Simple Synthesis of Nanocrystalline Tin Sulfide/N-Doped Reduced Graphene Oxide Composites as Lithium Ion Battery Anodes

Duck Hyun Youn; Shannon K Stauffer; Penghao Xiao; Hunmin Park; Yejin Nam; Andrei Dolocan; Graeme Henkelman; Adam Heller; C Buddie Mullins

doi:10.1021/acsnano.6b04214

Simple Synthesis of Nanocrystalline Tin Sulfide/N-Doped Reduced Graphene Oxide Composites as Lithium Ion Battery Anodes

ACS Nano. 2016 Dec 27;10(12):10778-10788. doi: 10.1021/acsnano.6b04214. Epub 2016 Nov 29.

Authors

Duck Hyun Youn¹, Shannon K Stauffer², Penghao Xiao², Hunmin Park³, Yejin Nam¹, Andrei Dolocan⁴, Graeme Henkelman², Adam Heller¹, C Buddie Mullins^{1

4}

Affiliations

¹ Department of Chemical Engineering and Department of Chemistry, Center for Electrochemistry, University of Texas at Austin , 1 University Station, C0400 Austin, Texas 78712-0231, United States.
² Department of Chemistry and the Institute for Computational Engineering and Sciences, University of Texas at Austin , Austin, Texas 78712-0165, United States.
³ Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, 790-784, South Korea.
⁴ Texas Materials Institute, University of Texas at Austin , Austin, Texas 78712-1591, United States.

PMID: 28024327
DOI: 10.1021/acsnano.6b04214

Abstract

Composites of nitrogen-doped reduced graphene oxide (NRGO) and nanocrystalline tin sulfides were synthesized, and their performance as lithium ion battery anodes was evaluated. Following the first cycle the composite consisted of Li₂S/Li_xSn/NRGO. The conductive NRGO cushions the stress associated with the expansion of lithiation of Sn, and the noncycling Li₂S increases the residual Coulombic capacity of the cycled anode because (a) Sn domains in the composite formed of unsupported SnS₂ expand only by 63% while those in the composite formed of unsupported SnS expand by 91% and (b) Li percolates rapidly at the boundary between the Li₂S and Li_xSn nanodomains. The best cycling SnS₂/NRGO-derived composite retained a specific capacity of 562 mAh g^-1 at the 200th cycle at 0.2 A g^-1 rate.

Keywords: SnS; SnS2; lithium ion battery anode; reduced graphene oxide.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't