Highly efficient and stable cryo-ground sulphur cathode for Li-S batteries
ČlánekStatus neznámýpeer-reviewedpostprintDatum publikování
2016
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Elsevier Science BV
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Here we report on a Li-S battery with cathode, based on a S powder obtained from bulk amorphous S, by cryogenic grinding. The cathode was prepared from a slurry, wherein the content of cryo-ground S powder was equal to 80 wt % (corresponds to approximate to 2.26 mg cm(-2)). Other slurry components included carbon Super P, and polyvinylidene fluoride, dispersed in N-methylpyrrolidone. The electrochemical performance of the as-prepared battery was compared to a battery based on an identically prepared paste, but containing reference S powder (with the orthorhombic structure). A longer life cycle, and enhanced capacity per gram, as well as per cm(2) of electrode was revealed for the cryo-ground S-based cathode. The electrochemical results show that the loss in capacity of the cryo-ground S powder cathode was just 3% after 50 cycles, which suggests on a higher stability of S inside the cathode during cycling.
Rozsah stran
p. 293-298
ISSN
0378-7753
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Journal of Power Sources, volume 331, issue: November
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Klíčová slova
Lithium-sulphur battery, Sulphur cathode, Cryogenic grinding, Li-ion batteries, Li-S baterie, katoda na bázi síry, kryogenní mletí, Li-ion baterie