TY - JOUR
T1 - Ni/Co-based metal organic frameworks rapidly synthesized in ambient environment for high energy and power hybrid supercapacitors
AU - Xu, Fang
AU - Chen, Nan
AU - Fan, Zhaoyang
AU - Du, Guoping
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 51362020 , 21571095 ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/10/30
Y1 - 2020/10/30
N2 - Metal organic framework (MOF)-based electrode materials, which could be rapidly synthesized in ambient environment with low cost but also provide a remarkable high-energy density, are ideal candidates for developing high-performance and cost-effective supercapacitors. Herein, a facile room-temperature solution-phase based method is employed for fast and large-scale synthesis of Ni/Co-based MOFs with low crystallinity, which surprisingly exhibit extraordinary charge storage capability. In particular, the Ni2Co-MOF shows the highest structure disorder and the smallest nanosheet feature size among these MOFs, offers a specific capacity of 2149 mC cm−2 (or 1074.5 C g−1) at a discharge current of 1 mA cm−2, and 1654 mC cm−2 (or 827 C g−1) at 20 mA cm−2. Moreover, with Ni2Co-MOF as the positive electrode and activated carbon as the negative electrode, hybrid supercapacitors operating at 1.6 V deliver superior energy densities of 66.1 and 41.3 W h kg−1 at power densities of 800 and 8000 W kg−1, respectively. The findings in this study provide a promising electrode material for high-performance supercapacitors, and possibly break a new path toward MOF material synthesis in a cost-effective way but with outstanding charge storage capability.
AB - Metal organic framework (MOF)-based electrode materials, which could be rapidly synthesized in ambient environment with low cost but also provide a remarkable high-energy density, are ideal candidates for developing high-performance and cost-effective supercapacitors. Herein, a facile room-temperature solution-phase based method is employed for fast and large-scale synthesis of Ni/Co-based MOFs with low crystallinity, which surprisingly exhibit extraordinary charge storage capability. In particular, the Ni2Co-MOF shows the highest structure disorder and the smallest nanosheet feature size among these MOFs, offers a specific capacity of 2149 mC cm−2 (or 1074.5 C g−1) at a discharge current of 1 mA cm−2, and 1654 mC cm−2 (or 827 C g−1) at 20 mA cm−2. Moreover, with Ni2Co-MOF as the positive electrode and activated carbon as the negative electrode, hybrid supercapacitors operating at 1.6 V deliver superior energy densities of 66.1 and 41.3 W h kg−1 at power densities of 800 and 8000 W kg−1, respectively. The findings in this study provide a promising electrode material for high-performance supercapacitors, and possibly break a new path toward MOF material synthesis in a cost-effective way but with outstanding charge storage capability.
KW - Electrode materials
KW - Hybrid supercapacitor
KW - Low crystallinity
KW - Metal organic framework
KW - Ni/Co-based MOFs
UR - http://www.scopus.com/inward/record.url?scp=85086500394&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.146920
DO - 10.1016/j.apsusc.2020.146920
M3 - Article
AN - SCOPUS:85086500394
VL - 528
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
M1 - 146920
ER -