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Title: Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation

Abstract

A novel activation method involving hydrothermal carbonization (HTC) and a pressure-induced low temperature oxidation has been demonstrated for cellulose derived HTC char by using hydrogen peroxide as an active di-oxygen source. The optimized porosity versus gravimetric capacitance results from cellulose derived HTC char synthesized at 220 °C. Almost homogeneous and small particle size micro-ellipse/sphere, relatively high surface area and narrow pore size distributions lead to a high bulk density, i.e. 0.73 g cm-3, of coating type electrodes, which is much denser than those manufactured from steam activated carbons for supercapacitor industry, i.e., 0.52 g cm-3. The resulting carbon prepared herein achieves a relatively high volumetric capacitance in an organic electrolyte-based supercapacitor reaching a competitive value of industrial system with the features of environment friendly, cost-effective as well as high yield, and less energy consumption.

Authors:
ORCiD logo [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  2. Queen Mary Univ. of London (United Kingdom); Imperial College, London (United Kingdom)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1607188
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
JPhys Energy
Additional Journal Information:
Journal Volume: 2; Journal Issue: 2; Journal ID: ISSN 2515-7655
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; hydrothermal carbonization; carbon; supercapacitors; coatings; volumetric capacitance

Citation Formats

Gao, Qiang, and Titirici, Maria-Magdalena. Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation. United States: N. p., 2020. Web. doi:10.1088/2515-7655/ab60e6.
Gao, Qiang, & Titirici, Maria-Magdalena. Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation. United States. doi:https://doi.org/10.1088/2515-7655/ab60e6
Gao, Qiang, and Titirici, Maria-Magdalena. Fri . "Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation". United States. doi:https://doi.org/10.1088/2515-7655/ab60e6. https://www.osti.gov/servlets/purl/1607188.
@article{osti_1607188,
title = {Achieving high volumetric EDLC carbons via hydrothermal carbonization and cyclic activation},
author = {Gao, Qiang and Titirici, Maria-Magdalena},
abstractNote = {A novel activation method involving hydrothermal carbonization (HTC) and a pressure-induced low temperature oxidation has been demonstrated for cellulose derived HTC char by using hydrogen peroxide as an active di-oxygen source. The optimized porosity versus gravimetric capacitance results from cellulose derived HTC char synthesized at 220 °C. Almost homogeneous and small particle size micro-ellipse/sphere, relatively high surface area and narrow pore size distributions lead to a high bulk density, i.e. 0.73 g cm-3, of coating type electrodes, which is much denser than those manufactured from steam activated carbons for supercapacitor industry, i.e., 0.52 g cm-3. The resulting carbon prepared herein achieves a relatively high volumetric capacitance in an organic electrolyte-based supercapacitor reaching a competitive value of industrial system with the features of environment friendly, cost-effective as well as high yield, and less energy consumption.},
doi = {10.1088/2515-7655/ab60e6},
journal = {JPhys Energy},
number = 2,
volume = 2,
place = {United States},
year = {2020},
month = {3}
}

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