Journal
ACS NANO
Volume 10, Issue 12, Pages 10778-10788Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b04214
Keywords
SnS; SnS2; reduced graphene oxide; lithium ion battery anode
Categories
Funding
- Welch Foundation [F-1131, F-1841, F-1436]
- National Science Foundation [CBET-1603491]
- NSF [DMR-0923096]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1603491] Funding Source: National Science Foundation
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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/LixSn/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 LixSn 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.
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