Facile Synthesis of Hollow Polyhedral (Cubic, Octahedral and Dodecahedral) NiO with Enhanced Lithium Storage Capabilities

Three-Dimensional Carbon Nanotube/Transition-Metal Oxide Sponges as Composite Electrodes with Enhanced Electrochemical Performance

“…In the following cycles, the peak became weaker and moved to 0.94 V, which resulted from textural modifications . In the anodic scan, the weak peak at 1.45 V and the strong peak at 2.26 V were attributed to decomposition of the SEI layer and oxidation of metallic nickel, respectively. − At current densities of 0.2, 0.4, 1, 2, 4, 10, and 20 A g –1 , the specific discharge capacities of the CNT/NiO electrode were 1391, 1248, 1092, 895, 712, 229, and 109 mA h g –1 , respectively (Figure c).…”

“…Recently, transition-metal oxides (TMOs), such as MnO 2 , − NiO, − Fe 2 O 3 , − and Co 3 O 4 , − have attracted widespread attention for their application in lithium-ion batteries (LIBs) because of their high theoretical specific capacity, environmental friendliness, and natural abundance. TMOs are generally considered to be ideal alternatives to graphite anodes (∼372 mA h g –1 ) because it has become more difficult for graphite anodes to meet the increasing market demand for high energy and power density.…”

“…Some strategies have been proposed to address these drawbacks. The fabrication of different nanostructures, such as nanosheets, nanorods, , and hollow structures, ,,,, is beneficial for rapid lithium-ion diffusion because of their high reaction areas. The employment of carbonaceous materials, such as carbon nanofibers, ,− carbon nanotubes (CNTs), graphene, , and reduced graphene oxide (rGO), ,,, has also been proposed owing to their high conductivity and excellent ductility.…”

Controllable synthesis of nanostructured metal oxide and oxyhydroxide materials via electrochemical methods

“…In this case, GRR has been implemented to metal oxide nanoparticles with well-defined shape as a sacrificial-template to grow particles of other metal oxides ( Figure 3D). [77] The importance of particle shape control has been extensively described in the literature with a particular interest in electrocatalysis. [79] Therefore, some attention has been paid to the factors determining the shape of particles of metal oxides [76] and oxyhydroxides [80] applicable in the field of energy conversion.…”

Hard-template-engaged formation of Co2V2O7 hollow prisms for lithium ion batteries

“…With the rapid development of synthetic nanotechnology, many kinds of hollow NPs have been successfully prepared. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] For examples, using Cu 2 O sphere, cubic or octahedral particles as sacricial templates, a series of metal oxide-based spherical or nonspherical nanocages can be prepared; [23][24][25][26] Porous carbon or carbon/metal polyhedrons have been synthesized by directly annealing metal-organic-frameworks (MOFs) as hard templates. [16][17][18][19][20][21][22] Otherwise, MnCO 4 nanocubes, 27 Cu nanowires, 28 ZnSnO 3 nanocubes, 29 graphene nanosheets 30 and et al are also used as the hard templates to construct functional hollow nanomaterials.…”