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A composite electrode material for an intelligent supercapacitor and its preparation method and application

A supercapacitor and composite electrode technology, applied in the field of materials, can solve the problems that the composite cannot be processed in solution, the synthesis method is complicated, and the composite effect is not good, so as to achieve the effect of high energy density, simple composite method, and high cycle stability

Active Publication Date: 2020-01-03
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved: In order to overcome the shortcomings of the traditional carbon nanotube covalent modification process, such as complex synthesis methods, high cost, poor composite effect, and inability to process the composite in solution, the invention provides a composite electrode material for smart supercapacitors and Its preparation method and application

Method used

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  • A composite electrode material for an intelligent supercapacitor and its preparation method and application
  • A composite electrode material for an intelligent supercapacitor and its preparation method and application
  • A composite electrode material for an intelligent supercapacitor and its preparation method and application

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Embodiment 1

[0041] Preparation of alkyl carbazole monomer: 2,7-dibromocarbazole (1 g, 3 mmol) was dissolved in 7.5 mL of DMF, NaH (0.5 g) was added and stirred at room temperature for 30 min. Then 1,8-dibromooctane (4.11 g, 15 mmol) was added dropwise to the above solution, and 2.5 mL of DMF was added to wash the flask wall, and the reaction was carried out at room temperature for 24 h. After the reaction, the mixture was extracted with 100 mL of deionized water to remove NaH, and then the filtrate was rotary evaporated until it reached 5 mL, and then 100 mg of silica gel powder was added and then rotary evaporated to powder again. The crude product was separated and purified through a silica gel column (the eluent is a molar ratio of petroleum ether: dichloromethane = 12:1, first add 100mL petroleum ether to wash away excess 1,8-dibromooctane) to obtain a colorless oily liquid compound , spin-dried by a rotary evaporator, sealed with plastic wrap (perforated) and vacuum-dried to obtain 2...

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Abstract

The invention discloses a composite electrode material used for intelligent supercapacitors, a preparation method and application thereof. The material is prepared through Williamson aethrization reaction, and an alkyl carbazole polymer containing bromine atom groups in side chains is bonded onto a hydroxylated carbon nanotube after acidification in a covalent bond mode. Through electrochemical and spectroelectrochemical testing, the intelligent devices prepared from the electrode material can obtain the energy density of 174.7 W.h.kg<-1>, and after 5000 cycles, the retention rate of specificcapacitance reaches up to 96%. Moreover, the device has rapid and reversible color change from black brown to light gray displayed inside a researched potential window.

Description

technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a composite electrode material for an electrochromic supercapacitor, a preparation method thereof, and an electrochromic supercapacitor prepared from the electrode material. Background technique [0002] Due to the comprehensive excellent performance of high specific capacity, high power density, ultra-long cycle life, high stability and environmental friendliness, supercapacitors have shown great application prospects in many fields such as portable and wearable electronic products, but how to further improve their Application efficiency is an important issue to be solved urgently. For example, people urgently need to develop supercapacitors that can intuitively and real-time reflect their working status, so electrochromic smart supercapacitors have aroused great interest. [0003] Polypyrrole (PPy), polyaniline (PANI) and polythiophene (PT) and their derivatives a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/48H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 孙莹叶童童林保平杨洪张雪勤
Owner SOUTHEAST UNIV
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