Volume 55, Issue 26 pp. 7474-7477
Communication

Flexible Aqueous Lithium-Ion Battery with High Safety and Large Volumetric Energy Density

Dr. Xiaoli Dong

Dr. Xiaoli Dong

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433 China

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Long Chen

Long Chen

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433 China

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Xiuli Su

Xiuli Su

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433 China

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Prof. Yonggang Wang

Corresponding Author

Prof. Yonggang Wang

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433 China

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Prof. Yongyao Xia

Prof. Yongyao Xia

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433 China

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First published: 09 May 2016
Citations: 159

Graphical Abstract

Wearable electronic devices: A wearable aqueous lithium-ion battery based on a spinel Li1.1Mn2O4 cathode and a carbon-coated LiTi2(PO4)3 anode offered a high safety standard and showed excellent flexibility, and a large volumetric energy density.

Abstract

A flexible and wearable aqueous lithium-ion battery is introduced based on spinel Li1.1Mn2O4 cathode and a carbon-coated NASICON-type LiTi2(PO4)3 anode (NASICON=sodium-ion super ionic conductor). Energy densities of 63 Wh kg−1 or 124 mWh cm−3 and power densities of 3 275 W kg−1 or 11.1 W cm−3 can be obtained, which are seven times larger than the largest reported till now. The full cell can keep its capacity without significant loss under different bending states, which shows excellent flexibility. Furthermore, two such flexible cells in series with an operation voltage of 4 V can be compatible with current nonaqueous Li-ion batteries. Therefore, such a flexible cell can potentially be put into practical applications for wearable electronics. In addition, a self-chargeable unit is realized by integrating a single flexible aqueous Li-ion battery with a commercial flexible solar cell, which may facilitate the long-time outdoor operation of flexible and wearable electronic devices.

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