Spinel MnCo2O4 nanospheres as an effective cathode electrocatalyst for rechargeable lithium-oxygen batteries

Lu Zou; Junfang Cheng; Yuexing Jiang; Yingpeng Gong; Bo Chi; Jian Pu; Li Jian

doi:10.1039/c5ra27615b

Spinel MnCo₂O₄ nanospheres as an effective cathode electrocatalyst for rechargeable lithium-oxygen batteries

Lu Zou, Junfang Cheng, Yuexing Jiang, Yingpeng Gong^*, Bo Chi, Jian Pu, Li Jian

^*Corresponding author for this work

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

37 Citations (Scopus)

Abstract

The air cathode is vital for lithium-oxygen batteries (LOBs) to achieve high performance, which will facilitate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during the discharge and charge processes. In this paper, MnCo₂O₄ nanospheres prepared through the hydroxide co-precipitation method are investigated as an effective electrocatalyst for the ORR and OER in non-aqueous LOBs. The results show that a non-aqueous LOB with the electrocatalyst exhibits an excellent discharge capacity of 8518 mA h g_cathode^-1 with a narrow voltage gap of 0.85 V between the discharge and charge plateaus at a current density 100 mA g_cathode^-1, and can deliver cycling stability over 20 cycles. This study shows that MnCo₂O₄ nanospheres can be a promising cathode electrocatalyst in rechargeable lithium-oxygen batteries due to its enhanced catalytic activity towards the ORR and OER.

Original language	English
Pages (from-to)	31248-31255
Number of pages	8
Journal	RSC Advances
Volume	6
Issue number	37
DOIs	https://doi.org/10.1039/c5ra27615b
Publication status	Published - 2016
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Spinel MnCo2O4 nanospheres as an effective cathode electrocatalyst for rechargeable lithium-oxygen batteries",

abstract = "The air cathode is vital for lithium-oxygen batteries (LOBs) to achieve high performance, which will facilitate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during the discharge and charge processes. In this paper, MnCo2O4 nanospheres prepared through the hydroxide co-precipitation method are investigated as an effective electrocatalyst for the ORR and OER in non-aqueous LOBs. The results show that a non-aqueous LOB with the electrocatalyst exhibits an excellent discharge capacity of 8518 mA h gcathode-1 with a narrow voltage gap of 0.85 V between the discharge and charge plateaus at a current density 100 mA gcathode-1, and can deliver cycling stability over 20 cycles. This study shows that MnCo2O4 nanospheres can be a promising cathode electrocatalyst in rechargeable lithium-oxygen batteries due to its enhanced catalytic activity towards the ORR and OER.",

author = "Lu Zou and Junfang Cheng and Yuexing Jiang and Yingpeng Gong and Bo Chi and Jian Pu and Li Jian",

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T1 - Spinel MnCo2O4 nanospheres as an effective cathode electrocatalyst for rechargeable lithium-oxygen batteries

AU - Zou, Lu

AU - Cheng, Junfang

AU - Jiang, Yuexing

AU - Gong, Yingpeng

AU - Chi, Bo

AU - Pu, Jian

AU - Jian, Li

PY - 2016

Y1 - 2016

N2 - The air cathode is vital for lithium-oxygen batteries (LOBs) to achieve high performance, which will facilitate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during the discharge and charge processes. In this paper, MnCo2O4 nanospheres prepared through the hydroxide co-precipitation method are investigated as an effective electrocatalyst for the ORR and OER in non-aqueous LOBs. The results show that a non-aqueous LOB with the electrocatalyst exhibits an excellent discharge capacity of 8518 mA h gcathode-1 with a narrow voltage gap of 0.85 V between the discharge and charge plateaus at a current density 100 mA gcathode-1, and can deliver cycling stability over 20 cycles. This study shows that MnCo2O4 nanospheres can be a promising cathode electrocatalyst in rechargeable lithium-oxygen batteries due to its enhanced catalytic activity towards the ORR and OER.

AB - The air cathode is vital for lithium-oxygen batteries (LOBs) to achieve high performance, which will facilitate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during the discharge and charge processes. In this paper, MnCo2O4 nanospheres prepared through the hydroxide co-precipitation method are investigated as an effective electrocatalyst for the ORR and OER in non-aqueous LOBs. The results show that a non-aqueous LOB with the electrocatalyst exhibits an excellent discharge capacity of 8518 mA h gcathode-1 with a narrow voltage gap of 0.85 V between the discharge and charge plateaus at a current density 100 mA gcathode-1, and can deliver cycling stability over 20 cycles. This study shows that MnCo2O4 nanospheres can be a promising cathode electrocatalyst in rechargeable lithium-oxygen batteries due to its enhanced catalytic activity towards the ORR and OER.

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Spinel MnCo₂O₄ nanospheres as an effective cathode electrocatalyst for rechargeable lithium-oxygen batteries

Abstract

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