Atomic layer deposition-enabled ultrastable freestanding carbon-selenium cathodes with high mass loading for sodium-selenium battery

Dingtao Ma, Yongliang Li, Jingbo Yang, Hongwei Mi, Shan Luo, Libo Deng, Chaoyi Yan, Peixin Zhang, Zhiqun Lin, Xiangzhong Ren, Jianqing Li, Han Zhang

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Melt diffusion followed by vapor deposition is judiciously combined with atomic layer deposition (ALD) to construct Al2O3–coated (Se/porous N-doped carbon nanofibers)@Se composite (denoted SC@Se-Al2O3) materials for sodium-selenium (Na-Se) batteries. High mass loading, ultrastable and free-standing carbon-selenium cathode is conveniently achieved by tailoring both the Se content and the thickness of deposited Al2O3 layer. Importantly, in contrast to only 176 mAh g−1 of the electrode without Al2O3 deposition after 660 cycles, the composite with a Se content of 67 wt% and a 3-nm Al2O3 thickness retains a reversible capacity of 503 mAh g−1 after 1000 cycles with no capacity fading at 0.5 A g−1. These findings clearly suggest that ALD strategy provides a viable, controllable and effective means of tuning the electrode performance towards high mass loading of active materials and long cycle life of the resulting battery for energy storage applications.

Original languageEnglish
Pages (from-to)317-325
Number of pages9
JournalNano Energy
Volume43
DOIs
StatePublished - Jan 2018

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Nos. 51774203, 51374146, 51502177 ), the Natural Science Foundation of Guangdong (No. 2014A030310323 ), the Foundation of Guangdong Educational Committee (No. 2016KTSCX124 ), Shenzhen Science and Technology Project Program (Nos. ZDSYS201606061530079, KQJSCX20170327151152722, JCYJ20160422112012739 ), the National Natural Science Foundation of SZU ( 827-000039 ).

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Atomic layer deposition
  • Carbon-selenium cathode
  • Energy storage
  • High mass loading
  • Sodium ion batteries

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