Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitors

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni3S2 Nanowire Films for High‐Performance Supercapacitors

“…[21] In this study,w ei ntroduced Co ions into Ni@Ni 3 S 2 NWs by af acile ion-exchange process. [21] In this study,w ei ntroduced Co ions into Ni@Ni 3 S 2 NWs by af acile ion-exchange process.…”

“…Metal sulfidess uch as binary cobalt sulfides, molybdenum sulfides, nickel sulfides, and ternary nickel cobalt sulfides (Ni-Co-S) have attracted growingi nterest as new electrode materials for electrochemical energy storageo wing to their superior performances. [21,22] Additionally,t he charge-storage reactions for nickel Metal sulfides have aroused great interest for energy storage. [18][19][20] However,t heir low electrical conductivities often result in unsatisfactory capacity performances and rate capabilities for electrical energy storage.…”

Facile synthesis of CoNi 2 S 4 /Co 9 S 8 composites as advanced electrode materials for supercapacitors

“…Carbon-based materials have been predominantly used for EDLCs, such as mesoporous carbon, activated carbon, carbon aerogel, carbon nanotubes and graphene [14].Transition metals oxides (such as MnO2, NiO, Co3O4, RuO2), chalcogenides (Co9S8, Ni3S2, etc), hydroxides [Co(OH)2, Ni(OH) 2, etc] and conducting polymers (polypyrrole, polyaniline, etc) have been intensively studied as electrode materials for pseudocapacitors [10,[15][16][17]. Among them, ternary nickel cobaltite sulfide (NiCo2S4 or CoNi2S4, denoted as NCS) have been recognized as one of the most promising candidates for electrode materials due to some special characters, such as high electrical conductivity, high electrochemical activity, environmental friendliness and low cost [18,19].…”

Ni@NiO core/shell dendrites for ultra-long cycle life electrochemical energy storage

“…1 Nickel based materials have been identied as promising electrode materials for electrochemical energy storage devices because of their high theoretical specic capacitance ($2584 F g À1 for NiO and 2082 F g À1 for Ni(OH) 2 ), environmental friendliness and low cost. 2,3 With the aim to provide a larger reaction area and shorten ion diffusion paths, many fabrication methods including chemical precipitation, 4,5 hydrothermal synthesis, [6][7][8][9][10][11] sol-gel, 12,13 thermal oxidation [14][15][16] and anodization 17,18 have been used to produce various kinds of nickel-based nanostructures, such as amorphous Ni(OH) 2 nanoboxes, 5 Ni-Co oxide nanowires, 6,19 Ni(OH) 2 nanosheets, 7,11 NiO nanobelts, 8 nanosized rambutan-like NiO, 9 urchin-like NiCo 2 O 4 , 10 spinel nickel cobaltite aerogels, 12 NiO nanoowers, 13 NiO nanoblocks 14 and sponge-like Ni(OH) 2 -NiF 2 composites. 18 Apart from the above methods, electrodeposition has gained more and more attention because the electroactive material can be directly grown on a current collector without the need for using any binder or conducting agent.…”