Sodium ion diffusion in layered NaxCoO2

Takayuki Shibata, Wataru Kobayashi, Yutaka Moritomo

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The temperature dependence of sodium ion diffusion coefficient (D) of NaxCoO2 is extensively investigated in the temperature range of 303 ≤ T ≤ 349 K using electrochemical impedance spectroscopy. The magnitude of D is found to be (0:7-1:9) × 10-11 cm 2/s (0:54 ≤ x ≤ 0:85) at 303 K, which is comparable to that of LiCoO2. The activation energy (ED a ) of D gradually increases from 0.32 at x = 0:54 to 0.51 eV at x = 0:85. The activation energy (ER a ) of charge-transfer resistance (R ct) also increases from 0.34 at x = 0:54 to 0.59 eV at x = 0:85. These behaviors are ascribed to an increase in potential barrier due to the decrease in interlayer distance (d).

Original languageEnglish
Article number097101
JournalApplied Physics Express
Volume6
Issue number9
DOIs
Publication statusPublished - 2013 Sep
Externally publishedYes

Fingerprint

Activation energy
Sodium
sodium
activation energy
Ions
Electrochemical impedance spectroscopy
Charge transfer
interlayers
ions
diffusion coefficient
charge transfer
impedance
Temperature
temperature dependence
spectroscopy
temperature

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Shibata, T., Kobayashi, W., & Moritomo, Y. (2013). Sodium ion diffusion in layered NaxCoO2 . Applied Physics Express, 6(9), [097101]. https://doi.org/10.7567/APEX.6.097101

Sodium ion diffusion in layered NaxCoO2 . / Shibata, Takayuki; Kobayashi, Wataru; Moritomo, Yutaka.

In: Applied Physics Express, Vol. 6, No. 9, 097101, 09.2013.

Research output: Contribution to journalArticle

Shibata, T, Kobayashi, W & Moritomo, Y 2013, 'Sodium ion diffusion in layered NaxCoO2 ', Applied Physics Express, vol. 6, no. 9, 097101. https://doi.org/10.7567/APEX.6.097101
Shibata, Takayuki ; Kobayashi, Wataru ; Moritomo, Yutaka. / Sodium ion diffusion in layered NaxCoO2 . In: Applied Physics Express. 2013 ; Vol. 6, No. 9.
@article{02c912e4e0ee490d86dd489e6afd588a,
title = "Sodium ion diffusion in layered NaxCoO2",
abstract = "The temperature dependence of sodium ion diffusion coefficient (D) of NaxCoO2 is extensively investigated in the temperature range of 303 ≤ T ≤ 349 K using electrochemical impedance spectroscopy. The magnitude of D is found to be (0:7-1:9) × 10-11 cm 2/s (0:54 ≤ x ≤ 0:85) at 303 K, which is comparable to that of LiCoO2. The activation energy (ED a ) of D gradually increases from 0.32 at x = 0:54 to 0.51 eV at x = 0:85. The activation energy (ER a ) of charge-transfer resistance (R ct) also increases from 0.34 at x = 0:54 to 0.59 eV at x = 0:85. These behaviors are ascribed to an increase in potential barrier due to the decrease in interlayer distance (d).",
author = "Takayuki Shibata and Wataru Kobayashi and Yutaka Moritomo",
year = "2013",
month = "9",
doi = "10.7567/APEX.6.097101",
language = "English",
volume = "6",
journal = "Applied Physics Express",
issn = "1882-0778",
publisher = "Japan Society of Applied Physics",
number = "9",

}

TY - JOUR

T1 - Sodium ion diffusion in layered NaxCoO2

AU - Shibata, Takayuki

AU - Kobayashi, Wataru

AU - Moritomo, Yutaka

PY - 2013/9

Y1 - 2013/9

N2 - The temperature dependence of sodium ion diffusion coefficient (D) of NaxCoO2 is extensively investigated in the temperature range of 303 ≤ T ≤ 349 K using electrochemical impedance spectroscopy. The magnitude of D is found to be (0:7-1:9) × 10-11 cm 2/s (0:54 ≤ x ≤ 0:85) at 303 K, which is comparable to that of LiCoO2. The activation energy (ED a ) of D gradually increases from 0.32 at x = 0:54 to 0.51 eV at x = 0:85. The activation energy (ER a ) of charge-transfer resistance (R ct) also increases from 0.34 at x = 0:54 to 0.59 eV at x = 0:85. These behaviors are ascribed to an increase in potential barrier due to the decrease in interlayer distance (d).

AB - The temperature dependence of sodium ion diffusion coefficient (D) of NaxCoO2 is extensively investigated in the temperature range of 303 ≤ T ≤ 349 K using electrochemical impedance spectroscopy. The magnitude of D is found to be (0:7-1:9) × 10-11 cm 2/s (0:54 ≤ x ≤ 0:85) at 303 K, which is comparable to that of LiCoO2. The activation energy (ED a ) of D gradually increases from 0.32 at x = 0:54 to 0.51 eV at x = 0:85. The activation energy (ER a ) of charge-transfer resistance (R ct) also increases from 0.34 at x = 0:54 to 0.59 eV at x = 0:85. These behaviors are ascribed to an increase in potential barrier due to the decrease in interlayer distance (d).

UR - http://www.scopus.com/inward/record.url?scp=84883684220&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883684220&partnerID=8YFLogxK

U2 - 10.7567/APEX.6.097101

DO - 10.7567/APEX.6.097101

M3 - Article

AN - SCOPUS:84883684220

VL - 6

JO - Applied Physics Express

JF - Applied Physics Express

SN - 1882-0778

IS - 9

M1 - 097101

ER -