Tin dioxide (SnO) has been the focus of attention in recent years owing to its high theoretical capacity (1494 mAh g). However, the application of SnO has been greatly restricted because of the huge volume change during charge/discharge process and poor electrical conductivity. In this paper, a composite material composed of SnO and S, N co-doped carbon (SnO@SNC) was prepared by a simple solid-state reaction. The as-prepared SnO@SNC composite structures show enhanced lithium storage capacity as compared to pristine SnO. Even after cycling for 1000 times, the as-synthesized SnO@SNC can still deliver a discharge capacity of 600 mAh g (current density: 2 A g). The improved electrochemical performance could be attributed to the enhanced electric conductivity of the electrode. The introduction of carbon could effectively improve the reversibility of the reaction, which will suppress the capacity fading resulting from the conversion process.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877561 | PMC |
| http://dx.doi.org/10.3390/nano12040700 | DOI Listing |
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