Chen, J.-J., Ye, J.-C., Zhang, X.-G., Symes, M. D. , Fan, S.-C., Long, D.-L. , Zheng, M.-S., Wu, D.-Y., Cronin, L. and Dong, Q.-F. (2018) Design and performance of rechargeable sodium ion batteries, and symmetrical li-ion batteries with supercapacitor-like power density based upon polyoxovanadates. Advanced Energy Materials, 8(6), 1701021. (doi: 10.1002/aenm.201701021)
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152483.pdf - Accepted Version 1MB |
Abstract
The polyanion Li7V15O36(CO3) is a nanosized molecular cluster (≈1 nm in size), that has the potential to form an open host framework with a higher surface-to-bulk ratio than conventional transition metal oxide electrode materials. Herein, practical rechargeable Na-ion batteries and symmetric Li-ion batteries are demonstrated based on the polyoxovanadate Li7V15O36(CO3). The vanadium centers in {V15O36(CO3)} do not all have the same VIV/V redox potentials, which permits symmetric devices to be created from this material that exhibit battery-like energy density and supercapacitor-like power density. An ultrahigh specific power of 51.5 kW kg−1 at 100 A g−1 and a specific energy of 125 W h kg−1 can be achieved, along with a long cycling life (>500 cycles). Moreover, electrochemical and theoretical studies reveal that {V15O36(CO3)} also allows the transport of large cations, like Na+, and that it can serve as the cathode material for rechargeable Na-ion batteries with a high specific capacity of 240 mA h g−1 and a specific energy of 390 W h kg−1 for the full Na-ion battery. Finally, the polyoxometalate material from these electrochemical energy storage devices can be easily extracted from spent electrodes by simple treatment with water, providing a potential route to recycling of the redox active material.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Chen, Dr Jiajia and Symes, Professor Mark and Long, Dr Deliang and Cronin, Professor Lee |
| Authors: | Chen, J.-J., Ye, J.-C., Zhang, X.-G., Symes, M. D., Fan, S.-C., Long, D.-L., Zheng, M.-S., Wu, D.-Y., Cronin, L., and Dong, Q.-F. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Advanced Energy Materials |
| Publisher: | Wiley |
| ISSN: | 1614-6832 |
| ISSN (Online): | 1614-6840 |
| Published Online: | 22 November 2017 |
| Copyright Holders: | Copyright © 2017 Wiley-VCH Verlag GmbH & Co. |
| First Published: | First published in Advanced Energy Materials 8(6):1701021 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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