Operando characterization of cathodic reactions in a liquid-state lithium-oxygen micro-battery by scanning transmission electron microscopy

Pan Liu, Jiuhui Han, Xianwei Guo, Yoshikazu Ito, Chuchu Yang, Shoucong Ning, Takeshi Fujita, Akihiko Hirata, Mingwei Chen

研究成果: Article

5 引用 (Scopus)

抄録

Rechargeable non-aqueous lithium-oxygen batteries with a large theoretical capacity are emerging as a high-energy electrochemical device for sustainable energy strategy. Despite many efforts made to understand the fundamental Li-O2 electrochemistry, the kinetic process of cathodic reactions, associated with the formation and decomposition of a solid Li2O2 phase during charging and discharging, remains debate. Here we report direct visualization of the charge/discharge reactions on a gold cathode in a non-aqueous lithium-oxygen micro-battery using liquid-cell aberration-corrected scanning transmission electron microscopy (STEM) combining with synchronized electrochemical measurements. The real-time and real-space characterization by time-resolved STEM reveals the electrochemical correspondence of discharge/charge overpotentials to the nucleation, growth and decomposition of Li2O2 at a constant current density. The nano-scale operando observations would enrich our knowledge on the underlying reaction mechanisms of lithium-oxygen batteries during round-trip discharging and charging and shed lights on the strategies in improving the performances of lithium-oxygen batteries by tailoring the cathodic reactions.

元の言語English
記事番号3134
ジャーナルScientific Reports
8
発行部数1
DOI
出版物ステータスPublished - 2018 12 1
外部発表Yes

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Lithium
Oxygen
Transmission electron microscopy
Scanning electron microscopy
Liquids
Decomposition
Electrochemistry
Aberrations
Gold
Cathodes
Nucleation
Current density
Visualization
Kinetics

ASJC Scopus subject areas

  • General

これを引用

Operando characterization of cathodic reactions in a liquid-state lithium-oxygen micro-battery by scanning transmission electron microscopy. / Liu, Pan; Han, Jiuhui; Guo, Xianwei; Ito, Yoshikazu; Yang, Chuchu; Ning, Shoucong; Fujita, Takeshi; Hirata, Akihiko; Chen, Mingwei.

:: Scientific Reports, 巻 8, 番号 1, 3134, 01.12.2018.

研究成果: Article

Liu, Pan ; Han, Jiuhui ; Guo, Xianwei ; Ito, Yoshikazu ; Yang, Chuchu ; Ning, Shoucong ; Fujita, Takeshi ; Hirata, Akihiko ; Chen, Mingwei. / Operando characterization of cathodic reactions in a liquid-state lithium-oxygen micro-battery by scanning transmission electron microscopy. :: Scientific Reports. 2018 ; 巻 8, 番号 1.
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AU - Yang, Chuchu

AU - Ning, Shoucong

AU - Fujita, Takeshi

AU - Hirata, Akihiko

AU - Chen, Mingwei

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