Unveiling the recent advancements in core shell hybrid electrodes based on metal phosphates; metal compounds for hybrid supercapacitors

초록

Supercapacitors' unique characteristics have made them a viable energy storage option that can either replace or supplement batteries in situations that demand high power output. Achieving a large surface area (Sa) along with excellent conductivity to provide multiple Faradaic reaction sites and accelerate charge transfer is among the many approaches to improve the SCs' electrocapacitive performance. This can be achieved by designing coreshell structure. For a deeper comprehension of the core-shell structure, this review strives to recapitulate the developments made recently on core-shell structures for asymmetric supercapacitor (ASC) applications. Additionally, the preparation strategies, electrochemical performances and structural stabilities of core-shell materials for ASCs are summarized. Among the best options to address here are metal oxide with metal oxide shell, metal oxide with conducting polymer shell, metal sulfide with oxide shell, metal sulfide with conducting polymer shell and phosphate-based core-shell architectures. Furthermore, future directions and challenges in the development of core-shell nanomaterials have also been highlighted.

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