Construction of hierarchical core-shell ZnCo2O4@Ni-Co-S nanosheets with a microsphere structure on nickel foam for high-performance asymmetric supercapacitors

Ni Foam Substrates Modified with a ZnCo2O4 Nanowire-Coated Ni(OH)2 Nanosheet Electrode for Hybrid Capacitors and Electrocatalysts

“…nanosheets with a specific capacitance of 881.3 C g −1 at 1 A g −1 and a capacitance retention of 92.4%. 17 Through a facile template route, yolk−shell-shaped nanospheres of ZnCo 2 O 4 @ ZnCo-LDH were synthesized, which demonstrates 375 mV over potential and 73 mV dec −1 Tafel slope. 18 We fabricated hybrid structured ZnCo 2 O 4 /CoMoO 4 on Ni foam, in a previous paper, which exhibited a capacitance of 903 C g −1 at 1 A g −1 and an 85.1% capacitance retention after 7000 cycles.…”

“…demonstrated the two-step water bath synthesis of ZnCo 2 O 4 @NiMoO 4 nanoarrays, which have a particular capacitance of 906 C g –1 at 1 A g –1 . Wu’s team demonstrate the synthesis of core–shell-structured ZnCo 2 O 4 @Ni-Co-S nanosheets with a specific capacitance of 881.3 C g –1 at 1 A g –1 and a capacitance retention of 92.4% . Through a facile template route, yolk–shell-shaped nanospheres of ZnCo 2 O 4 @ZnCo-LDH were synthesized, which demonstrates 375 mV over potential and 73 mV dec –1 Tafel slope .…”

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

“…17−21 Among them, ZnCo 2 O 4 electrode materials are considered candidates owing their high theoretical capacity. 22,23 In the literature, several ZnCo 2 O 4 electrode structures with high capacitance are reported. 24−26 However, these single electrodes exhibit low electrical conductivity and cycling stability.…”

“…However, traditional cathode materials show poor conductivity. − Hence, selection and design of ideal materials as the cathode is an important task. Recently, several typical transition metal oxides are comprehensively studied. − Among them, ZnCo 2 O 4 electrode materials are considered candidates owing their high theoretical capacity. , In the literature, several ZnCo 2 O 4 electrode structures with high capacitance are reported. − However, these single electrodes exhibit low electrical conductivity and cycling stability.…”

Recent progress in ZnCo2O4 and its composites for energy storage and conversion: a review

“…Despite delivering relatively low specific capacitance, the slurry-casted ZnCo2O4/MnCo2O4 heterojunction nanosheets electrodes 103 ZnCo2O4 in composite architectures. In this perspective, there are binder-free electrodes based on core@shell ZnCo2O4@ZnxCo3-xS4 materials, such as flower-like ZnCo2O4@ZnCo2S4 arrays//NF (1057.78 F g -1 at 1 A g -1 ) 113 and ZnCo2O4@Zn-Co-S hybrid arrays//CNTFs (~ 1.35 F cm −2 at 0.5 mA cm −2 ) 114 and microsphere-structured ZnCo2O4@Ni-Co-S nanosheets (1762.6 F g -1 at 1 A g -1 ) 118 electrodes. The flower-like ZnCo2O4@ZnCo2S4//NF 113 (Figure 7E) delivered good specific capacitance and, even so the hierarchical micro-nanostructured features can further improve the electrochemical properties of the electrode by offering larger spacing for the penetration of electrolyte into the structure.…”