparation of all-solid-state linear supercapacitors in the prior art. The mechanical properties of the gel polymer are improved by generating cross-linked polymers, but the mechanical strength is still limited and often at the expense of materials. At the expense of toughness, a preparation method for Kevlar nanofiber-reinforced flexible solid-state linear supercapacitors is provided

Method used

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  • Method for preparing Kevlar nanofiber enhanced flexible solid linear supercapacitor
  • Method for preparing Kevlar nanofiber enhanced flexible solid linear supercapacitor
  • Method for preparing Kevlar nanofiber enhanced flexible solid linear supercapacitor

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specific Embodiment approach 1

[0036] Specific implementation mode one: combine figure 1 Specifically explaining this embodiment, a method for preparing a Kevlar nanofiber-reinforced flexible solid-state linear supercapacitor described in this embodiment is carried out according to the following steps:

[0037] 1. Preparation of Kevlar nanofibers:

[0038] Take the Kevlar pulp and dry it in a vacuum drying oven for 12h to 24h to obtain the dried Kevlar fiber. Put potassium tert-butoxide and the dried Kevlar fiber in the dimethyl sulfoxide / methanol mixture , magnetically stirred for 2 to 7 days to obtain a deep red Kevlar nano solution;

[0039] The mass ratio of the potassium tert-butoxide to the dried Kevlar fiber is (0.5~1):1;

[0040] The mass of potassium tert-butoxide and the volume ratio of dimethyl sulfoxide / methanol mixed solution are (5~15) g:200mL;

[0041] The volume ratio of dimethyl sulfoxide to methanol in the dimethyl sulfoxide / methanol mixture is (20~60):1;

[0042] Second, the assembly ...

specific Embodiment approach 2

[0056] Embodiment 2: This embodiment differs from Embodiment 1 in that the molecular weight of polyvinyl alcohol described in Step 3 is 80,000-160,000. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, Kevlar pulp is dried in a vacuum oven for 24 hours to obtain dried Kevlar fiber, and tert-butyl Potassium alkoxide and dried Kevlar fibers were placed in a mixed solution of dimethyl sulfoxide / methanol and magnetically stirred for 7 days to obtain a dark red Kevlar nano solution. Others are the same as in the first or second embodiment.

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Abstract

A method for preparing a Kevlar nanofiber enhanced flexible solid linear supercapacitor is disclosed. The invention relates to a method for preparing a supercapacitor, to solve the problem that in the prior art, the gel used in preparing all-solid-state linear supercapacitor is poor in mechanical property, and that mechanics strength is limited with the material toughness as a cost when a method of generating cross-linked polymer is used to improve the mechanical property of gel polymer. The method includes the steps of 1) preparing Kevlar nanofibers, 2) assembling a capacitor, 3) preparing electrolyte, 4) filling electrolyte, and 5) drying the capacitor. The invention is applicable to a method for preparing Kevlar nanofiber enhanced flexible solid linear supercapacitor.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor. Background technique [0002] Compared with traditional lithium-ion batteries, supercapacitors have unique advantages in terms of power density, charge-discharge rate, and cycle life. As more portable products come into people's field of vision, there is an increasing demand for supercapacitors in wearable and portable energy storage devices. Compared with parallel-plate capacitors, solid-state linear supercapacitors have lighter weight, smaller volume, better flexibility and are safer, and can be integrated into portable electronic devices in a convenient way. [0003] At this stage, the preparation of all-solid-state linear supercapacitors often uses ion-conducting gels to cooperate with the transport of ions to construct key electrolyte materials. This requires its high ionic conductivity, stable electrochemical stability window, non-decomposing work and good formability. Common g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56H01G13/00
CPCY02E60/13H01G11/56H01G13/00
Inventor 杨明曹文鑫杨磊齐小东侯莹朱嘉琦
Owner HARBIN INST OF TECH
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