A kind of flexible polyaniline-based composite film and its preparation method, supercapacitor

A polyaniline-based, composite film technology, applied in the field of composite materials, can solve the problems of low area-specific capacitance, limited mass load, high cost of carbon fiber paper, and achieve the effect of simple preparation method, enhanced rate performance, and high area capacitance

Inactive Publication Date: 2018-02-16
深圳市前海金卓生物技术有限公司
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Problems solved by technology

And the cost of carbon fiber paper is high, and its active material (ie PANI) has limited mass loading (~4mg / cm 2 ) makes this composite unsuitable for high energy and high power applications
That is, although a SC with a small electrode mass loading can have a large mass-specific capacitance, it has a low area-specific capacitance
3. Using cellulose fiber / carbon nanotube (carbon nanotube, CNT) film as a template for in-situ synthesis of PANI, the mass loading of PANI on the cellulose fiber / CNT film of this type of material is also limited (~1.3 mg / cm 2 ), which in turn cannot meet the high energy and high power demands in wearable electronics

Method used

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  • A kind of flexible polyaniline-based composite film and its preparation method, supercapacitor
  • A kind of flexible polyaniline-based composite film and its preparation method, supercapacitor
  • A kind of flexible polyaniline-based composite film and its preparation method, supercapacitor

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Embodiment Construction

[0040] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0041] Materials used in the following examples Unless otherwise specified, the chemical substances used in the experiment were purchased from Sigma-Aldrich Co., USA, and the "ambient temperature" described herein is Refers to 18-26°C.

[0042] The preparation method of the flexible polyaniline-based composite membrane in the specific embodiment of the present invention and the performance test of the obtained flexible polyaniline-based composite membrane etc. include the following process:

[0043] 1. Preparation of exfoliated graphite (exfoliated graphite, ExG, exfoliated graphite can also be called graphene)

[0044] In a fume hood, two graphite rods (diameter 6.3 mm) were placed in a 0.1 M sodium sulfate aqueous solution as an anode and a cathode, respectively, with a distance of 1 cm. A voltage (12V) was applied for el...

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Abstract

The invention discloses a method for preparing a flexible polyaniline-based composite membrane, which comprises the following steps: (1) in-situ polymerizing aniline in the presence of exfoliated graphite, cellulose fibers and silver nitrate to obtain a mixture of nanocomposites, wherein, The mass ratio of silver nitrate to aniline is 0.05-0.5, and the mass ratio of exfoliated graphite to aniline is between 0.55-0.75; (2) the mixture is vacuum filtered and then dried to obtain a flexible polyaniline-based composite membrane. The composite film of the present invention has ultra-high area capacitance, excellent cycle characteristics, enhanced rate performance and simple preparation method, greatly surpassing the existing SC, and has potential applications in wearable electronic devices.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a flexible polyaniline-based composite film, a preparation method thereof, and a supercapacitor. Background technique [0002] Supercapacitors (SCs) are an important class of energy storage devices due to their faster charge-discharge rates, higher power density, longer cycle life and lower maintenance compared to rechargeable batteries. It has attracted widespread attention in the energy industry. [0003] When designing SCs, electrode materials play an important role in their performance. The main factors to be considered when designing electrode materials for SCs are capacitance, power and energy density, cycle life and stability, rate capability, and fabrication cost. Polyaniline (PANI) is a promising conductive polymer that has been widely used due to its faradaic pseudocapacitance, environmental stability, low cost, easy processability, and relatively good electrical co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/48H01G11/86
CPCY02E60/13
Inventor 邢孟秋商海涛魏泓
Owner 深圳市前海金卓生物技术有限公司
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