Tuning kinetics of SnS/NiS binary sulfides for high rate and long cyclic lithium-ion batteries

• Published in: New journal of chemistry 2024-02, Vol.48 (6), p.2755-2763
• Main Authors: Imran, Muhammad, Bokhari, Tanveer Hussain, Wu, Yuefeng, Rana, Zohaib, Gul, Eman, Rahman, Gul, Zafar, Amina, Ali, Tahir, Javaid, Saqib, Hussain, Shafqat, Maaz, Khan, Karim, Shafqat, Ahmad, Mashkoor, Xiang, Guolei, Nisar, Amjad
• Format: Article
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d3nj03862a

Nanomaterials synergy in a binary system offers a great opportunity for the development of high-performance electrode material for Lithium-ion batteries (LiBs). So far SnS/Ni 3 S 4 binary sulfides are scarcely investigated as an anode for LIBs. In this work, to intrinsically enhance the kinetics of SnS, SnS/Ni 3 S 4 (SN- x ) binary sulfides were synthesized by introducing nickel sulfide with different stoichiometric ratios (0.5, 1, 2, and 3). The developed electrode (SN-2) delivers an initial discharge capacity of 2567 mA h g −1 and a high reversible capacity of 360 mA h g −1 at a current rate of 300 mA g −1 after 180 cycles with a Coulombic efficiency of over 97%. The electrochemical impedance spectroscopy (EIS) and density functional theory (DFT) confirm the improved kinetics of the SN-2 electrode as compared to other electrodes. The significantly enhanced performance of the SN-2 electrode can be attributed to the addition of an optimized amount of Ni 3 S 4 , synergistic effects between SnS and Ni 3 S 4 , generation of more active sites and structural integrity. This work suggests that the prepared SnS/Ni 3 S 4 binary sulfides exhibit great promise for the development of efficient energy storage devices. Binary sulfides (SnS/Ni 3 S 4 ) anode of tuned kinetics is reported. The developed electrode delivers enhanced rate performance and cyclic stability due to synergistic effect.