Construction of mesoporous Cu-doped Co₉S₈ rectangular nanotube arrays for high energy density all-solid-state asymmetric supercapacitors

Abstract

A self-templating strategy was used to prepare novel mesoporous Cu-doped Co9S8 rectangular nanotube arrays (Cu-Co9S8 NTAs) as an advanced electrode for all-solid-state asymmetric supercapacitors, which deliver a high energy density of 71.93 W h kg−1 at a power density of 750 W kg−1.

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

“…[10,11] In general, the specific capacity can be promoted through the development of novel battery-type electrodes,w hile construction of hybrid supercapacitors (HSCs) canefficiently widenthe voltagewindow. [12] Recently,t ransition metal oxides have been regarded as promising candidates in SCs owing to their low cost, good electroactivity,n atural abundance and high theoretical capacitance. [13,14] Among battery-type electrode materials,c obalt oxides have theoretical specific capacitances higher than 3000 Fg À1 .…”

“…[27][28][29] One-dimensional (1D) structures,i ncluding nanowires,n anofibers (NFs), nanorods and nanotubes, have shown advantages for energy storage with high surface areas and short diffusion paths. [12,30,31] Among various structural designs,h ierarchical tubular heterostructures (HTHSs) built by nano-sized subunits exhibit the potential to realize good performance by combining the merits of both the 1D structures and hierarchical hollow architectures. [32] Specifically,H THSs can maximize the active sites and offer fast transport paths for ions and electrons to boost the rate capability.Atthe same time,the volume variations during the charging-discharging processes can be efficiently alleviated in HTHSs,leading to enhanced stability.…”

Molecule-assisted modulation of the high-valence Co3+ in 3D honeycomb-like CoxSy networks for high-performance solid-state asymmetric supercapacitors

“…Actually, the electrochemical performance of transitional metal-based electrode materials is closely linked to the nature of the outer d states of the metal elements. Regulating the electronic structures of transitional metal cations was well recognized as an effective route to boost the reaction rate and charge capacity [15,16]. Recently, high-valence transition metal species have been found beneficial for the Faradaic redox reactions [17][18][19].…”

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

“…[27][28][29] One-dimensional (1D) structures,i ncluding nanowires,n anofibers (NFs), nanorods and nanotubes,h ave shown advantages for energy storage with high surface areas and short diffusion paths. [12,30,31] Among various structural designs,h ierarchical tubular heterostructures (HTHSs) built by nano-sized subunits exhibit the potential to realize good performance by combining the merits of both the 1D structures and hierarchical hollow architectures. [32] Specifically,H THSs can maximize the active sites and offer fast transport paths for ions and electrons to boost the rate capability.A tt he same time,t he volume variations during the charging-discharging processes can be efficiently alleviated in HTHSs,l eading to enhanced stability.…”