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Graphene supercapacitor with both high power and energy density.
Nanotechnology. 2017 Nov 03; 28(44):445401.N

Abstract

Supercapacitors, based on fast ion transportation, are specialized to provide high power, long stability, and efficient energy storage using highly porous electrode materials. However, their low energy density excludes them from many potential applications that require both high energy density and high power density performances. Using a scalable nanoporous graphene synthesis method involving an annealing process in hydrogen, here we show supercapacitors with highly porous graphene electrodes capable of achieving not only a high power density of 41 kW kg-1 and a Coulombic efficiency of 97.5%, but also a high energy density of 148.75 Wh kg-1. A high specific gravimetric and volumetric capacitance (306.03 F g-1 and 64.27 F cm-3) are demonstrated. The devices can retain almost 100% capacitance after 7000 charging/discharging cycles at a current density of 8 A g-1. The superior performance of supercapacitors is attributed to their ideal pore size, pore uniformity, and good ion accessibility of the synthesized graphene.

Authors+Show Affiliations

Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210, United States of America.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28854156

Citation

Yang, Hao, et al. "Graphene Supercapacitor With Both High Power and Energy Density." Nanotechnology, vol. 28, no. 44, 2017, p. 445401.
Yang H, Kannappan S, Pandian AS, et al. Graphene supercapacitor with both high power and energy density. Nanotechnology. 2017;28(44):445401.
Yang, H., Kannappan, S., Pandian, A. S., Jang, J. H., Lee, Y. S., & Lu, W. (2017). Graphene supercapacitor with both high power and energy density. Nanotechnology, 28(44), 445401. https://doi.org/10.1088/1361-6528/aa8948
Yang H, et al. Graphene Supercapacitor With Both High Power and Energy Density. Nanotechnology. 2017 Nov 3;28(44):445401. PubMed PMID: 28854156.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Graphene supercapacitor with both high power and energy density. AU - Yang,Hao, AU - Kannappan,Santhakumar, AU - Pandian,Amaresh S, AU - Jang,Jae-Hyung, AU - Lee,Yun Sung, AU - Lu,Wu, Y1 - 2017/08/30/ PY - 2017/8/31/pubmed PY - 2017/8/31/medline PY - 2017/8/31/entrez SP - 445401 EP - 445401 JF - Nanotechnology JO - Nanotechnology VL - 28 IS - 44 N2 - Supercapacitors, based on fast ion transportation, are specialized to provide high power, long stability, and efficient energy storage using highly porous electrode materials. However, their low energy density excludes them from many potential applications that require both high energy density and high power density performances. Using a scalable nanoporous graphene synthesis method involving an annealing process in hydrogen, here we show supercapacitors with highly porous graphene electrodes capable of achieving not only a high power density of 41 kW kg-1 and a Coulombic efficiency of 97.5%, but also a high energy density of 148.75 Wh kg-1. A high specific gravimetric and volumetric capacitance (306.03 F g-1 and 64.27 F cm-3) are demonstrated. The devices can retain almost 100% capacitance after 7000 charging/discharging cycles at a current density of 8 A g-1. The superior performance of supercapacitors is attributed to their ideal pore size, pore uniformity, and good ion accessibility of the synthesized graphene. SN - 1361-6528 UR - https://www.unboundmedicine.com/medline/citation/28854156/Graphene_supercapacitor_with_both_high_power_and_energy_density_ L2 - https://doi.org/10.1088/1361-6528/aa8948 DB - PRIME DP - Unbound Medicine ER -
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