Nanoporous CuCo₂S₄ Microspheres: A Novel Positive Electrode for High-Performance Hybrid Energy Storage Devices

Abstract

Demands for safer, faster, and more efficient energy storage systems have motivated researchers to design and develop new electrode materials. Ternary transition metal oxides are the electrode materials commonly investigated for application in energy storage systems. Nevertheless, the low active surface area and poor conductivity limit their electrochemical performances. In the present study, nanoporous CuCo2S4 microspheres (CCS) electrode has been successfully prepared via a facile self-template method for high-performance hybrid energy storage devices. An ultrahigh specific capacitance of 1566 F g–1 at 2 A g–1 and a superb cycling performance of 95.7% retention after 5000 GCD cycles have been obtained for this electrode. In addition, when this CCS electrode is assembled with an activated carbon (AC) electrode, the as-fabricated asymmetric supercapacitor delivers outstanding performance with maximum power and energy densities of 16 and 43.65 W h kg–1, respectively, which is superior to conventional supercapacitors. The fabricated supercapacitor can light two green LEDs for more than 15 min. This work sheds a further light on the design of efficient electrodes which can be utilized in the next generation of high-performance hybrid energy storage devices.

Designing an Advanced Supercapattery Based on CuCo2S4@Ni−Mo−S Nanosheet Arrays

“…The XRD pattern of CCS/NF electrode (green pattern) demonstrates peaks at ≈16.22°, 26.73°, 31.72°, 38.03°, 47.05°, 50.13°, and 55.17°, corresponding to (111), (022), (113), (004), (224), (115) and (044) crystalline CCS planes (JCPDS Card No. 42–1450) . In the case of NMS/NF electrode (red pattern), the peaks centered at 14.13°, 33.23° and 58.53° corresponding to (002), (100) and (110) crystalline of MoS 2 (JCPDS no.…”

“…Among which, CuCo 2 S 4 (CCS) has attracted great consideration as a favorable sulfospinel for SCs. Abdi et al . fabricated a CCS via a hydrothermal strategy with satisfied C s of 1566 F g −1 .…”

Highly improved supercapacitance properties of MnFe2O4 nanoparticles by MoS2 nanosheets

“…Among various transition metals 17 , nickel, manganese, and cobalt are promising in the field of supercapacitors due to their high electrochemical activity and low cost as well as the abundance of their oxide/hydroxide compounds 18 – 24 . It has also been demonstrated that the spinel ferrites of these metals (MFe 2 O 4 , M is a transition metal) deliver much better electrochemical performance due to their richer valence electron, different redox states, synergistic effects between their metal ions, electrochemical stability, and chemical and mechanical stability, suitable for batteries and supercapacitors 14 , 25 – 29 . Recently, we have compared the supercapacitance of MnFe 2 O 4 , CoFe 2 O 4 , and NiFe 2 O 4 nanoparticles, and found that MnFe 2 O 4 exhibits better supercapacitance properties 14 , 15 .…”

Hierarchical Ni–Co–Mn hydroxide hollow architectures as high-performance electrodes for electrochemical energy storage

“…Moreover, all the CV proles practically have homologous appearances, which demonstrates that the fabricated ASC device delivers notable reversibility and rate capability. 37 The GCD proles shown in Fig. 6b display a symmetrical under different current densities, representing the superior rate capability and electrochemical reversibility of the ASC device.…”