Lithium titanate hydrates with superfast and stable cycling in lithium ion batteries
Name
Wang_et_al-2017-Nature_Communications (2).pdf
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Checksum (MD5)
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Author(s)
Wang, Shitong
Quan, Wei
Zhu, Zhi
Yang, Yong
Liu, Qi
Ren, Yang
Zhang, Xiaoyi
Xu, Rui
Hong, Ye
Zhang, Zhongtai
Date Issued
September 2017
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Wang, Shitong et al. “Lithium Titanate Hydrates with Superfast and Stable Cycling in Lithium Ion Batteries.” Nature Communications 8, 1 (September 2017): 627 © 2017 The Author(s)
Version
Final published version
Abstract
Lithium titanate and titanium dioxide are two best-known high-performance electrodes that can cycle around 10,000 times in aprotic lithium ion electrolytes. Here we show there exists more lithium titanate hydrates with superfast and stable cycling. That is, water promotes structural diversity and nanostructuring of compounds, but does not necessarily degrade electrochemical cycling stability or performance in aprotic electrolytes. As a lithium ion battery anode, our multi-phase lithium titanate hydrates show a specific capacity of about 130 mA h g⁻¹ at ∼35 C (fully charged within ∼100 s) and sustain more than 10,000 cycles with capacity fade of only 0.001% per cycle. In situ synchrotron diffraction reveals no 2-phase transformations, but a single solid-solution behavior during battery cycling. So instead of just a nanostructured intermediate to be calcined, lithium titanate hydrates can be the desirable final destination.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Creative Commons Attribution 4.0 International
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DOI of Published Version
https://doi.org/10.1038/s41467-017-00574-9
