TY - JOUR
T1 - In-situ fabricating MnO2 and its derived FeOOH nanostructures on mesoporous carbon towards high-performance asymmetric supercapacitor
AU - Chen, Yuxiang
AU - Jing, Chuan
AU - Fu, Xin
AU - Shen, Man
AU - Cao, Tong
AU - Huo, Wangchen
AU - Liu, Xiaoying
AU - Yao, Hong Chang
AU - Zhang, Yuxin
AU - Yao, Kexin
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was sponsored by the Graduate Research and innovation of Chongqing, China (Grant No. CYB18002), the National Natural Science Foundation of China (Grant No. 21576034), the State Education Ministry and Fundamental Research Funds for the Central Universities (2019CDQYCL042, 2018CDYJSY0055, 106112017CDJXSYY0001, 106112017CDJQJ138802, 106112017CDJSK04XK11, and 2018CDQYCL0027), the Joint Funds of the National Natural Science Foundation of China-Guangdong (Grant No. U1801254). The authors would like to thank the help from Electron Microscopy Center in Chongqing University for material characterization.
PY - 2019/10/18
Y1 - 2019/10/18
N2 - Asymmetric supercapacitors with high energy density have received increasing attention in the past decade in order to meet the requirements of practical applications. The mesoporous carbon (SBA-C) with ordered parallel channels prepared using mesoporous silica as a hard template was wrapped with the ultrathin MnO2 nanosheets to construct a 3D hierarchical porous structure through a self-limiting reaction and the FeOOH nanoneedles were successfully derived by template-engaged redox etching using in-situ fabricating MnO2 nanosheet templates. The interesting hierarchical porous construction presents fast transfer paths of ions and electrons, good electrical conductivity, and high specific surface area. The as-fabricated nanohybrids exhibit high specific capacitance (219.7 F g−1 at 1 A g−1 of MnO2@SBA-C and 240.6 F g−1 at 2 A g−1 of FeOOH@SBA-C), good rate performance, and outstanding cycling stability. An asymmetric supercapacitor is assembled by using MnO2@SBA-C and FeOOH@SBA-C as the negative and positive electrode, which delivers a high energy density of 39.4 and 14.2 Wh kg−1 at a power density of 500 and 8000 W kg−1, respectively. The above satisfactory performance exhibits that in-situ fabricating MnO2 nanosheets and its derived FeOOH nanoneedles on mesoporous carbon present great potential to meet the energy/power characteristics of asymmetric supercapacitor in practical applications.
AB - Asymmetric supercapacitors with high energy density have received increasing attention in the past decade in order to meet the requirements of practical applications. The mesoporous carbon (SBA-C) with ordered parallel channels prepared using mesoporous silica as a hard template was wrapped with the ultrathin MnO2 nanosheets to construct a 3D hierarchical porous structure through a self-limiting reaction and the FeOOH nanoneedles were successfully derived by template-engaged redox etching using in-situ fabricating MnO2 nanosheet templates. The interesting hierarchical porous construction presents fast transfer paths of ions and electrons, good electrical conductivity, and high specific surface area. The as-fabricated nanohybrids exhibit high specific capacitance (219.7 F g−1 at 1 A g−1 of MnO2@SBA-C and 240.6 F g−1 at 2 A g−1 of FeOOH@SBA-C), good rate performance, and outstanding cycling stability. An asymmetric supercapacitor is assembled by using MnO2@SBA-C and FeOOH@SBA-C as the negative and positive electrode, which delivers a high energy density of 39.4 and 14.2 Wh kg−1 at a power density of 500 and 8000 W kg−1, respectively. The above satisfactory performance exhibits that in-situ fabricating MnO2 nanosheets and its derived FeOOH nanoneedles on mesoporous carbon present great potential to meet the energy/power characteristics of asymmetric supercapacitor in practical applications.
UR - http://hdl.handle.net/10754/660185
UR - https://linkinghub.elsevier.com/retrieve/pii/S0169433219329393
UR - http://www.scopus.com/inward/record.url?scp=85073986770&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.144123
DO - 10.1016/j.apsusc.2019.144123
M3 - Article
SN - 0169-4332
VL - 503
SP - 144123
JO - Applied Surface Science
JF - Applied Surface Science
ER -