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Title: 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 LiFePO 4.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Wuhan Univ. (China). College of Chemistry and Molecular Sciences, Hubei Key Lab. of Electrochemical Power
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC)
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. doi: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. doi: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 = {2017},
month = {7}
}

Journal Article:
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Cited by: 6 works
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Figures / Tables:

Figure 1 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 » (e). Schematic illustration of ion transport in graphene stacks g) with and h) without in-plane nanopores for shortcuts.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.