This review highlights the recent research advances in active nanostructured anode materials for the next generation of Li-ion batteries (LIBs). In fact, in order to address both energy and power demands of secondary LIBs for future energy storage applications, it is required the development of innovative kinds of electrodes. Nanostructured materials based on carbon, metal/semiconductor, metal oxides and metal phosphides/nitrides/sulfides show a variety of admirable properties for LIBs applications such as high surface area, low diffusion distance, high electrical and ionic conductivity. Therefore, nanosized active materials are extremely promising for bridging the gap towards the realization of the next generation of LIBs with high reversible capacities, increased power capability, long cycling stability and free from safety concerns. In this review, anode materials are classified, depending on their electrochemical reaction with lithium, into three groups: intercalation/de-intercalation, alloy/de-alloy and conversion materials. Furthermore, the effect of nanoscale size and morphology on the electrochemical performance is presented. Synthesis of the nanostructures, lithium battery performance and electrode reaction mechanisms are also discussed. To conclude, the main aim of this review is to provide an organic outline of the wide range of recent research progresses and perspectives on nanosized active anode materials for future LIBs

This review summarizes the cutting edge advances in the field of textile-based energy storage devices with particular emphasis on the nature and preparation of electrode materials for both supercapacitors and lithium ion batteries. Indeed, due to the overwhelming increase of the worldwide demand for high-tech products, energy storage has become one of the most up-to-date debating topics. In this regard, and considering also the well-known environmental issues often related to the fabrication of new energy products, it is important for the scientific community to develop new electrochemical energy storage systems based on eco-efficient synthetic processes and capable of serving the needs of the next generation of electronics. To this end, textile-based energy storage devices are emerging as a viable alternative to their conventional rigid counterparts. These devices have to be flexible, lightweight and should be compatible with futuristic miniaturized electronic gadgets. We have discussed how supercapacitors and Li-ion batteries are combined with textiles to realize flexible and wearable storage devices. The most important parameters, both from the electrochemical and textile points of view, have been taken into account in order to provide, as much as possible, a standard reference for comparing different kinds of textile-based energy storage devices. These parameters include electrode fibers configuration, fiber diameter, tensile strength, capacitance, charge/discharge capacity, Coulombic efficiency and capacity retention. Furthermore, in this review textile electrodes have been classified into two categories, according to the fabrication strategies: bottom-up and top-down fabrication processes. To conclude, the main aim of this review is to provide an organic outline of the recent research progress and perspectives on textile-based energy storage devices.

Ellagic acid, a naturally occurring polyphenol, extracted from pomegranate husk, is found to be a very good organic electrode material for rechargeable lithium batteries with high reversible capacities of ∼450 and 200 mA h g⁻¹ at C/10 and C/2.5 discharge rates, respectively; ex situ NMR studies reveal possible lithiation–delithiation modes at different stages of the charge–discharge process.