Structural Design and Synthesis of an SnO2@C@Co-NC Composite as a High-Performance Anode Material for Lithium-Ion Batteries

Qiongguang Li, Yanhong Wang*, Qiangqiang Tan, Ziyi Zhong, Fabing Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

To overcome the drawbacks of the structural instability and poor conductivity of SnO2-based anode materials, a hollow core–shell-structured SnO2@C@Co-NC (NC=N-doped carbon) composite was designed and synthesized by employing the heteroatom-doping and multiconfinement strategies. This composite material showed a much-reduced resistance to charge transfer and excellent cycling performance compared to the bare SnO2 nanoparticles and SnO2@C composites. The doped heteroatoms and heterostructure boost the charge transfer, and the porous structure shortens the Li-ion diffusion pathway. Also, the volume expansion of SnO2 NPs is accommodated by the hollow space and restricted by the multishell heteroatom-doped carbon framework. As a result, this structured anode material delivered a high initial capacity of 1559.1 mA h g−1 at 50 mA g−1 and an initial charge capacity of 627.2 mA h g−1 at 500 mA g−1. Moreover, the discharge capacity could be maintained at 410.8 mA h g−1 after 500 cycles with an attenuation rate of only 0.069 % per cycle. This multiconfined SnO2@C@Co-NC structure with superior energy density and durable lifespan is highly promising for the next-generation lithium-ion batteries.

Original languageEnglish
Pages (from-to)12882-12890
Number of pages9
JournalChemistry - A European Journal
Volume26
Issue number56
DOIs
StatePublished - 6 Oct 2020

Keywords

  • core–shell structures
  • doping
  • electrochemistry
  • nanoparticles
  • nanostructures

Fingerprint

Dive into the research topics of 'Structural Design and Synthesis of an SnO<sub>2</sub>@C@Co-NC Composite as a High-Performance Anode Material for Lithium-Ion Batteries'. Together they form a unique fingerprint.

Cite this