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NTIS 바로가기한국수소 및 신에너지학회 논문집 = Transactions of the Korean Hydrogen and New Energy Society, v.29 no.6, 2018년, pp.627 - 634
Gallium-based liquid metal, e.g., eutectic gallium-indium (EGaIn), is highly attractive as an electrode material for flexible and stretchable devices. On the liquid metal, oxide layer is spontaneously formed, which has a wide band-gap, and therefore is electrically insulating. In this paper, we fabr...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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슈퍼커패시터의 특징과 사용되는 분야는? | 대표적인 에너지 저장장치로는 배터리와 슈퍼 커패시터가 있다. 슈퍼커패시터는 충방전이 빠르고 짧은 시간에 높은 에너지를 발산시키기 때문에 고출력의 동력이 필요한 분야에 사용된다. 슈퍼커패시터는 전기이중층 커패시터(electric double-layer capacitor, EDLC)와 전기화학 반응을 동반한 유사커패시터 (pseudocapacitor) 그리고 두 매커니즘을 접목시킨 하이브리드 커패시터 등으로 분류된다. | |
EGaIn 커패시터의 전기화학 특성 분석을 위하여 가장 먼저 한 것은? | 1(a)와 같은 장치를 구성하였다. 먼저, polydimethylsiloxane (PDMS) 로 사각 틀을 만들고, 바닥에 두 개의 구멍을 뚫어, 지름 500 μm의 타이곤 튜브를 연결한다. 두 개의 튜브에 각각 EGaIn (Sigma-Aldrich)을 주입하여 EGaIn 전극을 만들고 전해질을 채운다. | |
갈륨계 액체금속이 다양한 모양 구현이 가능한 이유는? | 갈륨계 액체금속의 또 다른 중요한 특징은 표면에 수 나노미터 두께의 갈륨 산화막을 자발적으로 형성하는 것이다16-19). 표면장력이 높아 성형이 어려운 수은과 달리, 갈륨계 액체금속은 표면에 형성된 자연산 화막(native oxide)이 표면장력을 낮추어 주기 때문에 구형 외에 다양한 모양 구현이 가능하다20-27). 이 산화막은 밴드갭이 커서(Eg: ~5 eV28)) 전기적으로는 부도체이다. |
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