Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell
The commercial application of lithium-sulfur batteries is severely hampered by polysulfide shuttle effects, sluggish redox kinetics, and uncontrollable lithium dendrite growth. Herein, a unique Ni-doped CoSe2 nanoparticle decorated bilayer carbon (Ni-CoSe2/BC) structure is synthesized for both the s...
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sg-ntu-dr.10356-1713762023-10-23T06:30:27Z Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell Xie, Yonghui Zheng, Wenrui Ao, Juan Shao, Yeqing Huang, Xing Li, Hong Cheng, Shuying Wang, Xinghui School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Metal-Organic Frameworks Carbon Nanostructure The commercial application of lithium-sulfur batteries is severely hampered by polysulfide shuttle effects, sluggish redox kinetics, and uncontrollable lithium dendrite growth. Herein, a unique Ni-doped CoSe2 nanoparticle decorated bilayer carbon (Ni-CoSe2/BC) structure is synthesized for both the sulfur cathode and lithium anode, which introduces bi-functionalities including Ⅰ) the internal carbon conductive network skeleton of carbon nanotubes is capable of physically confining, storing, and alleviating volume expansion of sulfur; and Ⅱ) Ni-CoSe2 nanoparticles decorated on the external carbon nanoarrays contribute to efficient chemical anchoring and accelerated polysulfide conversion for the cathode, and serve as lithiophilic sites to induce homogeneous lithium deposition for the anode. As a result, Ni-CoSe2/BC effectively inhibits the shuttle effect and induces dendrite-free lithium deposition. The Ni-CoSe2/BC-S delivers a high discharge specific capacity of 806 mAh g−1 after 400 cycles at 1 C, with a low capacity decay rate of 0.07% per cycle. Moreover, the Ni-CoSe2/BC-Li exhibits an impressively long cycle life of 2000 h at 10 mA cm−2/10 mAh cm−2. Notably, the lithium-sulfur full cell assembled with Ni-CoSe2/BC as universal hosts for both anode and cathode possesses an average discharge capacity of 6.07 mAh cm−2 in 50 cycles (Sulfur loading=12.8 mg cm−2, Electrolyte/Sulfur=7.8 μL mg−1, and Negative/Positive=1.56). This work provides novel structural design and mechanism insights for the practical application of lithium-sulfur batteries. 2023-10-23T06:30:27Z 2023-10-23T06:30:27Z 2023 Journal Article Xie, Y., Zheng, W., Ao, J., Shao, Y., Huang, X., Li, H., Cheng, S. & Wang, X. (2023). Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell. Energy Storage Materials, 62, 102925-. https://dx.doi.org/10.1016/j.ensm.2023.102925 2405-8297 https://hdl.handle.net/10356/171376 10.1016/j.ensm.2023.102925 2-s2.0-85167826717 62 102925 en Energy Storage Materials © 2023 Elsevier B.V. All rights reserved. |
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Engineering::Mechanical engineering Metal-Organic Frameworks Carbon Nanostructure Xie, Yonghui Zheng, Wenrui Ao, Juan Shao, Yeqing Huang, Xing Li, Hong Cheng, Shuying Wang, Xinghui Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
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The commercial application of lithium-sulfur batteries is severely hampered by polysulfide shuttle effects, sluggish redox kinetics, and uncontrollable lithium dendrite growth. Herein, a unique Ni-doped CoSe2 nanoparticle decorated bilayer carbon (Ni-CoSe2/BC) structure is synthesized for both the sulfur cathode and lithium anode, which introduces bi-functionalities including Ⅰ) the internal carbon conductive network skeleton of carbon nanotubes is capable of physically confining, storing, and alleviating volume expansion of sulfur; and Ⅱ) Ni-CoSe2 nanoparticles decorated on the external carbon nanoarrays contribute to efficient chemical anchoring and accelerated polysulfide conversion for the cathode, and serve as lithiophilic sites to induce homogeneous lithium deposition for the anode. As a result, Ni-CoSe2/BC effectively inhibits the shuttle effect and induces dendrite-free lithium deposition. The Ni-CoSe2/BC-S delivers a high discharge specific capacity of 806 mAh g−1 after 400 cycles at 1 C, with a low capacity decay rate of 0.07% per cycle. Moreover, the Ni-CoSe2/BC-Li exhibits an impressively long cycle life of 2000 h at 10 mA cm−2/10 mAh cm−2. Notably, the lithium-sulfur full cell assembled with Ni-CoSe2/BC as universal hosts for both anode and cathode possesses an average discharge capacity of 6.07 mAh cm−2 in 50 cycles (Sulfur loading=12.8 mg cm−2, Electrolyte/Sulfur=7.8 μL mg−1, and Negative/Positive=1.56). This work provides novel structural design and mechanism insights for the practical application of lithium-sulfur batteries. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Xie, Yonghui Zheng, Wenrui Ao, Juan Shao, Yeqing Huang, Xing Li, Hong Cheng, Shuying Wang, Xinghui |
format |
Article |
author |
Xie, Yonghui Zheng, Wenrui Ao, Juan Shao, Yeqing Huang, Xing Li, Hong Cheng, Shuying Wang, Xinghui |
author_sort |
Xie, Yonghui |
title |
Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
title_short |
Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
title_full |
Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
title_fullStr |
Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
title_full_unstemmed |
Multifunctional Ni-doped CoSe₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance Li-S full cell |
title_sort |
multifunctional ni-doped cose₂ nanoparticles decorated bilayer carbon structures for polysulfide conversion and dendrite-free lithium toward high-performance li-s full cell |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/171376 |
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1781793789694705664 |