121st General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation for Young Scientist in Environmental and Energy Chemistry
Room No. Room 201B
Time THU 10:50-:
Code ENVR.O-6
Subject Synthesis of interconnected porous carbon nanosheets with controllable pore size and their use as electrode material for supercapacitor
Authors JIYOUNG LEE, Woo Kyung Cho1, Bongsoo Kim*, Hana Yoon2,*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
1Department of Chemistry, Chungnam National University, Korea
2Separation and Conversion Materials Research, Korea Institute of Energy Research, Korea
Abstract Interconnected porous carbon nanosheets (IPCNs) have recently received great attention as the electrode materials of electrochemical capacitors, as adsorbents, and as catalytic supports because of their high surface area, efficient ion transport, and three-dimensional (3D) structure. Herein, IPCNs with controllable pore-size distributions, ranging from micro- to mesoporous, are synthesized by pyrolysis of alkali metal citrates. Microporous, mesoporous, and hierarchical micro/mesoporous IPCNs are produced. Particularly, the hierarchical micro/mesoporous IPCNs derived from the mixture of potassium and sodium citrates in a weight ratio of 8:2 show high specific capacitance (∼200 F/g at 5 mV/s), excellent rate capability and cyclability. Furthermore, the mechanism of IPCN formation is studied. The alkali metal carbonate formed during heat treatment of alkali metal citrate is expected to act as both activation agents and templates for carbon nanosheets.
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