부산대학교 도서관

To develop advanced anode materials for Li-ion batteries (LIB), an extensive research effort is being employed. The effort focuses much on silicon-based anodes due to its high theoretical capacity. However, drawbacks exist such as low practical capacity, limited lithium diffusion, volume expansion, and stress-induced material damage, which retard the utilization of Si in LIB. To circumvent the above-stated issues, we developed a hetero-structure using silicon nitride (Si.sub.3N.sub.4) and molybdenum disulfide (MoS.sub.2) as an anode for LIB. The developed Si.sub.3N.sub.4@MoS.sub.2 hetero-structure exhibits excellent initial capacity with better cycling stability than the pristine Si.sub.3N.sub.4. The tremendous electrochemical performance is attributed to (i) the formation of hetero-structure, as well as enhanced surface area (ii) The Si.sub.3N.sub.4@MoS.sub.2 forms a suitable solid electrolyte interface (SEI) by improving the electrode wettability attributed to its high polar nature (iii) The structural advantage of Si.sub.3N.sub.4@MoS.sub.2, it shortens the Li.sup.+transport path and improves the charge transfer and (iv) The highly abundant active sites of Si.sub.3N.sub.4@MoS.sub.2 improve the electrochemical performances. Graphical abstract
Author(s): Gnanavel Angamuthu [sup.1], Debasish Mohanty [sup.1], Venkatesan Rengarajan [sup.1] Author Affiliations: (1) grid.412517.4, 0000 0001 2152 9956, Advanced Materials Research Laboratory, Department of Chemistry, School of Physical Chemical and [...]