Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries

Yanguo Liu, Haicheng Wan, Nan Jiang, Wanxing Zhang, Hongzhi Zhang, Bingdong Chang, Qing Wang, Yahui Zhang, Zhiyuan Wang, Shaohua Luo, Hongyu Sun*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Cobalt (II, III) oxide (Co3O4) nanostructures have attracted much attention as a candidate for anode materials in lithium-ion batteries (LIBs) due to its unique physical/chemical properties and high specific capacity. However, critical issues, such as low electronic conductivity, inefficient ionic diffusion, and large volume change during battery operation, have to be addressed before practical applications. In this work, we report a facile chemical reduction approach to modify Co3O4 nanocubes by NaBH4 solution treatment. The microstructure and chemical composition analysis indicate that the modified Co3O4 nanocubes are oxygen deficient and other secondary phases are not formed during the processing. The degree of oxygen deficiency can be well controlled by altering the concentration of NaBH4 solution. When evaluated as the anodes for LIBs, the optimized sample shows a reversible capacity of 873.5 mAhg−1 after 50 cycles at a current density of 0.1 Ag−1, and a charge-discharge capacity of 569.1 mAhg−1 at a higher current density of 5 Ag−1. The balanced oxygen deficiency and crystallinity in the chemically reduced nanostructured electrodes are supposed to be responsible for the improved lithium storage properties. We believe that the facile solution-based chemical reduction strategy provides an alternative way to control the defects in different functional nanostructures for broader applications.
Original languageEnglish
JournalSolid State Ionics
Volume334
Pages (from-to)117-124
ISSN0167-2738
DOIs
Publication statusPublished - 2019

Keywords

  • Oxygen deficiency
  • Chemical reduction
  • Co3O4 nanocubes
  • Anode materials
  • Lithium-ion batteries

Cite this

Liu, Yanguo ; Wan, Haicheng ; Jiang, Nan ; Zhang, Wanxing ; Zhang, Hongzhi ; Chang, Bingdong ; Wang, Qing ; Zhang, Yahui ; Wang, Zhiyuan ; Luo, Shaohua ; Sun, Hongyu. / Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries. In: Solid State Ionics. 2019 ; Vol. 334. pp. 117-124.
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title = "Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries",
abstract = "Cobalt (II, III) oxide (Co3O4) nanostructures have attracted much attention as a candidate for anode materials in lithium-ion batteries (LIBs) due to its unique physical/chemical properties and high specific capacity. However, critical issues, such as low electronic conductivity, inefficient ionic diffusion, and large volume change during battery operation, have to be addressed before practical applications. In this work, we report a facile chemical reduction approach to modify Co3O4 nanocubes by NaBH4 solution treatment. The microstructure and chemical composition analysis indicate that the modified Co3O4 nanocubes are oxygen deficient and other secondary phases are not formed during the processing. The degree of oxygen deficiency can be well controlled by altering the concentration of NaBH4 solution. When evaluated as the anodes for LIBs, the optimized sample shows a reversible capacity of 873.5 mAhg−1 after 50 cycles at a current density of 0.1 Ag−1, and a charge-discharge capacity of 569.1 mAhg−1 at a higher current density of 5 Ag−1. The balanced oxygen deficiency and crystallinity in the chemically reduced nanostructured electrodes are supposed to be responsible for the improved lithium storage properties. We believe that the facile solution-based chemical reduction strategy provides an alternative way to control the defects in different functional nanostructures for broader applications.",
keywords = "Oxygen deficiency, Chemical reduction, Co3O4 nanocubes, Anode materials, Lithium-ion batteries",
author = "Yanguo Liu and Haicheng Wan and Nan Jiang and Wanxing Zhang and Hongzhi Zhang and Bingdong Chang and Qing Wang and Yahui Zhang and Zhiyuan Wang and Shaohua Luo and Hongyu Sun",
year = "2019",
doi = "10.1016/j.ssi.2019.02.014",
language = "English",
volume = "334",
pages = "117--124",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",

