Optimization of air electrode for Li/air batteries

Jie Xiao, Donghai Wang, Wu Xu, Deyu Wang, Ralph E. Williford, Jun Liu, Ji Guang Zhang

Research output: Contribution to journalArticle

276 Citations (Scopus)

Abstract

The effects of carbon microstructure and loading on the performance of Li/air batteries were investigated. We found that the capacities of Li/air batteries were related to both the specific capacity per unit weight of the carbon source (mAh g-1) and the carbon locating per unit area (g cm-2). Therefore, the product of these two parameters [i.e., the area-specific capacity (mAh cm-2)] was introduced to optimize the performance of the air electrode. At the fixed electrolyte amount (100 μL/cell), the best area-specific capacity of 13.1 mAh cm-2 was obtained at a carbon loading of 15.1 mg cm-2. Further increase or decrease in the carbon loading led to a reduced area-specific capacity. The capacities of air electrodes increased with increasing mesopore volumes of the carbon sources. The uniformity of the pore sizes also played an important role in determining the electrochemical performances of the Li/air batteries. At fixed carbon loading and discharge rates, the capacity increased significantly with increasing electrolyte amounts. This phenomenon was explained by the formation of extra triphase regions in the air electrodes. After optimizing the electrode and electrolyte parameters, a high capacity of 1756 mAh g-1 carbon was obtained for Li/air batteries operated in ambient oxygen pressure (0.21 atm).

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume157
Issue number4
DOIs
StatePublished - Mar 26 2010

Fingerprint

Carbon
Electrodes
Air
Electrolytes
Discharge (fluid mechanics)
Pore size
Oxygen
Microstructure

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Xiao, J., Wang, D., Xu, W., Wang, D., Williford, R. E., Liu, J., & Zhang, J. G. (2010). Optimization of air electrode for Li/air batteries. Journal of the Electrochemical Society, 157(4). https://doi.org/10.1149/1.3314375
Xiao, Jie ; Wang, Donghai ; Xu, Wu ; Wang, Deyu ; Williford, Ralph E. ; Liu, Jun ; Zhang, Ji Guang. / Optimization of air electrode for Li/air batteries. In: Journal of the Electrochemical Society. 2010 ; Vol. 157, No. 4.
@article{a875ba74338a40f6b84e17dd03b3cba6,
title = "Optimization of air electrode for Li/air batteries",
abstract = "The effects of carbon microstructure and loading on the performance of Li/air batteries were investigated. We found that the capacities of Li/air batteries were related to both the specific capacity per unit weight of the carbon source (mAh g-1) and the carbon locating per unit area (g cm-2). Therefore, the product of these two parameters [i.e., the area-specific capacity (mAh cm-2)] was introduced to optimize the performance of the air electrode. At the fixed electrolyte amount (100 μL/cell), the best area-specific capacity of 13.1 mAh cm-2 was obtained at a carbon loading of 15.1 mg cm-2. Further increase or decrease in the carbon loading led to a reduced area-specific capacity. The capacities of air electrodes increased with increasing mesopore volumes of the carbon sources. The uniformity of the pore sizes also played an important role in determining the electrochemical performances of the Li/air batteries. At fixed carbon loading and discharge rates, the capacity increased significantly with increasing electrolyte amounts. This phenomenon was explained by the formation of extra triphase regions in the air electrodes. After optimizing the electrode and electrolyte parameters, a high capacity of 1756 mAh g-1 carbon was obtained for Li/air batteries operated in ambient oxygen pressure (0.21 atm).",
author = "Jie Xiao and Donghai Wang and Wu Xu and Deyu Wang and Williford, {Ralph E.} and Jun Liu and Zhang, {Ji Guang}",
year = "2010",
month = "3",
day = "26",
doi = "10.1149/1.3314375",
language = "English (US)",
volume = "157",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "4",

}

Xiao, J, Wang, D, Xu, W, Wang, D, Williford, RE, Liu, J & Zhang, JG 2010, 'Optimization of air electrode for Li/air batteries', Journal of the Electrochemical Society, vol. 157, no. 4. https://doi.org/10.1149/1.3314375

Optimization of air electrode for Li/air batteries. / Xiao, Jie; Wang, Donghai; Xu, Wu; Wang, Deyu; Williford, Ralph E.; Liu, Jun; Zhang, Ji Guang.

In: Journal of the Electrochemical Society, Vol. 157, No. 4, 26.03.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Optimization of air electrode for Li/air batteries

AU - Xiao, Jie

AU - Wang, Donghai

AU - Xu, Wu

AU - Wang, Deyu

AU - Williford, Ralph E.

AU - Liu, Jun

AU - Zhang, Ji Guang

PY - 2010/3/26

Y1 - 2010/3/26

N2 - The effects of carbon microstructure and loading on the performance of Li/air batteries were investigated. We found that the capacities of Li/air batteries were related to both the specific capacity per unit weight of the carbon source (mAh g-1) and the carbon locating per unit area (g cm-2). Therefore, the product of these two parameters [i.e., the area-specific capacity (mAh cm-2)] was introduced to optimize the performance of the air electrode. At the fixed electrolyte amount (100 μL/cell), the best area-specific capacity of 13.1 mAh cm-2 was obtained at a carbon loading of 15.1 mg cm-2. Further increase or decrease in the carbon loading led to a reduced area-specific capacity. The capacities of air electrodes increased with increasing mesopore volumes of the carbon sources. The uniformity of the pore sizes also played an important role in determining the electrochemical performances of the Li/air batteries. At fixed carbon loading and discharge rates, the capacity increased significantly with increasing electrolyte amounts. This phenomenon was explained by the formation of extra triphase regions in the air electrodes. After optimizing the electrode and electrolyte parameters, a high capacity of 1756 mAh g-1 carbon was obtained for Li/air batteries operated in ambient oxygen pressure (0.21 atm).

AB - The effects of carbon microstructure and loading on the performance of Li/air batteries were investigated. We found that the capacities of Li/air batteries were related to both the specific capacity per unit weight of the carbon source (mAh g-1) and the carbon locating per unit area (g cm-2). Therefore, the product of these two parameters [i.e., the area-specific capacity (mAh cm-2)] was introduced to optimize the performance of the air electrode. At the fixed electrolyte amount (100 μL/cell), the best area-specific capacity of 13.1 mAh cm-2 was obtained at a carbon loading of 15.1 mg cm-2. Further increase or decrease in the carbon loading led to a reduced area-specific capacity. The capacities of air electrodes increased with increasing mesopore volumes of the carbon sources. The uniformity of the pore sizes also played an important role in determining the electrochemical performances of the Li/air batteries. At fixed carbon loading and discharge rates, the capacity increased significantly with increasing electrolyte amounts. This phenomenon was explained by the formation of extra triphase regions in the air electrodes. After optimizing the electrode and electrolyte parameters, a high capacity of 1756 mAh g-1 carbon was obtained for Li/air batteries operated in ambient oxygen pressure (0.21 atm).

UR - http://www.scopus.com/inward/record.url?scp=77949742218&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77949742218&partnerID=8YFLogxK

U2 - 10.1149/1.3314375

DO - 10.1149/1.3314375

M3 - Article

VL - 157

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 4

ER -