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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 10
BKCSDE 34(10)
October 20, 2013 

Size-controlled Chevrel Mo6S8 as Cathode Material for Mg Rechargeable Battery
Anna Ryu, Min-Sik Park, Woosuk Cho, Jeom-Soo Kim*, Young-Jun Kim
Rechargeable batteries, Mg trapping, Chevrel Mo6S8, Nanoparticle, Molten salt synthesis
Nanoscale Chevrel Mo6S8 powders are synthesized by molten salt synthesis. Synthesized Mo6S8 powders have different mean particle sizes which are dependent on a ratio of salt to precursor. The particle sizes of Mo6S8 powders changes along with the ratio increase. Mo6S8 (6:1) demonstrates the best electrochemical characteristics among the synthesized Mo6S8 powders although the Mo6S8 (4:1) has the smallest particle size. Mo6S8 (6:1) shows a reversible capacity of 83.9 mAhg−1, which is 27.5% and 33% improved value over Mo6S8 (2:1) and Mo6S8 (4:1) at a current density of 0.2C, respectively. The superior electrochemical properties of Mo6S8 (6:1) are attributed to the balanced particle size which provides proper contact area with electrolyte and the shortened Mg2+ diffusion length. The Mo6S8 (4:1) has the smallest particle size but further reduction of particle size from Mo6S8 (6:1) is not advantageous.
3033 - 3038
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