Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use

Joji Hasegawa, Kazuyoshi Kanamori, Naokatsu Kannari, Jun ichi Ozaki, Kazuki Nakanishi, Takeshi Abe

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Hard carbons have immense potential as anode materials for Na-ion batteries, because the expanded graphene interlayers and nanovoids between randomly stacked aromatic fragments can accommodate a substantial amount of sodium. However, the large irreversible capacity in the first cycle still remains as a significant issue in terms of a practicable battery technology. Here, we show that hard carbon electrodes derived from a common phenol resin deliver a high reversible capacity within the narrow potential range of 0.1-0.005V (vs. Na+/Na) and an excellent initial coulombic efficiency up to 95%. The former allows the sustainable high voltage, whereas the latter minimizes the amount of unavailable Na+ in a closed cell. The findings in this work put forward a guideline for manufacturing hard carbon electrodes, which goes against the current trend of nanostructuring and downsizing. It's got potential: Carbon electrodes derived from a phenol resin for Na-ion batteries show potential profiles just like those of Li-ion intercalation/extraction into/from graphite. The high reversible capacity and the excellent initial coulombic efficiency well above 90% have great potential for a practical use.

Original languageEnglish
Pages (from-to)1917-1920
Number of pages4
JournalChemElectroChem
Volume2
Issue number12
DOIs
Publication statusPublished - Dec 1 2015

Fingerprint

Anodes
Carbon
Ions
Graphite
Phenol
Electrodes
Phenols
Resins
Intercalation
Graphene
Sodium
Electric potential

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electrochemistry

Cite this

Hasegawa, J., Kanamori, K., Kannari, N., Ozaki, J. I., Nakanishi, K., & Abe, T. (2015). Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use. ChemElectroChem, 2(12), 1917-1920. https://doi.org/10.1002/celc.201500412

Hard Carbon Anodes for Na-Ion Batteries : Toward a Practical Use. / Hasegawa, Joji; Kanamori, Kazuyoshi; Kannari, Naokatsu; Ozaki, Jun ichi; Nakanishi, Kazuki; Abe, Takeshi.

In: ChemElectroChem, Vol. 2, No. 12, 01.12.2015, p. 1917-1920.

Research output: Contribution to journalArticle

Hasegawa, J, Kanamori, K, Kannari, N, Ozaki, JI, Nakanishi, K & Abe, T 2015, 'Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use', ChemElectroChem, vol. 2, no. 12, pp. 1917-1920. https://doi.org/10.1002/celc.201500412
Hasegawa J, Kanamori K, Kannari N, Ozaki JI, Nakanishi K, Abe T. Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use. ChemElectroChem. 2015 Dec 1;2(12):1917-1920. https://doi.org/10.1002/celc.201500412
Hasegawa, Joji ; Kanamori, Kazuyoshi ; Kannari, Naokatsu ; Ozaki, Jun ichi ; Nakanishi, Kazuki ; Abe, Takeshi. / Hard Carbon Anodes for Na-Ion Batteries : Toward a Practical Use. In: ChemElectroChem. 2015 ; Vol. 2, No. 12. pp. 1917-1920.
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