Jump to main content
Jump to site search

Issue 3, 2018
Previous Article Next Article

Electrospray synthesis of nano-Si encapsulated in graphite/carbon microplates as robust anodes for high performance lithium-ion batteries

Author affiliations

Abstract

Developing efficient Si-based anode materials for new-generation lithium-ion batteries (LIBs) has drawn extensive attention. Here, an electrosprayed Si/graphite/carbon (Si/G/C) composite is explored as a prominent anode material for LIBs. The designed Si/G/C composite possesses a reasonable structure with nano-Si encapsulated in the conductive graphite flake/amorphous carbon framework. The Si/G/C composite achieves superior reversible Li+ storage capability, showing a considerable discharge capacity of 832 mA h g−1 at 200 mA g−1. Moreover, it realizes an encouraging capacity of ca. 400 mA h g−1 under a high current density of 500 mA g−1 after 200 cycles. The excellent capacity and rate performance can be attributed to the structural benefits of the Si/G/C composite: (i) the highly conductive graphite flakes serve as good dispersive scaffolds and electronic conductors, allowing for fast charge transfer and favorable ion diffusion; (ii) the amorphous carbon layer acts as a protective coating to bind/fix nano-Si onto graphite and reduce the formation of unstable solid electrolyte interphase (SEI) film; and (iii) both the layered graphite and amorphous carbon layer introduce adequate buffer space or voids to alleviate the volume changes of Si during the Li+ insertion/extraction cycles. This high-capacitive and robust Si/graphite-based hybrid is attractive as an alternative anode material for practical rechargeable LIBs.

Graphical abstract: Electrospray synthesis of nano-Si encapsulated in graphite/carbon microplates as robust anodes for high performance lithium-ion batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Nov 2017, accepted on 10 Jan 2018 and first published on 10 Jan 2018


Article type: Paper
DOI: 10.1039/C7SE00542C
Citation: Sustainable Energy Fuels, 2018,2, 679-687
  •   Request permissions

    Electrospray synthesis of nano-Si encapsulated in graphite/carbon microplates as robust anodes for high performance lithium-ion batteries

    W. Liu, Y. Zhong, S. Yang, S. Zhang, X. Yu, H. Wang, Q. Li, J. Li, X. Cai and Y. Fang, Sustainable Energy Fuels, 2018, 2, 679
    DOI: 10.1039/C7SE00542C

Search articles by author

Spotlight

Advertisements