期刊
CHEMELECTROCHEM
卷 5, 期 23, 页码 3764-3770出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201800989
关键词
carbon; copper tin sulfides; lithium-ion batteries; metal-organic; material nanocomposites
资金
- Science Foundation Ireland (SFI) [13/RP/B2549, 11-PI-1148]
- Enterprise Ireland [CF20144014]
Here, we report the synthesis of a bimetallic 2D interpenetrated metal-organic material (MOM) and its use as a sacrificial precursor for the formation of a Cu2SnS3/SnS2/C composite. The one-step sulfurisation of the novel Sn/Cu-MOM represents a facile method for the preparation of an effective anode material for Li-ion battery applications. The Cu2SnS3/SnS2/C composite was characterised by XRD, TGA, TEM and SEM. Electrochemical analysis was conducted on SnCu2SnS3/SnS2/C anodes in half cell configurations between 0-3 V and 0-1 V. Anodes cycled between 0-1 V exhibited markedly more stable capacity retention (315 mAh/g after 100 cycles), as only alloying of the Li with Sn took place within this potential window, compared to a combination of conversion and alloying for the wider potential range. This stability of the Li alloying based capacity was further enhanced by replacing the planar Cu foil with a rough dendritic Cu foil as the current collector, resulting in an improved capacity retention of 84 % after 100 cycles.
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