*Advanced Chalcogen Cathode Materials for Lithium-Ion Batteries DOI: http://dx.doi.org/10.5772/intechopen.103042*

and high rate performance (415 mA h g−1 at 2 A g−1) due to well-designed structure as well as optimized chemical composition with in carbonate-based electrolyte. Synthesized a nanoporous Co and N-co-doped carbon nanoreactor (C–Co–N) provide a high Te loading (77.2 wt%) provide ultrahigh capacity of 2615.2 mA h cm−3 and superior rate performance of 894.8 mA h cm−3 at 20C. Design structure and micro-environmental of Te-based nanoreactors could provide high electrochemical performance.

In the case of flexible batteries, in order to improve electrical conductivity and their mechanical stiffness, researchers made hybride by mixing SA with polyaniline and used as glue for rGO/Mn3O4/S nanocomposite particles electrode films, exhibited a high capacity of 1015(538) mA h gsul(ele) −1 at 5.0 A gsul −1 (B3.0C) and capacity retention of 71% after 500 cycles. The electrospun PCNF–CNT also demonstrated in flexible Li–S batteries as like flexible selenium PCNF–CNT fabricated, battery exhibited reversible capacity of 638(223) mA h gsel(ele) −1 after 80 cycles at 0.05 A gsel −1 (B0.074C). The rGO/Te NW electrode made of 63 wt% tellurium delivers high capacities of 418(263) and 174(110) mAh gtel(ele) −1 at 0.2 and 10C, respectively and excellent long-cyclic performance at a high rate of 1.0C. Therefore, as prepared flexible Te-NWs electrodes are quite attractive over the sulfur and selenium counterparts due to their distinguish features.
