Department of Chemistry, Inha University, 100 Inha-ro, Nam-gu, Incheon, 402-751 Korea.
ACS Nano. 2013 Jan 22;7(1):19-26. doi: 10.1021/nn3034309. Epub 2012 Dec 27.
Chemically modified graphene (CMG) nanoplatelets have shown great promise in various applications due to their electrical properties and high surface area. Chemical doping is one of the most effective methods to tune the electronic properties of graphene materials. In this work, novel B-doped nanoplatelets (borane-reduced graphene oxide, B-rG-O) were produced on a large scale via the reduction of graphene oxide by a borane-tetrahydrofuran adduct under reflux, and their use for supercapacitor electrodes was studied. This is the first report on the production of B-doped graphene nanoplatelets from a solution process and on the use of B-doped graphene materials in supercapacitors. The B-rG-O had a high specific surface area of 466 m(2)/g and showed excellent supercapacitor performance including a high specific capacitance of 200 F/g in aqueous electrolyte as well as superior surface area-normalized capacitance to typical carbon-based supercapacitor materials and good stability after 4500 cycles. Two- and three-electrode cell measurements showed that energy storage in the B-rG-O supercapacitors was contributed by ion adsorption on the surface of the nanoplatelets in addition to electrochemical redox reactions.
化学改性石墨烯（CMG）纳米片因其具有的电学性能和高表面积而在各种应用中表现出巨大的潜力。化学掺杂是调节石墨烯材料电子性能的最有效方法之一。在这项工作中，通过在回流条件下用硼烷-四氢呋喃加合物还原氧化石墨烯，大规模制备了新型 B 掺杂纳米片（硼烷还原氧化石墨烯，B-rG-O），并研究了其在超级电容器电极中的应用。这是首次从溶液法制备 B 掺杂石墨烯纳米片的报道，也是首次将 B 掺杂石墨烯材料应用于超级电容器的报道。B-rG-O 的比表面积高达 466 m²/g，表现出优异的超级电容器性能，包括在水性电解质中的 200 F/g 的高比电容以及优于典型碳基超级电容器材料的比表面积归一化电容和经过 4500 次循环后的良好稳定性。两电极和三电极电池测量表明，B-rG-O 超级电容器中的储能除了电化学氧化还原反应之外，还归因于纳米片表面的离子吸附。
