Three-dimensional network macro-porous cobalt oxide as catalyst for Li-O2 cells

Chuan Tao Song; Bo Wen Huang; Xiao Zhen Liao; Xiao Min Liu; Hui Yang; Zi Feng Ma

doi:10.1016/j.jpowsour.2015.04.181

Three-dimensional network macro-porous cobalt oxide as catalyst for Li-O₂ cells

Chuan Tao Song, Bo Wen Huang, Xiao Zhen Liao, Xiao Min Liu, Hui Yang, Zi Feng Ma

College of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Li-O₂ cell is considered as an ideal choice for the electric vehicles due to its high energy density, but is now suffering from the large charge polarization and low practical capacity. In this context, three-dimensional network macro-porous CoO synthesized via a sol-gel method is applied as an efficient catalyst in Li-O₂ cells to alleviate this situation. Compared to KB (Ketjen black EC600JD) based cells, the CoO/KB based cell exhibits much improved electrochemical performance at various current densities, including flatter discharge/charge plateau, lower polarization and higher specific capacity. In addition, the CoO/KB based cell maintains the discharge capacity up to 4500 mAh g^-1_CoO/KB after being cycled at 0.1 mA cm^-2 for 16 days under O₂ atmosphere. This excellent electrochemical performance is attributed to the high catalytic activity and abundant macro-pores of our home-made CoO. This strategy of designing CoO might be a feasible way to obtain the Li-O₂ cell with low polarization and high capacity.

Original language	English
Pages (from-to)	255-260
Number of pages	6
Journal	Journal of Power Sources
Volume	291
DOIs	https://doi.org/10.1016/j.jpowsour.2015.04.181
State	Published - 22 May 2015

Keywords

Catalyst
Cobalt oxide
Li-O cell
Three-dimensional porous network

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2015.04.181

Cite this

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title = "Three-dimensional network macro-porous cobalt oxide as catalyst for Li-O2 cells",

abstract = "Li-O2 cell is considered as an ideal choice for the electric vehicles due to its high energy density, but is now suffering from the large charge polarization and low practical capacity. In this context, three-dimensional network macro-porous CoO synthesized via a sol-gel method is applied as an efficient catalyst in Li-O2 cells to alleviate this situation. Compared to KB (Ketjen black EC600JD) based cells, the CoO/KB based cell exhibits much improved electrochemical performance at various current densities, including flatter discharge/charge plateau, lower polarization and higher specific capacity. In addition, the CoO/KB based cell maintains the discharge capacity up to 4500 mAh g-1CoO/KB after being cycled at 0.1 mA cm-2 for 16 days under O2 atmosphere. This excellent electrochemical performance is attributed to the high catalytic activity and abundant macro-pores of our home-made CoO. This strategy of designing CoO might be a feasible way to obtain the Li-O2 cell with low polarization and high capacity.",

keywords = "Catalyst, Cobalt oxide, Li-O cell, Three-dimensional porous network",

author = "Song, {Chuan Tao} and Huang, {Bo Wen} and Liao, {Xiao Zhen} and Liu, {Xiao Min} and Hui Yang and Ma, {Zi Feng}",

year = "2015",

month = may,

day = "22",

doi = "10.1016/j.jpowsour.2015.04.181",

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journal = "Journal of Power Sources",

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T1 - Three-dimensional network macro-porous cobalt oxide as catalyst for Li-O2 cells

AU - Song, Chuan Tao

AU - Huang, Bo Wen

AU - Liao, Xiao Zhen

AU - Liu, Xiao Min

AU - Yang, Hui

AU - Ma, Zi Feng

PY - 2015/5/22

Y1 - 2015/5/22

N2 - Li-O2 cell is considered as an ideal choice for the electric vehicles due to its high energy density, but is now suffering from the large charge polarization and low practical capacity. In this context, three-dimensional network macro-porous CoO synthesized via a sol-gel method is applied as an efficient catalyst in Li-O2 cells to alleviate this situation. Compared to KB (Ketjen black EC600JD) based cells, the CoO/KB based cell exhibits much improved electrochemical performance at various current densities, including flatter discharge/charge plateau, lower polarization and higher specific capacity. In addition, the CoO/KB based cell maintains the discharge capacity up to 4500 mAh g-1CoO/KB after being cycled at 0.1 mA cm-2 for 16 days under O2 atmosphere. This excellent electrochemical performance is attributed to the high catalytic activity and abundant macro-pores of our home-made CoO. This strategy of designing CoO might be a feasible way to obtain the Li-O2 cell with low polarization and high capacity.

AB - Li-O2 cell is considered as an ideal choice for the electric vehicles due to its high energy density, but is now suffering from the large charge polarization and low practical capacity. In this context, three-dimensional network macro-porous CoO synthesized via a sol-gel method is applied as an efficient catalyst in Li-O2 cells to alleviate this situation. Compared to KB (Ketjen black EC600JD) based cells, the CoO/KB based cell exhibits much improved electrochemical performance at various current densities, including flatter discharge/charge plateau, lower polarization and higher specific capacity. In addition, the CoO/KB based cell maintains the discharge capacity up to 4500 mAh g-1CoO/KB after being cycled at 0.1 mA cm-2 for 16 days under O2 atmosphere. This excellent electrochemical performance is attributed to the high catalytic activity and abundant macro-pores of our home-made CoO. This strategy of designing CoO might be a feasible way to obtain the Li-O2 cell with low polarization and high capacity.

KW - Catalyst

KW - Cobalt oxide

KW - Li-O cell

KW - Three-dimensional porous network

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