TY - JOUR
T1 - Facile Green Route to Ni/Co Oxide Nanoparticle Embedded 3D Graphitic Carbon Nanosheets for High Performance Hybrid Supercapacitor Devices
AU - Xiang, Cuili
AU - Liu, Yin
AU - Yin, Ying
AU - Huang, Pengru
AU - Zou, Yongjin
AU - Fehse, Marcus
AU - She, Zhe
AU - Xu, Fen
AU - Wu, Bing
AU - More Authors, null
PY - 2019
Y1 - 2019
N2 -
The demand for energy storage systems with superior performance has led to the creation of hybrid supercapacitor device. With proper designs, the hybrid supercapacitive materials can achieve high performance while reducing the overall cost. Herein, a novel method is developed for preparing three-dimensional hierarchical graphitic carbon nanocomposites with highly dispersed mixed Co-Ni oxide nanoparticles (Co-Ni-O/3DG) by a facile one-pot process involving carbonization and subsequent oxidation of metal ion doped biopolymer precursors. The mixed metal nanoparticles produced during carbonization enabled a top-down preparation of 3D graphitic carbon nanosheets. The nanocomposites were fully characterized and showed excellent electrochemical performance supported by the DFT calculation. Specific capacitance of 1586 F·g
-1
was achieved (current density 1.0 A·g
-1
), with capacitance retention of 94.5% after 10 000 cycles demonstrating exceptional cycling stability. In an asymmetric full-cell system using a Co-Ni-O/3DG positive electrode, high energy densities of 32.8-54.7 Wh kg
-1
associated with very high power densities of 11358-748.6 W kg
-1
were obtained, comparable to the most advanced contemporary supercapacitive materials, while they also possesses an improved cyclability as well as using biosourced staring materials, underlining the electrode's potential application in hybrid supercapacitor devices.
AB -
The demand for energy storage systems with superior performance has led to the creation of hybrid supercapacitor device. With proper designs, the hybrid supercapacitive materials can achieve high performance while reducing the overall cost. Herein, a novel method is developed for preparing three-dimensional hierarchical graphitic carbon nanocomposites with highly dispersed mixed Co-Ni oxide nanoparticles (Co-Ni-O/3DG) by a facile one-pot process involving carbonization and subsequent oxidation of metal ion doped biopolymer precursors. The mixed metal nanoparticles produced during carbonization enabled a top-down preparation of 3D graphitic carbon nanosheets. The nanocomposites were fully characterized and showed excellent electrochemical performance supported by the DFT calculation. Specific capacitance of 1586 F·g
-1
was achieved (current density 1.0 A·g
-1
), with capacitance retention of 94.5% after 10 000 cycles demonstrating exceptional cycling stability. In an asymmetric full-cell system using a Co-Ni-O/3DG positive electrode, high energy densities of 32.8-54.7 Wh kg
-1
associated with very high power densities of 11358-748.6 W kg
-1
were obtained, comparable to the most advanced contemporary supercapacitive materials, while they also possesses an improved cyclability as well as using biosourced staring materials, underlining the electrode's potential application in hybrid supercapacitor devices.
KW - cobalt oxide
KW - graphitic carbon nanosheets
KW - hybrid supercapacitor
KW - nickel oxide
KW - pseudocapacitance
UR - http://www.scopus.com/inward/record.url?scp=85065101220&partnerID=8YFLogxK
U2 - 10.1021/acsaem.9b00202
DO - 10.1021/acsaem.9b00202
M3 - Article
AN - SCOPUS:85065101220
SN - 2574-0962
VL - 2
SP - 3389
EP - 3399
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -