Efficient energy storage in mustard husk derived porous spherical carbon nanostructures
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An environment-friendly synthesis of highly porous spherical carbon nanostructures (PSCNs), in situ doped with N and S, from mustard seed waste has been accomplished. The synthesised PSCNs have an interconnected network, abundant active interfaces, heteroatom rich content, and notably high porosity/surface area which are favourable for fast ion transport and efficient charge storage. This active material (PSCN), when employed as a lithium-ion battery (LIB) half-cell anode, shows a specific charge capacity of 714 mA h g−1 at a current density of 100 mA g−1 even after 550 cycles with 112% capacity retention and high restoration capability. Furthermore, PSCN//LiFePO4 full cell LIBs show an excellent performance with a highly reversible capacity of ∼195 mA h g−1 at a current density of 50 mA g−1 for 400 cycles. The PSCN electrode also exhibited a specific capacitance of 257.8 F g−1 at a current density of 0.1 A g−1 with ∼93% capacity retention after 10 000 cycles, when used as an electrochemical supercapacitor in aqueous 3 M KOH electrolyte. This work shows the preparation of high value and advanced carbon nanostructured material from renewable bio-mass waste for high-performance electrochemical energy storage applications.
Pramanik , A , Chattopadhyay , S , De , G & Mahanty , S 2021 , ' Efficient energy storage in mustard husk derived porous spherical carbon nanostructures ' , Materials Advances , vol. Advance Article . https://doi.org/10.1039/d1ma00679g
Copyright © 2021 The Author(s). Published by the Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
DescriptionA. P. thanks CSIR India for a senior research fellowship (Award No. 31/15(136)/2017-EMR-I). S. C. thanks UGC, India for a research fellowship (Award No. F.2-44/2011(SA-I)).
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