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Three-Dimensional Nitrogen and Boron Co-Doped Graphene for High-Performance All-Solid-State Supercapacitors
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Three-Dimensional Nitrogen and Boron Co-Doped Graphene for High-Performance All-Solid-State Supercapacitors
Posted:2016-03-18 16:32    Column:2012
Z.-S. Wu, A. Winter, L. Chen, Y. Sun, A. Turchanin, X. Feng*, K. Müllen*,
Advanced Materials 2012, 24 (37): 5130-5135. 
DOI: 10.1002/adma.201201948  [PDF]

Abstract
In this work, we demonstrate a simplified prototype device of high-performance ASSSs based on three-dimensional (3D) nitrogen and boron co-doped monolithic graphene aerogels (BN-GAs). The device possesses an electrode-separator-electrolyte integrated structure, in which the GAs serve as additive/ binder-free electrodes and a polyvinyl alcohol (PVA)/H2SO4 gel as solid-state electrolyte and thinner separator. The nitrogen and/or boron doping in carbon networks can facilitate charge transfer between neighboring carbon atoms and thus enhance the electrochemical performance of carbon-based materials.The as-prepared GAs show 3D interconnected frameworks with a macroporous architecture, whichare favorable for ion diffusion and electron transport in bulk electrode. Further, monolithic BN-GAs can be easily processed into thin electrode plates with a desirable size upon physical pressing. As a consequence, the resulting BN-GAs based ASSSs exhibit not only minimized device thickness, but also show high specific capacitance ( 62 F g−1 ), good rate capability, and enhanced energy density ( 8.65 W h kg −1 ) or power density ( 1600 W kg −1 ) with respect to undoped (U-GAs), nitrogen doped (N-GAs), boron doped (B-GAs) GAs, or layer-structured graphene paper

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn
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