Synthesis and lithium storage properties of MoS2 nanoparticles prepared using supercritical ethanol

Title
Synthesis and lithium storage properties of MoS2 nanoparticles prepared using supercritical ethanol
Authors
Koppala Siva KumarWenying LiMugyeom Choi김승민김재훈
Keywords
MoS2; supercritical ethanol; lithium ion battery
Issue Date
2016-02
Publisher
Chemical engineering journal
Citation
VOL 285, 517-527
Abstract
Nanostructured MoS2 particles were synthesized in a very short reaction time of 10 min via a simple supercritical ethanol route for prospective application as an anode material for lithium ion batteries. The as-synthesized MoS2 nanoparticles had a randomly oriented nanoplate structure with a Brunauer–Emmett–Teller (BET) surface area of 67.7 m2 g−1 and a porosity of 59.6%. The as-synthesized samples were subjected to calcination at various temperatures in the range of 500–800 °C under H2S/Ar and evaluated for use as anode materials in Li ion batteries. Increasing the calcination temperature from 500 to 800 °C led to a decrease of the interlayer distance from 0.68 to 0.61 nm and a decrease of the BET surface area from 44.8 to 7.53 m2 g−1. The samples calcined at low temperature delivered larger initial capacities (977–1342 mAh g−1), while the samples calcined at high temperature exhibited better cycling performance and higher first coulombic efficiency (86–89%). MoS2 calcined at 700 and 800 °C gave rise to reversible discharge capacities of 754 and 818 mAh g−1 at 100 mA g−1, respectively, without the use of composite structures or carbonaceous supports.
URI
http://pubs.kist.re.kr/handle/201004/50651
ISSN
13858947
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KIST Publication > Article
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