MnO2synergized with N/S codoped graphene as a flexible cathode efficient electrocatalyst for advanced honeycomb-shaped stretchable aluminum-air batteries

Ziyi SHUI, Xiangbiao LIAO, Yuan LEI, Jia NI, Yilun LIU, Yong DAN*, Wei ZHAO*, Xi CHEN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

16 Citations (Scopus)

Abstract

Aluminum-air batteries possess high theoretical specific capacities and energy densities. However, the desired application performance in the field of flexible electronics is limited by the rigid battery structure and slow kinetics of the oxygen reduction reaction (ORR). To address these issues, flexible, stretchable, and customizable aluminum-air batteries with a reference to honeycomb shape are composed of multilayer single battery units to achieve large scalability and start-stop control. The single aluminum-air battery combines MnO2 with N/S codoped graphene to improve the electrocatalytic activity. Benefiting from an efficient electrocatalyst and reasonable structural design, the single aluminum-air battery exhibits excellent electrochemical characteristics under deformation conditions with a high specific capacity and energy density (1203.2 mAh g-1 Al and 1630.1 mWh g-1 Al). Furthermore, the obtained honeycomb-shaped stretchable aluminum-air batteries maintain a stable output voltage over the 2500% stretching. More interestingly, the stretchable honeycomb structure not only can solve the start-stop control problem but also has the potential to reduce the self-corrosion in disposable metal-air batteries. In addition, owing to the customizable shapes and sizes, the honeycomb-shaped stretchable aluminum-air batteries facilitate the integrated application of flexible batteries in wearables. ©
Original languageEnglish
Pages (from-to)12954-12962
Number of pages9
JournalLangmuir
Volume36
Issue number43
Early online date25 Oct 2020
DOIs
Publication statusPublished - 3 Nov 2020
Externally publishedYes

Bibliographical note

This work is supported by the Earth Engineering Center and the Center for Advanced Materials for Energy and the Environment at Columbia University, and the School of Chemical Engineering, Northwest University. Support from the National Natural Science Foundation of China (11572238 and 11872302) and the Key R&D Program of Shaanxi (2018ZDXM-GY-131) is acknowledged. Moreover, the project is supported by the Natural Science Basic Research Plan in Shaanxi Province, China (program no. 2019JQ-431).

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