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Layered Bimetallic Metal‐Organic Material Derived Cu 2 SnS 3 /SnS 2 /C Composite for Anode Applications in Lithium‐Ion Batteries
Author(s) -
Foley Sarah,
Geaney Hugh,
Bree Gerard,
Mukherjee Soumya,
Zaworotko Michael J.,
Ryan Kevin M.
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800989
Subject(s) - anode , bimetallic strip , materials science , foil method , composite number , electrochemistry , lithium (medication) , metal , chemical engineering , electrode , metallurgy , composite material , chemistry , medicine , engineering , endocrinology
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 Cu 2 SnS 3 /SnS 2 /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 Cu 2 SnS 3 /SnS 2 /C composite was characterised by XRD, TGA, TEM and SEM. Electrochemical analysis was conducted on SnCu 2 SnS 3 /SnS 2 /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.