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High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors.
ACS Appl Mater Interfaces. 2017 Jul 05; 9(26):21763-21772.AA

Abstract

The volumetric performance is a vitally important metric for portable electronic and wearable devices with limited space. However, it is contradictory for the most supercapacitors in the connection between the volumetric and gravimetric capacitances. Herein, we report a simple strategy to prepare a free-standing and binder-free holey graphene/PPy film that possesses a dense microstructure but still high gravimetric capacitances. The holey graphene/PPy film own high-efficiency ion transport channels and big ion-accessible surface area to achieve high-powered supercapacitor electrodes, which have a superior volumetric capacitance (416 F cm-3) and high gravimetric capacitance (438 F g-1) at 1.0 A g-1 in 6 M KOH electrolyte. Meanwhile, it possesses high rate capability and good cycling performance (82.4% capacitance retention even after 2000 cycles). Furthermore, the volumetric energy density of assembled holey graphene/PPy film symmetric supercapacitor can show high as 22.3 Wh L-1. Such densely packed free-standing holey graphene/PPy film is a very significant electrode material for compact and miniaturized energy storage equipment in the further.

Authors+Show Affiliations

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin, Heilongjiang 150001, P.R. China.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin, Heilongjiang 150001, P.R. China. Hongdou Group, Jiangsu General Science Technology Co., Ltd. , Wuxi, Jiangsu 214000, P.R. China.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin, Heilongjiang 150001, P.R. China.Natural Science Research Center, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology , Harbin, Heilongjiang 150090, P.R. China.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin, Heilongjiang 150001, P.R. China.National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology , Harbin, Heilongjiang 150090, P.R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28605894

Citation

Fan, Zhimin, et al. "High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors." ACS Applied Materials & Interfaces, vol. 9, no. 26, 2017, pp. 21763-21772.
Fan Z, Zhu J, Sun X, et al. High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors. ACS Appl Mater Interfaces. 2017;9(26):21763-21772.
Fan, Z., Zhu, J., Sun, X., Cheng, Z., Liu, Y., & Wang, Y. (2017). High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors. ACS Applied Materials & Interfaces, 9(26), 21763-21772. https://doi.org/10.1021/acsami.7b03477
Fan Z, et al. High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors. ACS Appl Mater Interfaces. 2017 Jul 5;9(26):21763-21772. PubMed PMID: 28605894.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High Density of Free-Standing Holey Graphene/PPy Films for Superior Volumetric Capacitance of Supercapacitors. AU - Fan,Zhimin, AU - Zhu,Jianpeng, AU - Sun,Xinghui, AU - Cheng,Zhongjun, AU - Liu,Yuyan, AU - Wang,Youshan, Y1 - 2017/06/22/ PY - 2017/6/14/pubmed PY - 2017/6/14/medline PY - 2017/6/14/entrez KW - high density KW - high volumetric performance KW - holey graphene KW - polypyrrole KW - supercapacitor SP - 21763 EP - 21772 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 9 IS - 26 N2 - The volumetric performance is a vitally important metric for portable electronic and wearable devices with limited space. However, it is contradictory for the most supercapacitors in the connection between the volumetric and gravimetric capacitances. Herein, we report a simple strategy to prepare a free-standing and binder-free holey graphene/PPy film that possesses a dense microstructure but still high gravimetric capacitances. The holey graphene/PPy film own high-efficiency ion transport channels and big ion-accessible surface area to achieve high-powered supercapacitor electrodes, which have a superior volumetric capacitance (416 F cm-3) and high gravimetric capacitance (438 F g-1) at 1.0 A g-1 in 6 M KOH electrolyte. Meanwhile, it possesses high rate capability and good cycling performance (82.4% capacitance retention even after 2000 cycles). Furthermore, the volumetric energy density of assembled holey graphene/PPy film symmetric supercapacitor can show high as 22.3 Wh L-1. Such densely packed free-standing holey graphene/PPy film is a very significant electrode material for compact and miniaturized energy storage equipment in the further. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/28605894/High_Density_of_Free_Standing_Holey_Graphene/PPy_Films_for_Superior_Volumetric_Capacitance_of_Supercapacitors_ L2 - https://dx.doi.org/10.1021/acsami.7b03477 DB - PRIME DP - Unbound Medicine ER -
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