TY - JOUR
T1 - Hollow mesoporous carbon spheres enwrapped by small-sized and ultrathin nickel hydroxide nanosheets for high-performance hybrid supercapacitors
AU - Fu, Yongsheng
AU - Zhou, Yan
AU - Peng, Qiong
AU - Yu, Chunyan
AU - Wu, Zhen
AU - Sun, Jingwen
AU - Zhu, Junwu
AU - Wang, Xin
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (Grant Nos. 51472120 , 51772156 and 51872144 ), Natural Science Foundation of Jiangsu Province (Grant Nos. BK20180019 and BK20171423 ), the Fundamental Research Funds for the Central Universities (No. 30917015102 , No. 30918014103 ), the Opening Project of the Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials (No. 51472101 ) and PAPD of Jiangsu .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/10/31
Y1 - 2018/10/31
N2 - Ni(OH)2-based composites are promising electrode materials for high-performance hybrid supercapacitors due to their high theoretical specific capacity and unique nanostructures. Unfortunately, most regular Ni(OH)2-based electrodes can deliver much lower specific capacity in comparison with the theoretical value and exhibit poor rate capability and cycling stability due to the low electrical conductivity and large volume variation. Herein, we present a facile chemical precipitation method to fabricate a hierarchical core-shell nanocomposite of hollow mesoporous carbon spheres enwrapped Ni(OH)2 nanosheets. The Ni(OH)2 nanosheets possess unique small-sized and ultrathin morphology, which endues the resulting nanocomposite with a large specific surface area (481.64 m2 g−1) and good conductivity, thus giving a high specific capacity of 844 C g−1 at a current density of 1 A g−1 with excellent cycling stability and superior rate capability. Furthermore, a hybrid supercapacitor is constructed which presents a high energy density of 45.84 Wh kg−1 at a power density of 799 W kg−1 and delivers an excellent cycling stability of capacitance retention rate of 91.4% after 10,000 cycles at 10 A g−1, demonstrating potential application for high-performance hybrid supercapacitor.
AB - Ni(OH)2-based composites are promising electrode materials for high-performance hybrid supercapacitors due to their high theoretical specific capacity and unique nanostructures. Unfortunately, most regular Ni(OH)2-based electrodes can deliver much lower specific capacity in comparison with the theoretical value and exhibit poor rate capability and cycling stability due to the low electrical conductivity and large volume variation. Herein, we present a facile chemical precipitation method to fabricate a hierarchical core-shell nanocomposite of hollow mesoporous carbon spheres enwrapped Ni(OH)2 nanosheets. The Ni(OH)2 nanosheets possess unique small-sized and ultrathin morphology, which endues the resulting nanocomposite with a large specific surface area (481.64 m2 g−1) and good conductivity, thus giving a high specific capacity of 844 C g−1 at a current density of 1 A g−1 with excellent cycling stability and superior rate capability. Furthermore, a hybrid supercapacitor is constructed which presents a high energy density of 45.84 Wh kg−1 at a power density of 799 W kg−1 and delivers an excellent cycling stability of capacitance retention rate of 91.4% after 10,000 cycles at 10 A g−1, demonstrating potential application for high-performance hybrid supercapacitor.
KW - Excellent cycle life
KW - High energy density
KW - Hollow mesoporous carbon spheres
KW - Hybrid supercapacitor
KW - Nickel hydroxide
UR - http://www.scopus.com/inward/record.url?scp=85053199139&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2018.09.022
DO - 10.1016/j.jpowsour.2018.09.022
M3 - Article
AN - SCOPUS:85053199139
SN - 0378-7753
VL - 402
SP - 43
EP - 52
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
