1. High-Performance Three-Dimensional Mesoporous Graphene Electrode for Supercapacitors using Lyophilization and Plasma Reduction
- Author
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Jyongsik Jang, Chang-Min Yoon, Gyeongseop Lee, Minkyu Kim, and Choonghyeon Lee
- Subjects
Supercapacitor ,Materials science ,Graphene ,Oxide ,Nanotechnology ,02 engineering and technology ,Plasma ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Power level ,0104 chemical sciences ,law.invention ,Reduction (complexity) ,chemistry.chemical_compound ,chemistry ,Graphene electrode ,law ,General Materials Science ,0210 nano-technology ,Mesoporous material - Abstract
In this study, a three-dimensional (3D) mesoporous plasma-reduced graphene oxide web (mPrGO web) was fabricated via lyophilization of graphene oxide (GO) solution and subsequent plasma reduction. The lyophilized graphene oxide web (GO web) was successfully reduced by a short plasma treatment (2 s) using a commercially available plasma apparatus. The degree of reduction of the mPrGO web was determined by the applied plasma power (W) of the apparatus; the optimum power level for effective reduction was identified. The as-synthesized mPrGO web showed a high degree of reduction and robust graphitic characteristics, with a unique crack-like mesoporous structure created on corrugated graphene sheets. In addition to the above characteristics, the mPrGO web possessed a 3D web-like architecture that provided enhanced surface area along with ion-transportable channels derived from lyophilization. Owing to the synergistic effect of lyophilization and plasma reduction, the mPrGO web exhibited high electrical conductivity (87 S cm
- Published
- 2017