DataVXThe Journal of Physical Chemistry CPaper
journal article·2019-05-09

Mechanism of Na-Ion Storage in BiOCl Anode and the Sodium-Ion Battery Formation

Prasit Kumar Dutta, Yoon Myung, Rohini Kulangaramadom Venkiteswaran, Layla Mehdi, Nigel Browning, Parag Banerjee, Sagar Mitra

The Journal of Physical Chemistry C· Volume 123· Issue 18
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Source abstract

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 Na 3 Bi and NaBi, a compound whose formation has not been reported before. We also detect the formation of BiO, Na 3 BiO 4, and NaBiO 3 . 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.
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Research context

Energy storageMetals & alloysNanomaterials

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Inorganic Chemistry and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electrochemical Energy Laboratory, Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India

Department of Mechanical Engineering and Materials Science, One Brookings Drive, Washington University in St. Louis, St. Louis, Missouri 63130, United States

Korea Institute of Industrial Technology, Dongnam Regional Division, Busan 46744, Korea

Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, Washington 99354, United States

Materials Science & Engineering, University of Central Florida—College of Engineering and Computer Science, 4328 Scorpius Street, Orlando, Florida 32816, United States

Funding

Ministry of New and Renewable Energy India · Basic Energy Sciences · National Research Foundation of Korea · Indo-US Science and Technology Forum

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