TY - JOUR
T1 - Biomass-derived carbonaceous positive electrodes for sustainable lithium-ion storage
AU - Liu, Tianyuan
AU - Kavian, Reza
AU - Chen, Zhongming
AU - Cruz, Samuel S.
AU - Noda, Suguru
AU - Lee, Seung Woo
N1 - Funding Information:
S. W. L acknowledges the financial support of the startup fund from the Georgia Institute of Technology. This work is supported in part by the Samsung Advanced Institute of Technology (SAIT)''s Global Research Outreach (GRO) Program. This work was performed in part at the Georgia Tech Institute for Electronics and Nanotechnology, a member of the National Nanotechnology Infrastructure Network, which is supported by the National Science Foundation.
Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2016/2/14
Y1 - 2016/2/14
N2 - Biomass derived carbon materials have been widely used as electrode materials; however, in most cases, only electrical double layer capacitance (EDLC) is utilized and therefore, only low energy density can be achieved. Herein, we report on redox-active carbon spheres that can be simply synthesized from earth-abundant glucose via a hydrothermal process. These carbon spheres exhibit a specific capacity of ∼210 mA h gCS-1, with high redox potentials in the voltage range of 2.2-3.7 V vs. Li, when used as positive electrode in lithium cells. Free-standing, flexible composite films consisting of the carbon spheres and few-walled carbon nanotubes deliver high specific capacities up to ∼155 mA h gelectrode-1 with no obvious capacity fading up to 10000 cycles, proposing to be promising positive electrodes for lithium-ion batteries or capacitors. Furthermore, considering that the carbon spheres were obtained in an aqueous glucose solution and no toxic or hazardous reagents were used, this process opens up a green and sustainable method for designing high performance, environmentally-friendly energy storage devices.
AB - Biomass derived carbon materials have been widely used as electrode materials; however, in most cases, only electrical double layer capacitance (EDLC) is utilized and therefore, only low energy density can be achieved. Herein, we report on redox-active carbon spheres that can be simply synthesized from earth-abundant glucose via a hydrothermal process. These carbon spheres exhibit a specific capacity of ∼210 mA h gCS-1, with high redox potentials in the voltage range of 2.2-3.7 V vs. Li, when used as positive electrode in lithium cells. Free-standing, flexible composite films consisting of the carbon spheres and few-walled carbon nanotubes deliver high specific capacities up to ∼155 mA h gelectrode-1 with no obvious capacity fading up to 10000 cycles, proposing to be promising positive electrodes for lithium-ion batteries or capacitors. Furthermore, considering that the carbon spheres were obtained in an aqueous glucose solution and no toxic or hazardous reagents were used, this process opens up a green and sustainable method for designing high performance, environmentally-friendly energy storage devices.
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U2 - 10.1039/c5nr07064c
DO - 10.1039/c5nr07064c
M3 - Article
AN - SCOPUS:84957633748
SN - 2040-3364
VL - 8
SP - 3671
EP - 3677
JO - Nanoscale
JF - Nanoscale
IS - 6
ER -
