Ni film decorated on Au-Ag alloy line to enhance graphene/cobalt hydroxide electrodes for micro-supercapacitors

Facile and scalable fabrication of flexible micro-supercapacitor with high volumetric performance based on ultrathin Co(OH)2 nanosheets

“…4e. The energy density and power density of the Co-LSG MSC are superior to those of recently reported cobalt-based MSCs, such as PPY-hs@CoS, 59 S-doped CoZnNi–OH/CuCoP/CW, 53 graphene/Co(OH) 2 /Ni, 27 Co–Ni/rGO, 28 αCo(OH) 2 /rGO, 60 Co(OH) 2 , 61 Co(OH) 2 /rGO, 62 and CuO@CoFe LDH. 63 The remarkable performance of the CN-LSG MSC is due to the faster charge transfer kinetics achieved due to the ultrathin Co(OH) 2 NS and superior conductivity provided by the LSG support.…”

“…23 Since the energy density of energy storage devices (E) is determined by the capacitance (C) and operating voltage window (V), i.e., E = 1/2CV 2 , 24 further upgradation of energy density relies on enhancing either of these characteristics. Pseudocapacitive materials such as transition metal oxides, hydroxides, sulphides, and conducting polymers [25][26][27][28][29] have widely emerged in the pursuit of high capacitance due to fast and reversible surface faradaic redox reactions. The surface atoms or a few nanometer-thin layers of the active electrode material play a predominant role in the pseudocapacitive process.…”