Development of Metal Sulfide Base Nanostructured Anode Material for Li-Ion Batteries

Abstract

Multifunctional properties of ternary composites play an important role in fabricating high performance energy storage devices. This study explores the benefits of SnS:ZnS@g-C3N4 ternary composite in the development of lithium-ion batteries (LIBs). In this regard, SnS:ZnS@g-C3N4 composite is synthesized through facile solvothermal process with subsequent thermal treatments and investigated for LIBs. The porous nature and increased conductivity provide an opportunity to boost the lithium storage capabilities of SnS:ZnS@g-C3N4 composite. The anchoring of SnS:ZnS heterostructure on the graphitic carbon nitride (g-C3N4) exploits the synergistic effects between components to overcome the volume expansion occurs in anode material. It is found that the fabricated anode achieves a remarkable initial discharge capacity of 1623 mAhg-1 . Moreover, the electrode maintains a robust reversible capacity of 1045 mAhg-1 at 0.3C over 800 cycles. In contrast, the pristine SnS:ZnS, SnS and ZnS anode shows exponential decline in specific capacity at 0.3C. In addition, the impedance measurements reveal that SnS:ZnS@g-C3N4 exhibits enhanced kinetics as compared to pristine SnS, ZnS, and SnS:ZnS. These findings highlight the superior electrochemical performance of SnS:ZnS@g-C3N4 as an anode material for lithium-ion batteries and offers a strategic pathway towards the development of advanced anode materials that addressing key challenges in the field of lithium-ion battery technology