A study of novel anode material CoS2 for lithium ion battery

Hierarchical Hollow Co9S8 Microspheres: Solvothermal Synthesis, Magnetic, Electrochemical, and Electrocatalytic Properties

“…Figure 12 a shows the first three discharge and charge curves of the Co 9 S 8 hollow spheres with capacities of 910.4, 762.3, and 692.8 mA h g À1 , respectively. Figure 12 b presents a typical curve of the discharge capacity versus the cycle number for cells made from Co 9 S 8 hollow microstructures, and shows that the initial five charge and discharge capacities are higher than the theoretical capacity (539 mA h g À1 ) [36] and capacities of Co 9 S 8 nanoparticles. [36] Therefore, it was speculated that the larger surface area of the Co 9 S 8 hollow spheres could play a role here.…”

“…Figure 12 b presents a typical curve of the discharge capacity versus the cycle number for cells made from Co 9 S 8 hollow microstructures, and shows that the initial five charge and discharge capacities are higher than the theoretical capacity (539 mA h g À1 ) [36] and capacities of Co 9 S 8 nanoparticles. [36] Therefore, it was speculated that the larger surface area of the Co 9 S 8 hollow spheres could play a role here. However, the cycle of charge and discharge capacities of such a sample is not stable because the discharge capacity dropped to 57.37 mA h g À1 after the 20th cycle.…”

“…Due to the potential application of cobalt sulfide as the cathode material of lithium ion batteries, the charge and discharge capabilities of nanosized Co 9 S 8 [19] and CoS 2 [36] have been reported and studied recently. However, the electrochemical properties of the hierarchical Co 9 S 8 hollow microspheres have not yet been reported.…”

Formation of graphene-encapsulated CoS2 hybrid composites with hierarchical structures for high-performance lithium-ion batteries

“…[3][4][5][6][7][8][9][10][11][12][13][14][15] Among them, CoS 2 has attracted considerable attention because of its remarkable specic capacity and thermal stability. [16][17][18][19][20][21][22][23][24] Unfortunately, its low conductivity, large volume expansion and polysulde dissolution in electrolytes hamper its commercialization for the development of LIBs.…”

Rapid microwave-assisted preparation of binary and ternary transition metal sulfide compounds

“…However, FeS 2 has been shown to have compelling, near theoretical performance in secondary cells at slightly elevated temperatures (333 K), particularly when paired with solid [19] or ionic liquid electrolytes [20]. CoS 2 has also been recently revisited for secondary energy storage, but is more promising for supercapacitor applications [21,22,23] longer, resulting in syntheses that require three or more weeks at elevated temperatures [11,27]. [25], and (c) thiospinel CuTi 2 S 4 (F d3m, ICSD collection code 53336) [26] .…”