Anomalous Enhancement of Li-O2 Battery Performance with Li2O2 Films Assisted by NiFeOx Nanofiber Catalysts: Insights into Morphology Control

Jiaqiang Huang; Biao Zhang; Zhaowen Bai; Ruiqiang Guo; Zheng-Long Xu; Zoya Sadighi; Lei Qin; Tong-Yi Zhang; Guohua Chen; Baoling Huang; Jang-Kyo Kim

doi:10.1002/adfm.201603178

Anomalous Enhancement of Li-O₂ Battery Performance with Li₂O₂ Films Assisted by NiFeO_x Nanofiber Catalysts: Insights into Morphology Control

Jiaqiang Huang, Biao Zhang, Zhaowen Bai, Ruiqiang Guo, Zheng-Long Xu, Zoya Sadighi, Lei Qin, Tong-Yi Zhang, Guohua Chen, Baoling Huang^*, Jang-Kyo Kim

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

50 Citations (Scopus)

Abstract

It is generally understood that particle-shaped Li₂O₂ is preferred in Li-O₂ batteries (LOBs) because the dominance of Li₂O₂ films may lead to poor electrochemical performance. The influence of Li₂O₂ morphology and its nucleation mechanism are probed by experiments along with the first-principle calculations. It is revealed that the LOBs with Li₂O₂ films deliver unexpectedly improved capacities, longer cycles, and significantly reduced overpotentials assisted by NiFeO_x nanofiber catalysts. The energetically favored Li 2a vacancies under LiO₂-rich conditions, small crystallites, and large contact areas with the electrode/electrolyte explain the anomalous performance enhancement. Li₂O₂ films are formed by a heterogeneous nucleation mechanism and the voltage applied, electrolyte, electrode surface, and use of catalysts are identified as the parameters controlling the mechanisms. The mapped correlations among these parameters shed light on the control of Li₂O₂ morphology for developing high-performance LOBs.

Original language	English
Pages (from-to)	8290-8299
Journal	Advanced Functional Materials
Volume	26
Issue number	45
DOIs	https://doi.org/10.1002/adfm.201603178
Publication status	Published - 6 Dec 2016
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

heterogeneous nucleation
Li2O2 films
lithium-oxygen batteries
morphology control
oxygen-rich Li2O2

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Cite this

@article{08314f40ec144682aeccb02d719ae11c,

title = "Anomalous Enhancement of Li-O2 Battery Performance with Li2O2 Films Assisted by NiFeOx Nanofiber Catalysts: Insights into Morphology Control",

abstract = "It is generally understood that particle-shaped Li2O2 is preferred in Li-O2 batteries (LOBs) because the dominance of Li2O2 films may lead to poor electrochemical performance. The influence of Li2O2 morphology and its nucleation mechanism are probed by experiments along with the first-principle calculations. It is revealed that the LOBs with Li2O2 films deliver unexpectedly improved capacities, longer cycles, and significantly reduced overpotentials assisted by NiFeOx nanofiber catalysts. The energetically favored Li 2a vacancies under LiO2-rich conditions, small crystallites, and large contact areas with the electrode/electrolyte explain the anomalous performance enhancement. Li2O2 films are formed by a heterogeneous nucleation mechanism and the voltage applied, electrolyte, electrode surface, and use of catalysts are identified as the parameters controlling the mechanisms. The mapped correlations among these parameters shed light on the control of Li2O2 morphology for developing high-performance LOBs.",

keywords = "heterogeneous nucleation, Li2O2 films, lithium-oxygen batteries, morphology control, oxygen-rich Li2O2",

author = "Jiaqiang Huang and Biao Zhang and Zhaowen Bai and Ruiqiang Guo and Zheng-Long Xu and Zoya Sadighi and Lei Qin and Tong-Yi Zhang and Guohua Chen and Baoling Huang and Jang-Kyo Kim",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2016",

month = dec,

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doi = "10.1002/adfm.201603178",

language = "English",

volume = "26",

pages = "8290--8299",

journal = "Advanced Functional Materials",

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Anomalous Enhancement of Li-O₂ Battery Performance with Li₂O₂ Films Assisted by NiFeO_x Nanofiber Catalysts: Insights into Morphology Control. / Huang, Jiaqiang; Zhang, Biao; Bai, Zhaowen et al.
In: Advanced Functional Materials, Vol. 26, No. 45, 06.12.2016, p. 8290-8299.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Anomalous Enhancement of Li-O2 Battery Performance with Li2O2 Films Assisted by NiFeOx Nanofiber Catalysts

T2 - Insights into Morphology Control

AU - Huang, Jiaqiang

AU - Zhang, Biao

AU - Bai, Zhaowen

AU - Guo, Ruiqiang

AU - Xu, Zheng-Long

AU - Sadighi, Zoya

AU - Qin, Lei

AU - Zhang, Tong-Yi

AU - Chen, Guohua

AU - Huang, Baoling

AU - Kim, Jang-Kyo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/12/6

Y1 - 2016/12/6

N2 - It is generally understood that particle-shaped Li2O2 is preferred in Li-O2 batteries (LOBs) because the dominance of Li2O2 films may lead to poor electrochemical performance. The influence of Li2O2 morphology and its nucleation mechanism are probed by experiments along with the first-principle calculations. It is revealed that the LOBs with Li2O2 films deliver unexpectedly improved capacities, longer cycles, and significantly reduced overpotentials assisted by NiFeOx nanofiber catalysts. The energetically favored Li 2a vacancies under LiO2-rich conditions, small crystallites, and large contact areas with the electrode/electrolyte explain the anomalous performance enhancement. Li2O2 films are formed by a heterogeneous nucleation mechanism and the voltage applied, electrolyte, electrode surface, and use of catalysts are identified as the parameters controlling the mechanisms. The mapped correlations among these parameters shed light on the control of Li2O2 morphology for developing high-performance LOBs.

AB - It is generally understood that particle-shaped Li2O2 is preferred in Li-O2 batteries (LOBs) because the dominance of Li2O2 films may lead to poor electrochemical performance. The influence of Li2O2 morphology and its nucleation mechanism are probed by experiments along with the first-principle calculations. It is revealed that the LOBs with Li2O2 films deliver unexpectedly improved capacities, longer cycles, and significantly reduced overpotentials assisted by NiFeOx nanofiber catalysts. The energetically favored Li 2a vacancies under LiO2-rich conditions, small crystallites, and large contact areas with the electrode/electrolyte explain the anomalous performance enhancement. Li2O2 films are formed by a heterogeneous nucleation mechanism and the voltage applied, electrolyte, electrode surface, and use of catalysts are identified as the parameters controlling the mechanisms. The mapped correlations among these parameters shed light on the control of Li2O2 morphology for developing high-performance LOBs.

KW - heterogeneous nucleation

KW - Li2O2 films

KW - lithium-oxygen batteries

KW - morphology control

KW - oxygen-rich Li2O2

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DO - 10.1002/adfm.201603178

M3 - RGC 21 - Publication in refereed journal

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JO - Advanced Functional Materials

JF - Advanced Functional Materials

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