A universal strategy for metal oxide anchored and binder-free carbon matrix electrode: A supercapacitor case with superior rate performance and high mass loading
Abstract Despite the significant advances in preparing carbon-metal oxide composite electrodes, strategies for seamless interconnecting of these two materials without using binders are still scarce. Herein we design a novel method for in situ synthesis of porous 2D-layered carbon–metal oxide composite electrode. Firstly, 2D-layered Ni-Co mixed metal-organic frameworks (MOFs) are deposited directly on nickel foam by anodic electrodeposition. Subsequent pyrolysis and activation procedure lead to the formation of carbon–metal oxides composite electrodes. Even with an ultrahigh mass loading of 13.4mgcm −2 , the as-prepared electrodes exhibit a superior rate performance of 93% (from 1 to 20mAcm −2 ), high capacitance (2098mFcm −2 at a current density of 1mAcm −2 ), low resistance and excellent cycling stability, making them promising candidates for practical supercapacitor application. As a proof of concept, several MOF derived electrodes with different metal sources have also been prepared successfully via the same route, demonstrating the versatility of the proposed method for the preparation of binder-free carbon–metal oxide composite electrodes for electrochemical devices. Highlights Facile synthesis of 2D-Co-Ni mixed MOFs by electrodeposition. In-situ growth of metal oxide anchored carbon matrix on Ni foam. The achieved 2D-CMO electrode exhibits excellent rate performance with high mass loading. This approach is expected to be a universal strategy for in-situ growth of metal oxide anchored carbon matrix electrodes. Graphical abstract A novel 2D carbon−metal oxide composite electrode was prepared by four steps and demonstrated as promising binder-free electrode materials for supercapacitors with ultrahigh rate performance of 93% (from 1 to 20mAcm −2 ) and high mass loading (13.4mgcm −2 ). Moreover, this new general strategy is also expected to facilitate the synthesis of carbon–metal oxide composite electrodes for other electrochemical devices. [DISPLAY OMISSION]
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기