Rational Design of 3D Honeycomb-Like SnS2 Quantum Dots/rGO Composites as High-Performance Anode Materials for Lithium/Sodium-Ion Batteries

Yingge Zhang, Yan Guo, Yange Wang, Tao Peng, Yang Lu, Rongjie Luo, Yangbo Wang, Xianming Liu, Jang Kyo Kim, Yongsong Luo

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Structure pulverization and poor electrical conductivity of metal dichalcogenides result in serious capacity decay both in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). To resolve the above problems, a combination of metal dichalcogenides with conductive scaffolds as high-performance electrode materials has aroused tremendous interest recently. Herein, we synthesize a 3D honeycomb-like rGO anchored with SnS2 quantum dots (3D SnS2 QDs/rGO) composite via spray-drying and sulfidation. The unique 3D-ordered honeycomb-like structure can confine the volume change of SnS2 QDs in the lithiation/delithiation and sodiation/desodiation processes, provide enough space for electrolyte reservoirs, promote the conductivity of the SnS2 QDs, and improve the electron transfer. As a result, the 3D SnS2 QDs/rGO composite electrode delivers a high capacity and long cycling stability (862 mAh/g for LIB at 0.1 A/g after 200 cycles, 233 mAh/g for SIB at 0.5 A/g after 200 cycles). This study provides a feasible synthesis route for preparing 3D-ordered porous networks in varied materials for the development of high-performance LIBs and SIBs in future.

Original languageBritish English
Article number389
JournalNanoscale Research Letters
Volume13
DOIs
StatePublished - 2018

Keywords

  • Lithium-ion batteries
  • rGO
  • SnS quantum dots
  • Sodium-ion batteries
  • Spray drying

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