}

Liu, Y, Wan, H, Jiang, N, Zhang, W, Zhang, H, Chang, B, Wang, Q, Zhang, Y, Wang, Z, Luo, S & Sun, H 2019, 'Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries', Solid State Ionics, vol. 334, pp. 117-124. https://doi.org/10.1016/j.ssi.2019.02.014

Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries. / Liu, Yanguo; Wan, Haicheng; Jiang, Nan; Zhang, Wanxing; Zhang, Hongzhi; Chang, Bingdong; Wang, Qing; Zhang, Yahui; Wang, Zhiyuan; Luo, Shaohua; Sun, Hongyu.

In: Solid State Ionics, Vol. 334, 2019, p. 117-124.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Chemical reduction-induced oxygen deficiency in Co3O4 nanocubes as advanced anodes for lithium ion batteries

AU - Liu, Yanguo

AU - Wan, Haicheng

AU - Jiang, Nan

AU - Zhang, Wanxing

AU - Zhang, Hongzhi

AU - Chang, Bingdong

AU - Wang, Qing

AU - Zhang, Yahui

AU - Wang, Zhiyuan

AU - Luo, Shaohua

AU - Sun, Hongyu

PY - 2019

Y1 - 2019

N2 - Cobalt (II, III) oxide (Co3O4) nanostructures have attracted much attention as a candidate for anode materials in lithium-ion batteries (LIBs) due to its unique physical/chemical properties and high specific capacity. However, critical issues, such as low electronic conductivity, inefficient ionic diffusion, and large volume change during battery operation, have to be addressed before practical applications. In this work, we report a facile chemical reduction approach to modify Co3O4 nanocubes by NaBH4 solution treatment. The microstructure and chemical composition analysis indicate that the modified Co3O4 nanocubes are oxygen deficient and other secondary phases are not formed during the processing. The degree of oxygen deficiency can be well controlled by altering the concentration of NaBH4 solution. When evaluated as the anodes for LIBs, the optimized sample shows a reversible capacity of 873.5 mAhg−1 after 50 cycles at a current density of 0.1 Ag−1, and a charge-discharge capacity of 569.1 mAhg−1 at a higher current density of 5 Ag−1. The balanced oxygen deficiency and crystallinity in the chemically reduced nanostructured electrodes are supposed to be responsible for the improved lithium storage properties. We believe that the facile solution-based chemical reduction strategy provides an alternative way to control the defects in different functional nanostructures for broader applications.

AB - Cobalt (II, III) oxide (Co3O4) nanostructures have attracted much attention as a candidate for anode materials in lithium-ion batteries (LIBs) due to its unique physical/chemical properties and high specific capacity. However, critical issues, such as low electronic conductivity, inefficient ionic diffusion, and large volume change during battery operation, have to be addressed before practical applications. In this work, we report a facile chemical reduction approach to modify Co3O4 nanocubes by NaBH4 solution treatment. The microstructure and chemical composition analysis indicate that the modified Co3O4 nanocubes are oxygen deficient and other secondary phases are not formed during the processing. The degree of oxygen deficiency can be well controlled by altering the concentration of NaBH4 solution. When evaluated as the anodes for LIBs, the optimized sample shows a reversible capacity of 873.5 mAhg−1 after 50 cycles at a current density of 0.1 Ag−1, and a charge-discharge capacity of 569.1 mAhg−1 at a higher current density of 5 Ag−1. The balanced oxygen deficiency and crystallinity in the chemically reduced nanostructured electrodes are supposed to be responsible for the improved lithium storage properties. We believe that the facile solution-based chemical reduction strategy provides an alternative way to control the defects in different functional nanostructures for broader applications.

KW - Oxygen deficiency

KW - Chemical reduction

KW - Co3O4 nanocubes

KW - Anode materials

KW - Lithium-ion batteries

U2 - 10.1016/j.ssi.2019.02.014

DO - 10.1016/j.ssi.2019.02.014

M3 - Journal article

VL - 334

SP - 117

EP - 124

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

ER -