Core‐Shell Architectured Sulfur Coated α‐Fe2O3 Nano‐Sheet Anode for Li‐Ion Battery with Insitu Active Solid Electrolyte Interfacial Layer and Li‐Sulfur Energy Storage Systems

A versatile approach is achieved through the surface coating of sulfur on α‐Fe2O3 nanosheet by microwave treatment that inherently supports the formation of self‐induced active solid electrolyte interface (SEI) layer which effectively protects the electrode surface and enhances the cyclic stability...

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Published in:Batteries & supercaps 2024-06, Vol.7 (6), p.n/a
Main Authors: Kasiviswanathan, Kavibharathy, Prashant Hanamantrao, Desai, Ramakrishnan, Saraswathi, Raj, Sajan, Kumaresan, Lakshmanan, Paulraj, Vivek, Chenrayan, Senthil, Rangasamy, Baskaran, Vediappan, Kumaran
Format: Article
Language:English
Subjects:
active interfacial layer
Anionic-derived Li2SO4
Interfacial mechanism
Li-ion storage
oxygen defects
α-Fe2O3 nanosheet
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Summary:A versatile approach is achieved through the surface coating of sulfur on α‐Fe2O3 nanosheet by microwave treatment that inherently supports the formation of self‐induced active solid electrolyte interface (SEI) layer which effectively protects the electrode surface and enhances the cyclic stability of lithium‐ion battery. The present findings on a sulfur‐coated α‐Fe2O3@S‐2 core‐shell structured anode demonstrates an initial specific capacity of 1194 mAh g−1 at a 0.1 C rate, and an average discharge capacity of 518 mAh g−1 over 20 cycles. Sulfur coating proves the incredible development of an active SEI layer that prevents electrolyte decomposition and the electrode persuades with stable capacity, fast rate capability and retains excellent coulombic efficiency for 500 cycles in LIB. GITT measurements exhibit superior Li+ ion diffusion coefficient DLi+= ${{D}_{{Li}^{+}}={\rm \ }}$ 2.87×10−10 cm2 s−1 at 80 % SOC for the α‐Fe2O3@S‐2 electrode. The in‐depth ex‐situ evaluations uncovered a fascinating self‐assembled active Li2SO4 electrode‐electrolyte interface formation in the sulfur‐coated α‐Fe2O3 electrode that contributes interfacial kinetics. The sulfur coated α‐Fe2O3 electrode exhibits an exceptional high‐rate performance and coulombic efficiency even in lithium‐sulfur battery. This research overthrows sulfur‘s significance in forming an active interfacial bridging SEI layer that facilitates lithium‐ion kinetics across the interface and alleviates undesirable SEI development. Elegant Active Li2SO4 Solid Electrolyte Interface!! A fused interlayer bonded sulfur coating on α‐Fe2O3 nanosheets achieved throughmicrowave technique exhibits significant enhancements of lithium‐ion redox kinetics in LIB as well as LISB. Self‐induced Li2SO4 based active SEI interfacial layer protects the electrode surface from unwanted reactions of electrolyte components and promotes hassle‐free lithium‐ion mobility across the interface. Sulfur coated α‐Fe2O3 electrode offers volume control over redox reactions and facilitates Li+ ion migration among the α‐Fe2O3 nano‐particulates. This contributes good C‐rate capability with long cycle life and high endurance in powering of blue LED, which open up a new avenue to developing a next generation safety free solid‐state Li‐Sulfur mobility.
ISSN:2566-6223
2566-6223
DOI:10.1002/batt.202400018