[논문]전기화학 증착법에 의해 합성된 폴리옥소메탈레이트/폴리피롤/탄소천 전극의 전기화학적 특성

윤조희; 최봉길

doi:10.14478/ace.2016.1062

전기화학 증착법에 의해 합성된 폴리옥소메탈레이트/폴리피롤/탄소천 전극의 전기화학적 특성
Electrochemical Characteristics of Polyoxometalate/Polypyrrole/Carbon Cloth Electrode Synthesized by Electrochemical Deposition Method 원문보기

공업화학 = Applied chemistry for engineering, v.27 no.4, 2016년, pp.421 - 426

초록
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본 연구에서는 폴리옥소메탈레이트(polyoxometalate, POM)가 도핑된 폴리피롤(polypyrrole, Ppy)을 3차원 구조의 탄소천(carbon cloth, CC) 표면 위에 전기화학적 증착법을 이용하여 합성하고 이의 의사커패시터 특성을 순환전압전류법과 정전류 충전-방전법을 사용하여 분석하였다. POM-Ppy의 코팅은 전기화학적 증착 시간에 따라서 얇은 conformal형태의 코팅으로 조절되었다. 제조된 POM-Ppy/CC의 재료 특성은 전자주사현미경과 X-선 분광분석을 사용하여 분석하였다. POM-Ppy/CC의 3차원 나노복합체 구조는 높은 비정전용량($561mF/cm^2$), 고속 충방전(85% 용량 유지율) 및 장수명 특성(97% 용량 유지율)을 나타내었다.

Abstract ▼ AI-Helper

In this report, polyoxometalte (POM)-doped polypyrrole (Ppy) was deposited on surface of three-dimensional carbon cloth (CC) using an electrodeposition method and its pseudocapacitive behavior was investigated using cyclic voltammetry and galvanostatic charge-discharge. The POM-Ppy coating was thin and conformal which can be controlled by electrodeposition time. As-prepared POM-Ppy/CC was characterized using scanning electron microscope and energy-dispersive X-ray spectroscopy. The unique 3D nanocomposite structure of POM-Ppy/CC was capable of delivering excellent charge storage performances: a high areal capacitance ($561mF/cm^2$), a high rate capability (85%), and a good cycling performance (97% retention).

주제어

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제안 방법

The electrolyte used is a 1 M H₂SO₄ aqueous solution. In order to evaluate supercapacitor performance, CV tests were carried out at various scan rates from 10 to 100 mV/s. Galvanostatic charge/discharge measurements were made at current densities from 1 to 30 mA/cm^-2.

대상 데이터

, Ltd. The deionized (DI) water (18.2 MΩ cm, Millipore Milli Q water system) was used in all experiments.
The Pt wire and an Ag/AgCl electrode were used as the counter and reference electrode, respectively. The electrolyte used is a 1 M H₂SO₄ aqueous solution. In order to evaluate supercapacitor performance, CV tests were carried out at various scan rates from 10 to 100 mV/s.

이론/모형

All of electrochemical measurements, including cyclic voltammetry (CV) and galvanostatic charge/discharge, were conducted on a VersaSTAT 4 (Princeton Applied Research) using a conventional three-electrode system. The Pt wire and an Ag/AgCl electrode were used as the counter and reference electrode, respectively.

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