Novel flower-like CoS hierarchitectures: one-pot synthesis and electrochemical properties

Hollow nanospheres of mesoporous Co 9 S 8 as a high-capacity and long-life anode for advanced lithium ion batteries

“…Electrochemical measurements show their outstanding lithiumstorage performance, $1414 mA h g À 1 after 100 cycles at a current density of 100 mA g À 1 . This result is much higher than those in literature [15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Intriguingly, the cycling of these hollow nanospheres presents a typical capacity recovery, which was observed in many transitional metal oxides but less understood [11,14,29].…”

“…Cobalt sulfides as an anode have been receiving attention recently, due to their high electronic conductivity, good thermal stability and high theoretical capacity [7,[15][16][17][18][19][20][21][22][23][24][25][26][27][28]. For instance, rose-like Co 9 S 8 architectures composed of randomly dispersed nano-sheets [17], presented a reversible capacity of 123 mA h g À 1 after 30 cycles at 50 mA g À 1 .…”

“…For instance, rose-like Co 9 S 8 architectures composed of randomly dispersed nano-sheets [17], presented a reversible capacity of 123 mA h g À 1 after 30 cycles at 50 mA g À 1 . This capacity was promoted to $302 mA h g À 1 by flower-like CoS microparticles obtained by a solvothermal reaction [18]. Yolk-shell microspheres of Co 9 S 8 prepared by spray pyrolysis and hightemperature sulfidation, further enhanced the reversible capacity to 634 mA h g À 1 for 100 cycles at 1 A g À 1 [19].…”

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

“…In fact, the electrochemical reaction is based on the multi-electron redox reaction [12]. For instance, Co-based alloys as anodes in alkaline secondary batteries are primarily ascribed to the redox between Co and Co(OH) 2 [13][14][15][16][17][18][19]. Wang et al first reported that the Co-B alloy prepared via a chemical reduction method in an aqueous solution from bivalent cobalt sulfate has a reversible discharge capacity exceeding 300 mAh/g at 100 mA/g in an aqueous KOH solution [9], very close to those of conventional hydrogen storage alloys.…”

Monodisperse rutile microspheres with ultrasmall nanorods on surfaces: Synthesis, characterization, luminescence, and photocatalysis

“…Its advantages include a low growth temperature, low cost, and good potential for scale-up [14,15]. Numerous materials with complex morphologies, such as nanoflowers [16][17][18][19]4], nanotrees [20][21][22], hierarchical microspheres [23][24][25][26][27], and hierarchical tubes [28][29][30][31][32][33][34][35], have been synthesized by this approach. However, achieving various three-dimensional nanostructures still remains a challenge.…”