Lithium-ion batteries (LIBs) are undeniably the most promising system for storing electric energy for both portable and stationary devices. A wide range of materials for anodes is being investigated to mitigate the issues with conventional graphite anodes. Among them, TiO2 has attracted extensive focus as an anode candidate due to its green technology, low volume fluctuations (<4%), safety, and durability. In this review, the fabrication of different TiO2 nanostructures along with their electrochemical performance are presented. Different nanostructured TiO2 materials including 0D, 1D, 2D, and 3D are thoroughly discussed as well. More precisely, the breakthroughs and recent developments in different anodic oxidation processes have been explored to identify in detail the effects of anodization parameters on nanostructure morphology. Clear guidelines on the interconnected nature of electrochemical behaviors, nanostructure morphology, and tunable anodic constraints are provided in this review.

Nanostructured anatase TiO2 (NSA‐TiO2) was synthesized via electrochemical anodization of pure Ti foils in a fluorine‐containing electrolyte. The synergistic effects of the anodization period (1 and 2 h) and the surface condition of Ti foils (scratched and unscratched) before anodization was investigated. Four nanostructure variants—unscratched 1 h, unscratched 2 h, scratched 1 h, and scratched 2 h with average pore diameters 15 ± 7.4, 10.1 ± 8.5, 7 ± 7.12, and 8.1 ± 3.79 nm, respectively, were fabricated to assess as negative electrodes of high‐performance lithium‐ion batteries (LIBs). The corresponding first cycle discharge capacities of as‐synthesized NSA‐TiO2 exhibited 433, 93.33, 453.33, and 460.0 mAhg−1. LIB with scratched 1 h NSA‐TiO2 as anode exhibited very propitious outcomes. The reversible capacity at a high 1 C current rate was displayed as 100 mAhg−1 even after 400 cycles along with 103.27% coulombic efficiency. The superior electrochemical performances are attributed to its high specific surface area due to its nanoporous structure. These nanoporous structures provide higher contact between electrodes and electrolytes, shortening the diffusion pathways for conductive ions and electrons that ensured faster kinetics. However, scratching operations increased surface area in the final nanostructure while the short anodization period substantially increased the number of pores.

Recently, lithium-ion batteries (LIBs) have been widely employed in automobiles, mining operations, space applications, marine vessels and submarines, and defense or military applications. As an anode, commercial carbon or carbon-based materials have some critical issues such as insufficient charge capacity and power density, low working voltage, deadweight formation, short-circuiting tendency initiated from dendrite formation, device warming up, etc., which have led to a search for carbon alternatives. Transition metal oxides (TMOs) such as NiO as an anode can be used as a substitute for carbon material. However, NiO has some limitations such as low coulombic efficiency, low cycle stability, and poor ionic conductivity. These limitations can be overcome through the use of different nanostructures. This present study reviews the integration of the electrochemical performance of binder involved nanocomposite of NiO as an anode of a LIB. This review article aims to epitomize the synthesis and characterization parameters such as specific discharge/charge capacity, cycle stability, rate performance, and cycle ability of a nanocomposite anode. An overview of possible future advances in NiO nanocomposites is also proposed.