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https://hdl.handle.net/2440/132314
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Type: | Journal article |
Title: | Unraveling the effect of salt chemistry on long-durability high-phosphorus-concentration anode for potassium ion batteries |
Author: | Zhang, W. Wu, Z. Zhang, J. Liu, G. Yang, N.H. Liu, R.S. Pang, W.K. Li, W. Guo, Z. |
Citation: | Nano Energy, 2018; 53:967-974 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 2211-2855 2211-3282 |
Statement of Responsibility: | Wenchao Zhang, Zhibin Wu, Jian Zhang, Guoping Liu, Nai-Hsuan Yang, Ru-Shi Liu, Wei Kong Pang, Wenwu Li, Zaiping Guo |
Abstract: | Phosphorus-based anode materials are of considerable interest for grid-scale energy storage systems due to their high theoretical capacity. Nevertheless, the low electrical conductivity of P, large volume changes during cycling, and highly-reactive phosphide surface are hindering their potential applications. Herein, outstanding long-term cycling stability with high retained potassium storage capacity (213.7 mA h g⁻¹ over 2000 cycles) was achieved via the introduction of an alternative potassium bis(fluorosulfonyl)imide (KFSI) salt and by using a layered compound (GeP5) with a high phosphorus concentration as anode material. Fourier transform infrared spectroscopic mapping results suggest that KFSI salt helps to form an uniform solid electrolyte interphase (SEI) layer and reduces the side reactions at the electrode/electrolyte interface, thus enhancing the cycling performance. In-operando synchrotron X-ray diffraction analysis has revealed the synergistic reaction mechanisms of the K-P and K-Ge reactions. These findings indicate the enormous potential of phosphorus-based anodes for high-performance potassium ion batteries and can attract broad interest for regulating the SEI layer formation through manipulating the salt chemistry. |
Keywords: | Potassium ion batteries; salt chemistry; phosphorus-based anode; long-durability; synergistic reaction |
Rights: | © 2018 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.nanoen.2018.09.058 |
Grant ID: | http://purl.org/au-research/grants/arc/FT150100109 http://purl.org/au-research/grants/arc/FT160100251 http://purl.org/au-research/grants/arc/DP170102406 http://purl.org/au-research/grants/arc/LE180100141 |
Published version: | http://dx.doi.org/10.1016/j.nanoen.2018.09.058 |
Appears in Collections: | Chemical Engineering publications |
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