Effective Suppression of the Polysulfide Shuttle Effect
in Lithium–Sulfur Batteries by Implementing rGO–PEDOT:PSS-Coated
Separators via Air-Controlled Electrospray
Posted on 2018-12-03 - 19:11
Lithium–sulfur (Li–S)
batteries have been earning
significant attention because of their high energy density and cost
efficiency. Albeit these outstanding qualities, the polysulfide shuttling
effect and low electrical conductivity of the sulfur active material
in this battery chemistry results in poor cycling performance. In
an attempt to overcome these problems, a hybrid structure of poly(3,4-ethylenedioxythiophene):poly(styrene
sulfonate) and reduced graphene oxide was developed and coated on
the surface of a conventional separator using air-controlled electrospray.
Implementing these coated separators in Li–S batteries led
to lower polarization and stymied the polysulfide shuttling effect
through the combining effects of electrostatic, physical, and chemical
interactions. Our results reveal that the capacity and rate capacity
are drastically improved via coating the separator, leading to more
than twice the capacity of over 800 mA h g–1 after
100 cycles at 0.5 C rate, when it is compared to those with the pristine
separator. Overall, this hybrid coating material shows great promise
in enhancing the current Li–S battery technology.
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Lee, Jin Hong; Kang, Jisoo; Kim, Seung-Wan; Halim, Willy; W. Frey, Margaret; Joo, Yong Lak (2018). Effective Suppression of the Polysulfide Shuttle Effect
in Lithium–Sulfur Batteries by Implementing rGO–PEDOT:PSS-Coated
Separators via Air-Controlled Electrospray. ACS Publications. Collection. https://doi.org/10.1021/acsomega.8b02551