Porous NiCo2O4 nanotubes as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries

Laiyang Li; Laifa Shen; Ping Nie; Gang Pang; Jie Wang; Hongsen Li; Shengyang Dong; Xiaogang Zhang

doi:10.1039/c5ta07856c

Porous NiCo₂O₄ nanotubes as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O₂ batteries

Laiyang Li, Laifa Shen, Ping Nie, Gang Pang, Jie Wang, Hongsen Li, Shengyang Dong, Xiaogang Zhang^*

^*Corresponding author for this work

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

56 Citations (Scopus)

Abstract

Porous NiCo₂O₄ nanotubes have been successfully synthesized using a facile and cost-effective electrospinning method and used as a noble-metal-free catalyst for rechargeable Li-O₂ batteries. The as-synthesized NiCo₂O₄ nanotubes possess hollow cavities and porous walls, and were found to significantly improve the electrochemical performance of Li-O₂ batteries, by endowing them with a high initial discharge capacity, reduced overpotential as well as good rate capability. Excellent cycling stability over 110 cycles with a highly discharged voltage platform of 2.4 V at 200 mA g_c^-1 was achieved. By means of FESEM, XRD, Raman spectroscopy and GITT analysis, toroidal-shaped Li₂O₂ particles were identified as the dominant discharge product and it was revealed that the Li₂O₂ can be completely decomposed during the charging process, indicating its superior reversibility as an effective bifunctional catalyst for Li-O₂ batteries. All the results indicated that the porous NiCo₂O₄ nanotubes expressed intriguing properties and great potential applications as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O₂ batteries.

Original language	English
Pages (from-to)	24309-24314
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	48
DOIs	https://doi.org/10.1039/c5ta07856c
Publication status	Published - 2015
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

UN SDGs

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

Access to Document

10.1039/c5ta07856c

Cite this

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title = "Porous NiCo2O4 nanotubes as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries",

abstract = "Porous NiCo2O4 nanotubes have been successfully synthesized using a facile and cost-effective electrospinning method and used as a noble-metal-free catalyst for rechargeable Li-O2 batteries. The as-synthesized NiCo2O4 nanotubes possess hollow cavities and porous walls, and were found to significantly improve the electrochemical performance of Li-O2 batteries, by endowing them with a high initial discharge capacity, reduced overpotential as well as good rate capability. Excellent cycling stability over 110 cycles with a highly discharged voltage platform of 2.4 V at 200 mA gc-1 was achieved. By means of FESEM, XRD, Raman spectroscopy and GITT analysis, toroidal-shaped Li2O2 particles were identified as the dominant discharge product and it was revealed that the Li2O2 can be completely decomposed during the charging process, indicating its superior reversibility as an effective bifunctional catalyst for Li-O2 batteries. All the results indicated that the porous NiCo2O4 nanotubes expressed intriguing properties and great potential applications as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries.",

author = "Laiyang Li and Laifa Shen and Ping Nie and Gang Pang and Jie Wang and Hongsen Li and Shengyang Dong and Xiaogang Zhang",

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AU - Li, Laiyang

AU - Shen, Laifa

AU - Nie, Ping

AU - Pang, Gang

AU - Wang, Jie

AU - Li, Hongsen

AU - Dong, Shengyang

AU - Zhang, Xiaogang

PY - 2015

Y1 - 2015

N2 - Porous NiCo2O4 nanotubes have been successfully synthesized using a facile and cost-effective electrospinning method and used as a noble-metal-free catalyst for rechargeable Li-O2 batteries. The as-synthesized NiCo2O4 nanotubes possess hollow cavities and porous walls, and were found to significantly improve the electrochemical performance of Li-O2 batteries, by endowing them with a high initial discharge capacity, reduced overpotential as well as good rate capability. Excellent cycling stability over 110 cycles with a highly discharged voltage platform of 2.4 V at 200 mA gc-1 was achieved. By means of FESEM, XRD, Raman spectroscopy and GITT analysis, toroidal-shaped Li2O2 particles were identified as the dominant discharge product and it was revealed that the Li2O2 can be completely decomposed during the charging process, indicating its superior reversibility as an effective bifunctional catalyst for Li-O2 batteries. All the results indicated that the porous NiCo2O4 nanotubes expressed intriguing properties and great potential applications as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries.

AB - Porous NiCo2O4 nanotubes have been successfully synthesized using a facile and cost-effective electrospinning method and used as a noble-metal-free catalyst for rechargeable Li-O2 batteries. The as-synthesized NiCo2O4 nanotubes possess hollow cavities and porous walls, and were found to significantly improve the electrochemical performance of Li-O2 batteries, by endowing them with a high initial discharge capacity, reduced overpotential as well as good rate capability. Excellent cycling stability over 110 cycles with a highly discharged voltage platform of 2.4 V at 200 mA gc-1 was achieved. By means of FESEM, XRD, Raman spectroscopy and GITT analysis, toroidal-shaped Li2O2 particles were identified as the dominant discharge product and it was revealed that the Li2O2 can be completely decomposed during the charging process, indicating its superior reversibility as an effective bifunctional catalyst for Li-O2 batteries. All the results indicated that the porous NiCo2O4 nanotubes expressed intriguing properties and great potential applications as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries.

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