N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects
Cycle stability and rate performance are the key factors for the commercial applications of Li-sulfur batteries. Herein, N-doped carbon sheets with cobalt compounds nanoparticles anchored on carbon cloth (CoP/NC or Co9S8/NC) are synthesized to act as sulfur host in Li-S batteries. The porous 2D N-do...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/159522 |
| _version_ | 1811687327026642944 |
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| author | Xiao, Kuikui Chen, Zhen Liu, Zheng Zhang, Lili Cai, Xiaoyi Song, Changsheng Fan, Zefu Chen, Xiaohua Liu, Jile. Shen, Zexiang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Xiao, Kuikui Chen, Zhen Liu, Zheng Zhang, Lili Cai, Xiaoyi Song, Changsheng Fan, Zefu Chen, Xiaohua Liu, Jile. Shen, Zexiang |
| author_sort | Xiao, Kuikui |
| collection | NTU |
| description | Cycle stability and rate performance are the key factors for the commercial applications of Li-sulfur batteries. Herein, N-doped carbon sheets with cobalt compounds nanoparticles anchored on carbon cloth (CoP/NC or Co9S8/NC) are synthesized to act as sulfur host in Li-S batteries. The porous 2D N-doped carbon sheets uniformly grow on the surface of carbon cloth to form open porous structure, providing a mechanically robust space for the deposition of sulfur species and offering direct channels for fast Li+ diffusion. The cobalt compounds, serving as adsorbent to alleviate the shuttle effect of polysulfides by providing strong affinity and to accelerate the redox kinetics via their electrocatalytic effect toward the polysulfides conversion, are firmly and evenly embedded in the carbon sheets. Through comparison, the higher electrocatalytic effect of CoP/NC than Co9S8/NC are proved by the cyclic voltammetry (CV) of the symmetric cell with Li2S6 electrolyte as both negative and positive electrodes. Benefiting from the unique open structure, proper adsorption ability and superior catalytic effect of CoP/NC, it shows enhanced electrochemical performance, delivering high specific of 1482 mAh g−1 at 0.1C and 678 mAh g−1 at 3C and outstanding cycling performance with capacity decay of only 0.0327% per cycle for over 560 cycles. |
| first_indexed | 2024-10-01T05:14:33Z |
| format | Journal Article |
| id | ntu-10356/159522 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:14:33Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1595222022-06-28T00:09:08Z N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects Xiao, Kuikui Chen, Zhen Liu, Zheng Zhang, Lili Cai, Xiaoyi Song, Changsheng Fan, Zefu Chen, Xiaohua Liu, Jile. Shen, Zexiang School of Physical and Mathematical Sciences Science::Physics Electrocatalytic Adsorption Cycle stability and rate performance are the key factors for the commercial applications of Li-sulfur batteries. Herein, N-doped carbon sheets with cobalt compounds nanoparticles anchored on carbon cloth (CoP/NC or Co9S8/NC) are synthesized to act as sulfur host in Li-S batteries. The porous 2D N-doped carbon sheets uniformly grow on the surface of carbon cloth to form open porous structure, providing a mechanically robust space for the deposition of sulfur species and offering direct channels for fast Li+ diffusion. The cobalt compounds, serving as adsorbent to alleviate the shuttle effect of polysulfides by providing strong affinity and to accelerate the redox kinetics via their electrocatalytic effect toward the polysulfides conversion, are firmly and evenly embedded in the carbon sheets. Through comparison, the higher electrocatalytic effect of CoP/NC than Co9S8/NC are proved by the cyclic voltammetry (CV) of the symmetric cell with Li2S6 electrolyte as both negative and positive electrodes. Benefiting from the unique open structure, proper adsorption ability and superior catalytic effect of CoP/NC, it shows enhanced electrochemical performance, delivering high specific of 1482 mAh g−1 at 0.1C and 678 mAh g−1 at 3C and outstanding cycling performance with capacity decay of only 0.0327% per cycle for over 560 cycles. Ministry of Education (MOE) X. H. Chen acknowledges the financial support from the National Natural Science Foundation of China (51572078, 51772086 and 51872087) and the Scientific Research Fund of Hunan Province (2015JJ2033). J. L. Liu thanks the financial support from Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51802091), National Thousand Young Talents Program and the Fundamental Research Funds for the Central Universities (Grant No. 531109200024). Z. X. Shen acknowledges the financial support from Ministry of Education, Singapore, AcRF Tier 1 (Reference no: RG103/16), and AcRF Tier 3 (MOE2011-T3-1-005). 2022-06-28T00:09:07Z 2022-06-28T00:09:07Z 2020 Journal Article Xiao, K., Chen, Z., Liu, Z., Zhang, L., Cai, X., Song, C., Fan, Z., Chen, X., Liu, J. & Shen, Z. (2020). N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects. Journal of Power Sources, 455, 227959-. https://dx.doi.org/10.1016/j.jpowsour.2020.227959 0378-7753 https://hdl.handle.net/10356/159522 10.1016/j.jpowsour.2020.227959 2-s2.0-85080151275 455 227959 en RG103/16 MOE2011-T3-1-005 Journal of Power Sources © 2020 Elsevier B.V. All rights reserved. |
| spellingShingle | Science::Physics Electrocatalytic Adsorption Xiao, Kuikui Chen, Zhen Liu, Zheng Zhang, Lili Cai, Xiaoyi Song, Changsheng Fan, Zefu Chen, Xiaohua Liu, Jile. Shen, Zexiang N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title | N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title_full | N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title_fullStr | N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title_full_unstemmed | N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title_short | N-doped carbon sheets arrays embedded with CoP nanoparticles as high-performance cathode for Li-S batteries via triple synergistic effects |
| title_sort | n doped carbon sheets arrays embedded with cop nanoparticles as high performance cathode for li s batteries via triple synergistic effects |
| topic | Science::Physics Electrocatalytic Adsorption |
| url | https://hdl.handle.net/10356/159522 |
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