Superior lithium storage in nitrogen-doped carbon nanofibers with open-channels

Sung Woo Park, Jae Chan Kim, Mushtaq Ahmad Dar, Hyun Woo Shim, Dong-Wan Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Increasing porosity and nitrogen doping are the most effective strategies for enhancing lithium storage in carbon-based anodes for lithium-ion batteries (LIBs). In this study, we prepare nitrogen-doped carbon nanofibers with open channels (N-CNFO) using a simple electrospinning method with subsequent two-step carbonization using polyacrylonitrile, waste poly(vinyl butyral) (W-PVB), and urea. The W-PVB induce open channels including pores of various sizes, and the urea increase the nitrogen content of the carbon fibers. N-CNFO exhibit excellent electrochemical properties as an anode material for LIBs, including high reversible capacity (734 mA h g−1 at 0.2 C), superior rate capability (388 and 358 mA h g−1 at 3 C and 5 C, respectively), and excellent cycling performance (330 mA h g−1 at 1 C after 500 cycles). These properties are imparted to the material owing to the high electrical conductivity of the web structure, the increased number of active sites derived from the open channel structure, and the high nitrogen content, specifically that of N-5 species. This facile synthesis using a waste resource may offer a new direction for the design of superior carbon-based anode materials for high-energy LIBs.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalChemical Engineering Journal
Volume315
DOIs
Publication statusPublished - 2017 May 1

Keywords

  • Lithium-ion batteries
  • N-doped carbon nanofibers
  • Open channels
  • Recycling
  • Waste poly(vinyl butyral)

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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