Commercial carbon molecular sieves as a high performance anode for sodium-ion batteries

Si Wei Zhang, Wei Lv, Chong Luo, Cong Hui You, Jun Zhang, Zheng Ze Pan, Fei Yu Kang, Quan Hong Yang

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)

Abstract

A commercial carbon molecular sieve (CMS) demonstrates excellent Na ion storage performance and is the best among current commercially available materials and much better than most hard carbons reported with complex microstructures. With a very low specific surface area measured by N2 adsorption, the CMS shows a high reversible capacity of 297 mA h/g at a relatively high current density of 100 mA/g, and, more promising, a very high initial Coulombic efficiency of up to 73.2%, which is the highest among unmodified commercial carbons. Such good performance is mainly the result of its abundant ultra-small (0.3-0.5 nm) pores that only allow the insertion of Na ions while rejecting the electrolyte, thus preventing its contact with the carbon surface, which is a basic principle for the design of a high performance anode material for a sodium-ion battery (SIB). The CMS also exhibits high rate and cyclic performance. Such performance basically meets the demand for commercial anode materials for a SIB, and hopefully, this finding will promote the commercialization of SIBs for practical use as graphite does for lithium-ion batteries.

Original languageEnglish
Pages (from-to)18-23
Number of pages6
JournalEnergy Storage Materials
Volume3
DOIs
Publication statusPublished - 2016 Apr 1
Externally publishedYes

Keywords

  • Anode
  • Carbon molecular sieve
  • Sodium ion battery
  • Ultra-small pore

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Energy Engineering and Power Technology

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