TY - JOUR
T1 - Electrostatic shield effect
T2 - An effective way to suppress dissolution of polysulfide anions in lithium-sulfur battery
AU - Sun, Zhenjie
AU - Xiao, Min
AU - Wang, Shuanjin
AU - Han, Dongmei
AU - Song, Shuqin
AU - Chen, Guohua
AU - Meng, Yuezhong
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2014/10/14
Y1 - 2014/10/14
N2 - Sulfur has a very high theoretical specific capacity of 1672 mA h g-1when used in lithium-sulfur batteries. However, the particularly rapid capacity reduction owing to the dissolution of intermediate polysulfide anions into the electrolyte still hinders practical application. In this respect, we report a novel core-shell structured sulfur-poly(sodium p-styrenesulfonate) (S@PSS) composite cathode material with a sulfur content as high as 93 wt% for lithium-sulfur batteries, which is the highest sulfur content disclosed in the literature. Due to the effective transport of lithium cations while blocking polysulfide anions by common ion Coulombic repulsion of the negatively charged -SO3-groups in the PSS protective layer, the S@PSS composite cathode exhibits a high initial specific capacity of 1159 mA h g-1at a 0.1 C rate, and retains a stable discharge capacity of 972 mA h g-1after 70 cycles and 845 mA h g-1after 120 cycles with a high Coulombic efficiency of over 99%. To our knowledge, this new methodology for lithium-sulfur cathodes has not been reported so far; the initial specific capacity is the highest value calculated based on total composite mass, which has not been disclosed in the literature. This journal is
AB - Sulfur has a very high theoretical specific capacity of 1672 mA h g-1when used in lithium-sulfur batteries. However, the particularly rapid capacity reduction owing to the dissolution of intermediate polysulfide anions into the electrolyte still hinders practical application. In this respect, we report a novel core-shell structured sulfur-poly(sodium p-styrenesulfonate) (S@PSS) composite cathode material with a sulfur content as high as 93 wt% for lithium-sulfur batteries, which is the highest sulfur content disclosed in the literature. Due to the effective transport of lithium cations while blocking polysulfide anions by common ion Coulombic repulsion of the negatively charged -SO3-groups in the PSS protective layer, the S@PSS composite cathode exhibits a high initial specific capacity of 1159 mA h g-1at a 0.1 C rate, and retains a stable discharge capacity of 972 mA h g-1after 70 cycles and 845 mA h g-1after 120 cycles with a high Coulombic efficiency of over 99%. To our knowledge, this new methodology for lithium-sulfur cathodes has not been reported so far; the initial specific capacity is the highest value calculated based on total composite mass, which has not been disclosed in the literature. This journal is
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U2 - 10.1039/c4ta03570d
DO - 10.1039/c4ta03570d
M3 - RGC 21 - Publication in refereed journal
SN - 2050-7488
VL - 2
SP - 15938
EP - 15944
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 38
ER -
