Lee, Kangsuk Song, Haeni Lee, Kwang Hoon Choi, Soo Hyung Jang, Jong Hyun Char, Kookheon Son, Jeong Gon 2024-01-20T03:33:07Z 2024-01-20T03:33:07Z 2021-09-05 2016-08-31 1944-8244 https://pubs.kist.re.kr/handle/201004/123767 Electrochemical energy storage devices based on electric double layer capacitors (EDLCs) have received considerable attention due to their high power density and potential for obtaining improved energy density in comparison to the lithium ion battery. Ordered mesoporous carbon (OMC) is a promising candidate for use as an EDLC electrode because it has a high specific surface area (SSA), providing a wider charge storage space and size-controllable mesopore structure with a long-range order, suppling high accessibility to the electrolyte ions. However, OMCs fabricated using conventional methods have several drawbacks including low electronic conductivity and long ionic diffusion paths in mesopores. We used nickel nanofoam, which has a relatively small pore (sub-100 nm to sub mu m)network structure, as a current collector. This provides a significantly shortened electronic/ionic current paths and plentiful surface area, enabling stable and close attachment of OMCs without the use of binders. Thus, we present hierarchical binder-free electrode structures based on OMC/Ni nanofoams. These structures give rise to enhanced specific capacitance and a superior rate capability. We also investigated the mesopore structural effect of OMCs on electrolyte transport by comparing the capacitive performances of collapsed lamellar, cylindrical, and spherical mesopore electrodes. The highly ordered and straightly aligned cylindrical OMCs exhibited the highest specific capacitance and the best rate capability. English American Chemical Society DOUBLE-LAYER CAPACITORS HIGH-PERFORMANCE SUPERCAPACITORS ONE-POT SYNTHESIS GRAPHENE OXIDE 3D GRAPHENE PORE STRUCTURES BINDER-FREE DEIONIZATION EVAPORATION CATALYST Nickel Nanofoam/Different Phases of Ordered Mesoporous Carbon Composite Electrodes for Superior Capacitive Energy Storage Article 10.1021/acsami.6b06611 1 ACS Applied Materials & Interfaces, v.8, no.34, pp.22516 - 22525 ACS Applied Materials & Interfaces 8 34 22516 22525 scie scopus 000382514100082 2-s2.0-84986003629 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article DOUBLE-LAYER CAPACITORS HIGH-PERFORMANCE SUPERCAPACITORS ONE-POT SYNTHESIS GRAPHENE OXIDE 3D GRAPHENE PORE STRUCTURES BINDER-FREE DEIONIZATION EVAPORATION CATALYST ordered mesoporous carbon block copolymer self-assembly nickel nanofoam supercapacitor electric double-layer capacitance