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Title of Journal: Nano Res

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Abbravation: Nano Research

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Tsinghua University Press

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DOI

10.1016/0005-2728(78)90176-7

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1998-0000

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Ordered SnO nanoparticles in MWCNT as a functional

Authors: AYoung Kim Min Kyu Kim Ji Young Kim Yuren Wen Lin Gu VanDuong Dao HoSuk Choi Dongjin Byun Joong Kee Lee
Publish Date: 2017/01/26
Volume: 10, Issue: 6, Pages: 2083-2095
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Abstract

Lithiumsulfur battery has become one of the most promising candidates for next generation batteries and it is still restricted due to the low sulfur conductivity large volume expansion and severe polysulfide shuttling Herein we present a novel hybrid electrode with a ternary nanomaterial based on sulfurimpregnated multiwalled carbon nanotubes filled with ordered tinmonoxide nanoparticles MWCNTSnO/S Using a dry plasma reduction method a mechanically robust material is prepared as a cathode host material for lithiumsulfur batteries The MWCNTSnO/S electrode exhibits high conductivity good ability to capture polysulfides and small volume change during a repeated charge–discharge process In situ transmission electron microscopy and ultraviolet–visible absorption results indicate that the MWCNTSnO host efficiently suppresses volume expansion during lithiation and reduces polysulfide dissolution into the electrolyte Furthermore the ordered SnO nanoparticles in the MWCNTs facilitate fast ion/electron transfer during the redox reactions by acting as connective links between the walls of the MWCNTs The MWCNTSnO/S cathode with a high sulfur content of 70 wt exhibits an initial discharge capacity of 16824 mAh·g–1 at 1675 mA·g–1 01 C rate and retains a capacity of 5301 mAh·g–1 at 05 C after 1000 cycles with nearly 100 Coulombic efficiency Furthermore the electrode exhibits the high capacity even at a high current rate of 20 CThis work was supported by KIST institutional program No 2E27061 This work was also supported by research grants of NRF funded by the National Research Foundation under the Ministry of Science ICT Future Republic of Korea No NRF2015H1D3A1036078

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