Excellent electrochemical stability of Co3O4 array with carbon hybridization derived from metal-organic framework

Liu, Qipeng1,2; Zhou, Quan1,2; Gao, Chenshan1,2; Liu, Lian1; Ye, Huaiyu1,2

2021-11-26

10.1088/1361-6528/abedef

NANOTECHNOLOGY   影响因子和分区

0957-4484

1361-6528

Hybrid supercapacitors have attracted considerable attention for the use in the energy storage systems due to the simultaneous possession of high power and energy. Herein, Co3O4 array with amorphous carbon on Ni foam has been derived from the Co-MOF. The electrochemical dynamics and energy storage mechanism of the prepared electrode have been investigated, which reveals the enhancement of the capacitive behavior with the scan rate. The electrochemically active specific surface area (ECSA) of our sample is calculated as 1416 cm(2) for per square centimeter of electrode. The prepared material exhibits an excellent electrochemical performance (3.17 F center dot cm(-2) at 1 mA center dot cm(-2) and 2.076 F center dot cm(-2) at 30 mA center dot cm(-2)). Further, the long-term life shows 96.7% capacity retention at 50 mV center dot s(-1) after 20 000 cycles in KOH aqueous electrolyte. The Coulomb efficiency is noted to range from 95% to 100% even after 20 000 cycles. Further, the symmetrical solid-state supercapacitor represents a wide operating voltage range and high scan rate for practical applications. Three charged solid-state supercapacitors are observed to lit 160 parallel green LEDs (20 mA, 2.2V) for approximately 50 s. These findings from this study confirm the potential of Co3O4 array with carbon hybridization as an effective supercapacitor electrode material.

cobaltosic oxide metal organic framework supercapacitors stability carbon hybridization

SCI ; EI

英语

通讯

National Key R&D Program of China[2018YFE0204600] ; key-Area Research and Development Program of GuangDong Province[2019B010131001] ; National Natural Science Foundationof China[51706029]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000693766000001

IOP PUBLISHING LTD

20213810928822

Amorphous carbon ; Electrolytes ; Energy storage ; Foams ; Metal-Organic Frameworks ; Organometallics ; Potassium hydroxide ; Supercapacitor

Energy Storage:525.7 ; Electric Batteries and Fuel Cells:702 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Amorphous Solids:933.2

MATERIALS SCIENCE

Web of Science

1.Chongqing Univ, Coll Photoelect Engn, Key Lab Optoelect Technol & Syst, Chongqing 400044, Peoples R China
2.Southern Univ Sci & Technol, Engn Res Ctr Integrated Circuits Next Generat Com, Minist Educ, Shenzhen 518055, Peoples R China

Liu, Qipeng,Zhou, Quan,Gao, Chenshan,et al. Excellent electrochemical stability of Co3O4 array with carbon hybridization derived from metal-organic framework[J]. NANOTECHNOLOGY,2021,32(48).

Liu, Qipeng,Zhou, Quan,Gao, Chenshan,Liu, Lian,&Ye, Huaiyu.(2021).Excellent electrochemical stability of Co3O4 array with carbon hybridization derived from metal-organic framework.NANOTECHNOLOGY,32(48).

Liu, Qipeng,et al."Excellent electrochemical stability of Co3O4 array with carbon hybridization derived from metal-organic framework".NANOTECHNOLOGY 32.48(2021).