Partially reduced Co3O4/graphene nanocomposite as an anode material for secondary lithium ion battery

Li3V2(PO4)3/graphene nanocomposite as a high performance cathode material for lithium ion battery

“…The strong interfacial interaction between the LVP nanoparticles and the graphene nanosheets may facilitate the fast transport of charges through the highly conductive graphene nanosheets. In addition, the graphene nanosheets in the nanocomposite significantly suppressed the aggregation and hindered the growth of nanoparticles to a certain extent, possibly due to the partition effect of the graphene nanosheets [31]. It can be also seen that few of the nanoparticles are slightly large in the nanocomposite sample.…”

“…The semicircle in the high frequency region represents the lithium ion migration through the interface between the surface layer of the particles and the electrolyte, known as charge transfer resistance. The straight line in the low-frequency region is attributed to the diffusion of the lithium ions into the bulk of the electrode material, known as Warburg impedance [31]. The radius of the high frequency semicircle of the pure LVP nanoparticles electrode is larger than that of the LVP/graphene nanocomposite electrode, indicating a higher charge transfer resistance in the pure LVP nanoparticles electrode.…”

“…Compared to traditional carbon, graphene nanosheets, a singleatom-thick sheet of honeycomb carbon lattice, show a number of intriguing unique properties, such as superior electrical conductivity, high surface area, large surface-to-volume ratio, and good mechanical properties [31][32][33]. Recently, improved cycling stability and rate performances were reported when an electrode material was supported by graphene [34,35].…”

Synthesis of 2D/2D Structured Mesoporous Co3O4 Nanosheet/N‐Doped Reduced Graphene Oxide Composites as a Highly Stable Negative Electrode for Lithium Battery Applications

“…Reversiblec apacity areas as high as about 1523 and 815 mAh g À1 fort he N-rGO/Co 3 O 4 -NS composite and about 1327 and 790 mAh g À1 for pristine Co 3 O 4 -NS at 80 and 1000 mA g À1 ,r espectively,a re observed. The observed capacity profiles for both pristine and N-rGO/Co 3 O 4 -NS are much higher than the theoretical capacity and can be calculated from Equation (3), [39,40] C theoretical ¼C Co 3 O 4 ½Co 3 O 4 ð in wt %ÞþC carbon ½Cð in wt %Þ…”

Combustion/micropyretic synthesis of atomically thin two-dimensional materials for energy applications

“…For example, combustion-derived Co 3 O 4 nanoparticles (25-50 nm) uniformly deposited on the graphene sheets showed better electrochemical performance than pure Co 3 O 4 [25 ]. The Co 3 O 4 /r-GO electrode delivered an initial charge capacity of 890 mAh g À1 and exhibited 90% capacity retention after 30 cycles.…”