Flexible Pillared Graphene‐Paper Electrodes for High‐Performance Electrochemical Supercapacitors
書誌事項
- 公開日
- 2011-12-08
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/smll.201101719
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>Flexible graphene paper (GP) pillared by carbon black (CB) nanoparticles using a simple vacuum filtration method is developed as a high‐performance electrode material for supercapacitors. Through the introduction of CB nanoparticles as spacers, the self‐restacking of graphene sheets during the filtration process is mitigated to a great extent. The pillared GP‐based supercapacitors exhibit excellent electrochemical performances and cyclic stabilities compared with GP without the addition of CB nanoparticles. At a scan rate of 10 mV s<jats:sup>−1</jats:sup>, the specific capacitance of the pillared GP is 138 F g<jats:sup>−1</jats:sup> and 83.2 F g<jats:sup>−1</jats:sup> with negligible 3.85% and 4.35% capacitance degradation after 2000 cycles in aqueous and organic electrolytes, respectively. At an extremely fast scan rate of 500 mV s <jats:sup>−1</jats:sup>, the specific capacitance can reach 80 F g<jats:sup>−1</jats:sup> in aqueous electrolyte. No binder is needed for assembling the supercapacitor cells and the pillared GP itself may serve as a current collector due to its intrinsic high electrical conductivity. The pillared GP has great potential in the development of promising flexible and ultralight‐weight supercapacitors for electrochemical energy storage.</jats:p>
収録刊行物
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- Small
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Small 8 (3), 452-459, 2011-12-08
Wiley