Cross-linked Ni(OH)(2)/CuCo2S4/Ni networks as binder-free electrodes for high performance supercapatteries

The heterogeneous Ni(OH)(2)/CuCo2S4/Ni electrode is constructed by appropriately adjusting the time-dependent hydrothermal and electrodeposition process. A hybrid device exhibits 39.7 W h kg(-1) of specific energy and 365.3 W kg(-1) of specific power, with a good cycling stability of 88% capacity retention after 5000 cycles at 6 A g(-1).