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.

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Calliandra of the family Mimosaceae is represented in India, Bangladesh and Burma by two distinct species. An appraisal of generic relationship and morphological characters has been made from a study of literature and herbarium specimens. An artificial key is given and synonymy and descriptions are provided for each taxon. All specimens seen have been cited. Most species of the genus occur in tropical America. C. umbrosa ssp. umbrosa and ssp. griffithii are concentrated in the eastern Indian region which suggests that the genus has old secondary centre in the SE Asian region. These are probably in the course of extinction. Calliandra cynometroides has restricted distribution in Travancore and Tinnevelly ghat region, S. India. Both the species are generally found in evergreen forests.

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