Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Designed synthesis of nickel-cobalt-based electrode materials for high-performance solid-state hybrid supercapacitors
AU - Yang, L.
AU - Lu, X.
AU - Wang, S.
AU - Wang, J.
AU - Guan, X.
AU - Wang, G.
PY - 2020/1/21
Y1 - 2020/1/21
N2 - Supercapacitors with high security, excellent energy and power densities, and superior long-term cycling performance are becoming increasingly essential for flexible devices. Herein, this study has reported a novel method to synthesize CoNi 2S 4, which delivered a high specific capacitance of 1836.6 F g -1 at 1 A g -1, with a slight fluctuation in the testing temperature rising up to 50 °C (1855.2 F g -1) or decreasing to 0 °C (1587.6 F g -1). In addition, the corresponding solid-state CoNi 2S 4//AC HSC could achieve a high energy density of 35.8 W h kg -1 at a power density of 800.0 W kg -1, with nearly no change when tested at 0 °C and 50 °C, and possessed excellent long-term electrochemical cycling stability of 132.3% after 50;000 cycles; the solid-state hybrid supercapacitor using biomass-derived carbon (BC) as the negative electrode (CoNi 2S 4//BC HSC) could also deliver a high energy density of 38.9 W h kg -1 at a power density of 850.0 W kg -1 and the specific capacitance retention was 101.2% after cycling for 50;000 times. This work has provided a promising method to prepare high-performance electrode materials for solid-state hybrid supercapacitors with superior cycling stability and energy density.
AB - Supercapacitors with high security, excellent energy and power densities, and superior long-term cycling performance are becoming increasingly essential for flexible devices. Herein, this study has reported a novel method to synthesize CoNi 2S 4, which delivered a high specific capacitance of 1836.6 F g -1 at 1 A g -1, with a slight fluctuation in the testing temperature rising up to 50 °C (1855.2 F g -1) or decreasing to 0 °C (1587.6 F g -1). In addition, the corresponding solid-state CoNi 2S 4//AC HSC could achieve a high energy density of 35.8 W h kg -1 at a power density of 800.0 W kg -1, with nearly no change when tested at 0 °C and 50 °C, and possessed excellent long-term electrochemical cycling stability of 132.3% after 50;000 cycles; the solid-state hybrid supercapacitor using biomass-derived carbon (BC) as the negative electrode (CoNi 2S 4//BC HSC) could also deliver a high energy density of 38.9 W h kg -1 at a power density of 850.0 W kg -1 and the specific capacitance retention was 101.2% after cycling for 50;000 times. This work has provided a promising method to prepare high-performance electrode materials for solid-state hybrid supercapacitors with superior cycling stability and energy density.
U2 - 10.1039/c9nr08156a
DO - 10.1039/c9nr08156a
M3 - Journal article
VL - 12
SP - 1921
EP - 1938
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 3
ER -