Pyrolytic Carbon Nanosheets for Ultrafast and Ultrastable Sodium-Ion Storage

Se Youn Cho, Minjee Kang, Jaewon Choi, Min Eui Lee, Hyeon Ji Yoon, Hae Jin Kim, Cecilia Leal, Sungho Lee, Hyoung Joon Jin, Young Soo Yun

Research output: Contribution to journalArticlepeer-review


Na-ion cointercalation in the graphite host structure in a glyme-based electrolyte represents a new possibility for using carbon-based materials (CMs) as anodes for Na-ion storage. However, local microstructures and nanoscale morphological features in CMs affect their electrochemical performances; they require intensive studies to achieve high levels of Na-ion storage performances. Here, pyrolytic carbon nanosheets (PCNs) composed of multitudinous graphitic nanocrystals are prepared from renewable bioresources by heating. In particular, PCN-2800 prepared by heating at 2800 °C has a distinctive sp2 carbon bonding nature, crystalline domain size of ≈44.2 Å, and high electrical conductivity of ≈320 S cm−1, presenting significantly high rate capability at 600 C (60 A g−1) and stable cycling behaviors over 40 000 cycles as an anode for Na-ion storage. The results of this study show the unusual graphitization behaviors of a char-type carbon precursor and exceptionally high rate and cycling performances of the resulting graphitic material, PCN-2800, even surpassing those of supercapacitors.

Original languageEnglish (US)
Article number1703043
Issue number17
StatePublished - Apr 26 2018


  • anodes
  • carbon nanosheets
  • cointercalation
  • pyrolytic carbon
  • sodium ion batteries

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Chemistry(all)
  • Materials Science(all)
  • Biotechnology
  • Biomaterials


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