Molten-NaNH 2 Densified Graphene with In-Plane Nanopores and N-Doping for Compact Capacitive Energy Storage
Abstract
Capacitive carbons are attractive for energy storage on account of their superior rate and cycling performance over traditional battery materials, but they usually suffer from a far lower volumetric energy density. Starting with expanded graphene, a simple, multifunctional molten sodium amide treatment for the preparation of high-density graphene with high capacitive performance in both aqueous and lithium battery electrolytes is reported. The molten sodium amide can condense the expanded graphene, lead to nitrogen doping and, what is more important, create moderate in-plane nanopores on graphene to serve as ion access shortcuts in dense graphene stacks. Finally, the resulting high-density graphene electrode can deliver a volumetric capacitance of 522 F cm-3 in a potassium hydroxide electrolyte; and in a lithium-ion battery electrolyte, it exhibits a gravimetric and volumetric energy density of 618 W h kg-1 and 740 W h L-1, respectively, and even outperforms commercial LiFePO4.
- Authors:
-
[2];
[1]
- Wuhan Univ. (China). College of Chemistry and Molecular Sciences, Hubei Key Lab. of Electrochemical Power
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1494891
- Alternate Identifier(s):
- OSTI ID: 1400632
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 20; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; energy storage; graphene; molten salts; supercapacitors; volumetric energy density
Citation Formats
Lin, Shuang, Zhang, Chunyan, Wang, Zhiyong, Dai, Sheng, and Jin, Xianbo. Molten-NaNH 2 Densified Graphene with In-Plane Nanopores and N-Doping for Compact Capacitive Energy Storage. United States: N. p., 2017.
Web. doi:10.1002/aenm.201700766.
Lin, Shuang, Zhang, Chunyan, Wang, Zhiyong, Dai, Sheng, & Jin, Xianbo. Molten-NaNH 2 Densified Graphene with In-Plane Nanopores and N-Doping for Compact Capacitive Energy Storage. United States. https://doi.org/10.1002/aenm.201700766
Lin, Shuang, Zhang, Chunyan, Wang, Zhiyong, Dai, Sheng, and Jin, Xianbo. Fri .
"Molten-NaNH 2 Densified Graphene with In-Plane Nanopores and N-Doping for Compact Capacitive Energy Storage". United States. https://doi.org/10.1002/aenm.201700766. https://www.osti.gov/servlets/purl/1494891.
@article{osti_1494891,
title = {Molten-NaNH 2 Densified Graphene with In-Plane Nanopores and N-Doping for Compact Capacitive Energy Storage},
author = {Lin, Shuang and Zhang, Chunyan and Wang, Zhiyong and Dai, Sheng and Jin, Xianbo},
abstractNote = {Capacitive carbons are attractive for energy storage on account of their superior rate and cycling performance over traditional battery materials, but they usually suffer from a far lower volumetric energy density. Starting with expanded graphene, a simple, multifunctional molten sodium amide treatment for the preparation of high-density graphene with high capacitive performance in both aqueous and lithium battery electrolytes is reported. The molten sodium amide can condense the expanded graphene, lead to nitrogen doping and, what is more important, create moderate in-plane nanopores on graphene to serve as ion access shortcuts in dense graphene stacks. Finally, the resulting high-density graphene electrode can deliver a volumetric capacitance of 522 F cm-3 in a potassium hydroxide electrolyte; and in a lithium-ion battery electrolyte, it exhibits a gravimetric and volumetric energy density of 618 W h kg-1 and 740 W h L-1, respectively, and even outperforms commercial LiFePO4.},
doi = {10.1002/aenm.201700766},
journal = {Advanced Energy Materials},
number = 20,
volume = 7,
place = {United States},
year = {Fri Jul 14 00:00:00 EDT 2017},
month = {Fri Jul 14 00:00:00 EDT 2017}
}
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Figures / Tables:
Figure 1: Preparation and morphology and structure characterization of DNPG. a) Schematic illustration of the preparation process of DNPG from EG. b) SEM image of EG. c) SEM image of DNPG. d) TEM image of EG. e) TEM image of DNPG. f) An analysis of the nanopore lines shown inmore »
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