Dutta, Prasit Kumar, Myung, Yoon, Venkiteswaran, Rohini Kulangaramadom, Mehdi, Layla ORCID: 0000-0002-8281-9524, Browning, Nigel
ORCID: 0000-0003-0491-251X, Banerjee, Parag and Mitra, Sagar
(2019)
Mechanism of Na-Ion Storage in BiOCl Anode and the Sodium-Ion Battery Formation.
JOURNAL OF PHYSICAL CHEMISTRY C, 123 (18).
pp. 11500-11507.
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Abstract
We systematically unravel the mechanism by which sodium ion reacts electrochemically with ionically layered BiOCl nanosheets. Solution-processed BiOCl nanosheets were cycled using slow scan cyclic voltammetry (50 μV s-1) to reach the desired reaction voltages. Characterizations using in situ impedance spectroscopy and ex situ X-ray diffraction, Raman spectroscopy, and transmission electron microscopy are used to map the mechanism of Na-ion insertion and deinsertion in BiOCl nanosheets. It was found that BiOCl initially undergoes a conversion reaction to form metallic Bi. The metallic Bi further alloys with sodium ion to form Na3Bi and NaBi, a compound whose formation has not been reported before. We also detect the formation of BiO, Na3BiO4, and NaBiO3. Finally, BiOCl is used as anode against a Prussian blue cathode to prepare a full cell that is capable of providing an average discharge potential of ∼2.2 V at the 100th cycle. The overall study reveals new insights and key differences in the mechanism of sodium-based electrochemical energy storage systems.
Item Type: | Article |
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Depositing User: | Symplectic Admin |
Date Deposited: | 13 Jun 2019 12:15 |
Last Modified: | 19 Jan 2023 00:40 |
DOI: | 10.1021/acs.jpcc.9b01807 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3045681 |