Unveiling the synergistic effect of polysulfide additive and MnO<sub>2</sub> hollow spheres in evolving a stable cyclic performance in Li–S batteries

Syed Abdul Ahad; P. Ragupathy; Soojy Ryu; Hyun-Wook Lee; Do Kyung Kim

doi:10.1039/c7cc04229a

Unveiling the synergistic effect of polysulfide additive and MnO<sub>2</sub> hollow spheres in evolving a stable cyclic performance in Li–S batteries

Syed Abdul Ahad
, P. Ragupathy
, Soojy Ryu
, Hyun-Wook Lee
, Do Kyung Kim

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Herein, we demonstrate a synergistic approach involving polar-based oxide and polysulfide additives for effectively suppressing polysulfide dissolution during cycling. The MnO₂ hollow spheres not only provide physical confinement for the polysulfide species but also enable strong chemical interactions between polysulfide species and oxides, while the added polysulfide furnishes a mass buffering effect and compensates for the capacity losses due to partial cathode dissolution during discharge. The capacity retentions of S/KB, S/KB/LiPS, S/KB/MnO₂, and S/KB/MnO₂/LiPS composite cathodes are 31%, 45%, 59%, and 91% respectively. The remarkable capacity retention of the S/KB/LiPS/MnO₂ composite electrode is mainly attributed to the synergistic effect between MnO₂ and polysulfide additives.

Original language	English
Pages (from-to)	8782-8785
Number of pages	4
Journal	Chemical Communications
Volume	53
Issue number	62
DOIs	https://doi.org/10.1039/c7cc04229a
Publication status	Published - 2017
Externally published	Yes

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@article{9814dd6256ce41cc9234d20c55b6f93a,

title = "Unveiling the synergistic effect of polysulfide additive and MnO2 hollow spheres in evolving a stable cyclic performance in Li–S batteries",

abstract = "Herein, we demonstrate a synergistic approach involving polar-based oxide and polysulfide additives for effectively suppressing polysulfide dissolution during cycling. The MnO2 hollow spheres not only provide physical confinement for the polysulfide species but also enable strong chemical interactions between polysulfide species and oxides, while the added polysulfide furnishes a mass buffering effect and compensates for the capacity losses due to partial cathode dissolution during discharge. The capacity retentions of S/KB, S/KB/LiPS, S/KB/MnO2, and S/KB/MnO2/LiPS composite cathodes are 31\%, 45\%, 59\%, and 91\% respectively. The remarkable capacity retention of the S/KB/LiPS/MnO2 composite electrode is mainly attributed to the synergistic effect between MnO2 and polysulfide additives.",

author = "Ahad, \{Syed Abdul\} and P. Ragupathy and Soojy Ryu and Hyun-Wook Lee and Kim, \{Do Kyung\}",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7cc04229a",

language = "English",

volume = "53",

pages = "8782--8785",

journal = "Chemical Communications",

issn = "1359-7345",

number = "62",

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TY - JOUR

T1 - Unveiling the synergistic effect of polysulfide additive and MnO2 hollow spheres in evolving a stable cyclic performance in Li–S batteries

AU - Ahad, Syed Abdul

AU - Ragupathy, P.

AU - Ryu, Soojy

AU - Lee, Hyun-Wook

AU - Kim, Do Kyung

PY - 2017

Y1 - 2017

N2 - Herein, we demonstrate a synergistic approach involving polar-based oxide and polysulfide additives for effectively suppressing polysulfide dissolution during cycling. The MnO2 hollow spheres not only provide physical confinement for the polysulfide species but also enable strong chemical interactions between polysulfide species and oxides, while the added polysulfide furnishes a mass buffering effect and compensates for the capacity losses due to partial cathode dissolution during discharge. The capacity retentions of S/KB, S/KB/LiPS, S/KB/MnO2, and S/KB/MnO2/LiPS composite cathodes are 31%, 45%, 59%, and 91% respectively. The remarkable capacity retention of the S/KB/LiPS/MnO2 composite electrode is mainly attributed to the synergistic effect between MnO2 and polysulfide additives.

AB - Herein, we demonstrate a synergistic approach involving polar-based oxide and polysulfide additives for effectively suppressing polysulfide dissolution during cycling. The MnO2 hollow spheres not only provide physical confinement for the polysulfide species but also enable strong chemical interactions between polysulfide species and oxides, while the added polysulfide furnishes a mass buffering effect and compensates for the capacity losses due to partial cathode dissolution during discharge. The capacity retentions of S/KB, S/KB/LiPS, S/KB/MnO2, and S/KB/MnO2/LiPS composite cathodes are 31%, 45%, 59%, and 91% respectively. The remarkable capacity retention of the S/KB/LiPS/MnO2 composite electrode is mainly attributed to the synergistic effect between MnO2 and polysulfide additives.

UR - http://dx.doi.org/10.1039/c7cc04229a

U2 - 10.1039/c7cc04229a

DO - 10.1039/c7cc04229a

M3 - Article

SN - 1359-7345

VL - 53

SP - 8782

EP - 8785

JO - Chemical Communications

JF - Chemical Communications

IS - 62

ER -

Unveiling the synergistic effect of polysulfide additive and MnO<sub>2</sub> hollow spheres in evolving a stable cyclic performance in Li–S batteries

Abstract

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