Frame-filling structural nanoporous carbon from amphiphilic carbonaceous mixture comprising graphite oxide

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• 作者：Pan-pan Chang^a ; ^b ; Kazuki Matsumura^c ; Cheng-yang Wang^a ; ^b ; Taro Kinumoto^c ; Tomoki Tsumura^c ; Ming-ming Chen^a ; ^b ; ^c ; ^{chmm@tju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Masahiro Toyoda^c ; ^{toyoda22@oita-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 刊名：Carbon
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：108
• 期：Complete
• 页码：225-233
• 全文大小：2745 K

文摘

Among all of the requirements for carbon materials used in electric double-layer capacitors (EDLCs), specific surface area (SSA) and electrical conductivity is a pair of mutual competing demands. In this paper, a series of frame-filling structural nanoporous carbons were prepared using an amphiphilic mixture of graphite oxide and a coal tar pitch-based carbonaceous material as precursor ensuring a high carbon yield. In the final porous composites, the few-layer graphene microsheets derived from graphite oxide contribute to the conductive frame construction by randomly cross-stacking during exfoliation and thermal reduction, while nanoparticles derived from coal tar pitch-based carbonaceous material fill into the frame and chemically bind on the surface of graphene microsheets of about 2 nm in thickness. The SSA is up to 2441 m² g⁻¹ and the electrical conductivity is 179 S/m. It has energy storage superiorities over an ordinary nanoporous carbon, rendering a shortened relaxation time constant (5.34 s), improved gravimetric capacitance (115.4 F/g) as well as cyclic stability in 10,000 cycles with 87.8% capacity retention in 1 M TEABF₄/PC electrolyte. The frame-filling structural nanoporous carbon shows great potential for blocks or high-capacity energy storage system by complex serial-parallel.