Nickel cobalt manganese ternary carbonate hydroxide nanoflakes branched on cobalt carbonate hydroxide nanowire arrays as novel electrode material for supercapacitors with outstanding performance

Design of a Scalable Dendritic Copper@Ni2+, Zn2+ Cation-Substituted Cobalt Carbonate Hydroxide Electrode for Efficient Energy Storage

“…The typical GCD curves, CV curves ranging from 0−2 V to 0−4 V and CV curves under different scan rates (Figure S12a−c), demonstrated that the electrochemical window could be widened to 4 V stably, and the device exhibited an energy density of 110.128 W h kg −1 at a power density of 71.693 W kg −1 . The energy and power densities of the device were superior to many results reported previously, including Co 2 (CO 3 )(OH) 2 NDs/NiCo(CO 3 )-(OH) 2 //rGO, 40 Cu(OH) 2 @ZnNi-CoCH //rGO, 19 NiC-oCH16//AC, 25 Co(CO 3 ) 0.5 (OH)/Ni 2 (CO 3 )(OH) 2 //AC, 20 Co-CH@NiCoMn-CH//AC, 21 and LDH-NPs/CH-NWs// AC. 30…”

A flower‐like α‐phase nickel‐cobalt‐manganese hydroxide modified with two‐dimensional Ti3C2 for high performance hybrid supercapacitors

“…The HSC exhibits a specific energy of 41.15 Wh/kg at a specific power of 0.375 kW/kg, and can retain 21.46 Wh/kg even at a high specific power of 7.5 kW/kg. It has superior specific energy compared with previous reported transition metal electrode materials, like Co‐CH@NiCoMn carbonate hydroxide//AC (20.31 Wh/kg at 0.748 kW/kg), [ 22 ] Li‐Ni‐Mn‐Co hydroxide//graphene (30 Wh/kg at 0.377 kW/kg and 3.75 Wh/kg at 15.7 kW/kg), [ 23 ] Ni‐Co LDH//AC (44.3 Wh/kg at 0.425 kW/kg and 24.1 Wh/kg at 4.25 kW/kg), [ 24 ] NiMn LDH@Co 3 O 4 //AG ASC (26.49 Wh/kg at 0.35 kW/kg), [ 25 ] Mn‐Co‐Fe hydroxide//AC (11.4 Wh/kg at 1.125 kW/kg). [ 26 ]…”

High-performance asymmetric supercapacitor based on CdCO3/CdO/Co3O4composite supported on Ni foam

“… 32 Moreover, as a result of the EIS simulation fitting process, two CPE parameters were obtained: a constant-phase element CPE 1 to simulate double-layer capacitance (AC@NF electrode interface), and a pseudo-capacitance CPE 2 of the material redox process (CdCO 3 /CdO/Co 3 O 4 @NF electrode interface). 26 The corresponding CPE parameters ( Q constant phase element with power α , see note of Table 1 ), 35 were extracted. A Warburg impedance element (or diffusion constant) appeared in the equivalent circuit, providing information about the ionic diffusion within the SC.…”

“…have received considerable attention as electro-active materials for high-performance supercapacitors due to high theoretical capacitance and variable compositions. For instance, electrode materials, such as the MoS 2 /NiCo(OH) 2 CO 3 composite (as a nanosheet-assembled 3D flower-like nanostructure), 25 nickel–cobalt–manganese ternary carbonate hydroxide (as ultrathin nanoflakes) 26 and dendritic Co 3 O 4 @Co 2 (CO 3 )(OH) 2 nano-arrays, 27 have been reported to give high-performance energy storage devices.…”