Coffee grounds-derived carbon as high performance anode materials for energy storage applications

Shing Yu Tsai, Rasu Muruganantham, Shih Hsuan Tai, Bor Kae Chang, Shu Chi Wu, Yu Lun Chueh, Wei Ren Liu

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

In this study, we propose a facile process to synthesize nitrogen-doped carbon from agro-food used wastage of coffee grounds and fabricated as anode materials for Li/Na-ion batteries. The coffee grounds derived carbon (CGC) and nitrogen doped (N-CGC) porous carbon materials have been compared by experimental measurements as well as theoretical calculations. The nitrogen doping of 2.23–6.17% are successfully modified into the material. The experimental results indicate that N-CGC exhibits better reversible capacity and excellent rate capability than those of CGC anode due to different distribution functional groups of pyrrolic N and pyridinic N. We also use three different models to demonstrate the differences in carrier transport properties. The difference in electrochemical properties of CGC and N-CGC might be due to the appearance of extra states near the Dirac cone when examining the partial density of states (PDOS) of N-CGC by Density functional theory (DFT) calculations. This investigation is not only solving the problem of biomass waste disposal, also generates valuable functional carbon-based materials for energy storage applications.

Original languageEnglish
Pages (from-to)178-188
Number of pages11
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume97
DOIs
StatePublished - Apr 2019

Keywords

  • Anode
  • Biomass
  • Coffee grounds
  • Lithium-ion batteries
  • Sodium-ion batteries
  • Theoretical calculations

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