The influence of large cations on the electrochemical properties of tunnel-structured metal oxides

Yifei Yuan, Chun Zhan, Kun He, Hungru Chen, Wentao Yao, Soroosh Sharifi-Asl, Boao Song, Zhenzhen Yang, Anmin Nie, Xiangyi Luo, Hao Wang, Stephen M. Wood, Khalil Amine, M. Saiful Islam, Jun Lu, Reza Shahbazian-Yassar

Research output: Contribution to journalArticle

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Abstract

Metal oxides with a tunnelled structure are attractive as charge storage materials for rechargeable batteries and supercapacitors, since the tunnels enable fast reversible insertion/extraction of charge carriers (for example, lithium ions). Common synthesis methods can introduce large cations such as potassium, barium and ammonium ions into the tunnels, but how these cations affect charge storage performance is not fully understood. Here, we report the role of tunnel cations in governing the electrochemical properties of electrode materials by focusing on potassium ions in α-MnO2. We show that the presence of cations inside 2 × 2 tunnels of manganese dioxide increases the electronic conductivity, and improves lithium ion diffusivity. In addition, transmission electron microscopy analysis indicates that the tunnels remain intact whether cations are present in the tunnels or not. Our systematic study shows that cation addition to α-MnO2 has a strong beneficial effect on the electrochemical performance of this material.

LanguageEnglish
Article number13374
JournalNature Communications
Volume7
DOIs
StatusPublished - 21 Nov 2016

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Electrochemical properties
Oxides
metal oxides
tunnels
Cations
Tunnels
Metals
cations
Ions
Lithium
potassium
Potassium
ions
lithium
Secondary batteries
electrochemical capacitors
Barium
electrode materials
Charge carriers
dioxides

Cite this

Yuan, Y., Zhan, C., He, K., Chen, H., Yao, W., Sharifi-Asl, S., ... Shahbazian-Yassar, R. (2016). The influence of large cations on the electrochemical properties of tunnel-structured metal oxides. DOI: 10.1038/ncomms13374

The influence of large cations on the electrochemical properties of tunnel-structured metal oxides. / Yuan, Yifei; Zhan, Chun; He, Kun; Chen, Hungru; Yao, Wentao; Sharifi-Asl, Soroosh; Song, Boao; Yang, Zhenzhen; Nie, Anmin; Luo, Xiangyi; Wang, Hao; Wood, Stephen M.; Amine, Khalil; Islam, M. Saiful; Lu, Jun; Shahbazian-Yassar, Reza.

In: Nature Communications, Vol. 7, 13374, 21.11.2016.

Research output: Contribution to journalArticle

Yuan, Y, Zhan, C, He, K, Chen, H, Yao, W, Sharifi-Asl, S, Song, B, Yang, Z, Nie, A, Luo, X, Wang, H, Wood, SM, Amine, K, Islam, MS, Lu, J & Shahbazian-Yassar, R 2016, 'The influence of large cations on the electrochemical properties of tunnel-structured metal oxides' Nature Communications, vol. 7, 13374. DOI: 10.1038/ncomms13374
Yuan Y, Zhan C, He K, Chen H, Yao W, Sharifi-Asl S et al. The influence of large cations on the electrochemical properties of tunnel-structured metal oxides. Nature Communications. 2016 Nov 21;7. 13374. Available from, DOI: 10.1038/ncomms13374
Yuan, Yifei ; Zhan, Chun ; He, Kun ; Chen, Hungru ; Yao, Wentao ; Sharifi-Asl, Soroosh ; Song, Boao ; Yang, Zhenzhen ; Nie, Anmin ; Luo, Xiangyi ; Wang, Hao ; Wood, Stephen M. ; Amine, Khalil ; Islam, M. Saiful ; Lu, Jun ; Shahbazian-Yassar, Reza. / The influence of large cations on the electrochemical properties of tunnel-structured metal oxides. In: Nature Communications. 2016 ; Vol. 7.
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