Design of novel Cu-doped SnS2 on carbon cloth as a binder-free anode to improve high-rate performance of sodium ion battery

Tsai Mu Cheng, Kuan Hsien Lin, Chutima Kongvarhodom, Hung Ming Chen, Sadang Husain, Sibidou Yougbaré, Lu Yin Lin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Tin disulfide (SnS2) is a highly promising anode material for sodium-ion batteries (SIBs) due to its substantial theoretical capacity stemming from alloying reactions and conversion mechanisms. Eliminating non-conductive binders and simplifying fabrication, the binder-free SnS2@carbon cloth (SnS2@CC) electrode is gaining attention. In this study, a one-step solvothermal synthesis was applied to fabricate binder-free SnS2@CC structures as SIB anodes. The electrochemical performance was enhanced by doping copper (Cu) into the SnS2 lattice. Solvothermal duration and Cu doping levels were systematically investigated to optimize the electrochemical properties of anodes. The Cu-doped SnS2@CC (Cu-SnS2@CC) electrodes exhibited superior electrical conductivity and sodium ion diffusion coefficients compared to those for the SnS2@CC electrodes. After 30 cycles, the Cu-SnS2@CC electrode prepared using a 15-h solvothermal process and 2% Cu doping achieved the highest capacity of 1092.8 mA h g−1 at 0.1 A g−1, while the SnS2@CC electrode yielded only 436.4 mA h g−1 under the same conditions. The optimized Cu-SnS2@CC electrode demonstrates excellent rate performance and cycling stability, with a capacity retention of 63% and Coulombic efficiency of 100% after 130 charge/discharge cycles. This research paves the way for high-performance, binder-free SnS2-based anodes in SIBs.

Original languageEnglish
Pages (from-to)9163-9171
Number of pages9
JournalNew Journal of Chemistry
Volume48
Issue number20
DOIs
Publication statusPublished - May 1 2024

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Materials Chemistry

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