Healing of dendrites in secondary metal batteries
Authors
Hundekar, Prateek
ORCID
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Other Contributors
Koratkar, Nikhil A. A.
Shi, Yunfeng
Narayanan, Shankar
Shi, Shanbin
Shi, Yunfeng
Narayanan, Shankar
Shi, Shanbin
Issue Date
2020-05
Keywords
Mechanical engineering
Degree
PhD
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
Potassium (K) batteries offer a sustainable and low cost alternative to Li-ion technology. The utilization of K metal anodes allows for the development of high power potassium batteries. However, like Li, K metal anodes are observed to develop dendrites on electrochemical cycling that pose serious safety concerns. In this work, we show that potassium dendrites can be healed in a potassium metal battery by means of joule-heat assisted self-diffusion. It was observed that the potassium dendrites could be healed at a current density an order of magnitude lower than that required to heal lithium dendrites. We show that the reason for this is the far greater mobility of surface atoms of K metal compared to that of Li metal. Such in-situ healing of dendrites could eliminate the risk of short circuiting and enable safe deployment of metal batteries for the next generation of high performance energy storage devices.
Description
May 2020
School of Engineering
School of Engineering
Department
Dept. of Mechanical, Aerospace, and Nuclear Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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