High Capacity Carbon Based Electrodes for Lithium/Oxygen Batteries

Mojtaba Mirzaeian, Peter J. Hall

Research output: Contribution to journalArticle

Abstract

Porous carbon aerogels are prepared by polycondensation of resorcinol (R) and formaldehyde (F) catalyzed by sodium carbonate (C) followed by carbonization of the resultant aerogels at 800℃ in an inert atmosphere. The porous texture of the carbons has been adjusted by the change of the molar ratio of resorcinol to catalyst (R/C) in the gel precursors in the range of 100 to 500. The porous structure of the aerogels and carbon aerogels are characterized by N2 adsorption-desorption measurements at 77 K. It is found that total pore volume and average pore diameter of the carbons increase with increase in the R/C ratio of the gel precursors. The prepared carbon aerogels are used as active materials in fabrication of composite carbon electrodes. The electrochemical performance of the electrodes has been tested by using them as cathodes in a Li/O2 cell. Through the galvanostatic charge/discharge measurements, it is found that with an increase of R/C ratio, the specific capacity of the Li/O2 cell fabricated from the carbon aerogels increases from 716 to 2077 mAhg1. The resulting voltage profiles for the first ten charge/discharge cycles indicate that the carbon samples possess excellent stability on cycling.
Original languageEnglish
Pages (from-to)90-96
Number of pages7
JournalPower System Technology
Volume31
Issue number20
Publication statusPublished - 2007
Externally publishedYes

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Aerogels
Lithium
Electrodes
Carbon
Oxygen
Catalysts
Gels
Carbonization
Polycondensation
Formaldehyde
Carbonates
Desorption
Cathodes
Textures
Sodium
Adsorption
Fabrication
Composite materials
Electric potential

Cite this

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abstract = "Porous carbon aerogels are prepared by polycondensation of resorcinol (R) and formaldehyde (F) catalyzed by sodium carbonate (C) followed by carbonization of the resultant aerogels at 800℃ in an inert atmosphere. The porous texture of the carbons has been adjusted by the change of the molar ratio of resorcinol to catalyst (R/C) in the gel precursors in the range of 100 to 500. The porous structure of the aerogels and carbon aerogels are characterized by N2 adsorption-desorption measurements at 77 K. It is found that total pore volume and average pore diameter of the carbons increase with increase in the R/C ratio of the gel precursors. The prepared carbon aerogels are used as active materials in fabrication of composite carbon electrodes. The electrochemical performance of the electrodes has been tested by using them as cathodes in a Li/O2 cell. Through the galvanostatic charge/discharge measurements, it is found that with an increase of R/C ratio, the specific capacity of the Li/O2 cell fabricated from the carbon aerogels increases from 716 to 2077 mAhg1. The resulting voltage profiles for the first ten charge/discharge cycles indicate that the carbon samples possess excellent stability on cycling.",
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High Capacity Carbon Based Electrodes for Lithium/Oxygen Batteries. / Mirzaeian, Mojtaba; Hall, Peter J.

In: Power System Technology, Vol. 31, No. 20, 2007, p. 90-96.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High Capacity Carbon Based Electrodes for Lithium/Oxygen Batteries

AU - Mirzaeian, Mojtaba

AU - Hall, Peter J.

PY - 2007

Y1 - 2007

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AB - Porous carbon aerogels are prepared by polycondensation of resorcinol (R) and formaldehyde (F) catalyzed by sodium carbonate (C) followed by carbonization of the resultant aerogels at 800℃ in an inert atmosphere. The porous texture of the carbons has been adjusted by the change of the molar ratio of resorcinol to catalyst (R/C) in the gel precursors in the range of 100 to 500. The porous structure of the aerogels and carbon aerogels are characterized by N2 adsorption-desorption measurements at 77 K. It is found that total pore volume and average pore diameter of the carbons increase with increase in the R/C ratio of the gel precursors. The prepared carbon aerogels are used as active materials in fabrication of composite carbon electrodes. The electrochemical performance of the electrodes has been tested by using them as cathodes in a Li/O2 cell. Through the galvanostatic charge/discharge measurements, it is found that with an increase of R/C ratio, the specific capacity of the Li/O2 cell fabricated from the carbon aerogels increases from 716 to 2077 mAhg1. The resulting voltage profiles for the first ten charge/discharge cycles indicate that the carbon samples possess excellent stability on cycling.

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EP - 96

JO - Power System Technology

JF - Power System Technology

SN - 1000-3673

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