A stable lithiated silicon-chalcogen battery via synergetic chemical coupling between silicon and selenium

Eom K, Lee JT, Oschatz M, Wu F, Kaskel S, Yushin G, Fuller TF (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 8

Article Number: 13888

DOI: 10.1038/ncomms13888

Abstract

Li-ion batteries dominate portable energy storage due to their exceptional power and energy characteristics. Yet, various consumer devices and electric vehicles demand higher specific energy and power with longer cycle life. Here we report a full-cell battery that contains a lithiated Si/graphene anode paired with a selenium disulfide (SeS2) cathode with high capacity and long-term stability. Selenium, which dissolves from the SeS2 cathode, was found to become a component of the anode solid electrolyte interphase (SEI), leading to a significant increase of the SEI conductivity and stability. Moreover, the replacement of lithium metal anode impedes unwanted side reactions between the dissolved intermediate products from the SeS2 cathode and lithium metal and eliminates lithium dendrite formation. As a result, the capacity retention of the lithiated silicon/graphene - SeS2 full cell is 81% after 1,500 cycles at 268 mAgSeS2 ^-1. The achieved cathode capacity is 403 mAhgSeS2 ^-1 (1,209 mAhcmSeS2 ^-3).

Involved external institutions

Georgia Institute of Technology

United States (USA) (US) Technische Universität Dresden

Germany (DE)

How to cite

APA:

Eom, K., Lee, J.T., Oschatz, M., Wu, F., Kaskel, S., Yushin, G., & Fuller, T.F. (2017). A stable lithiated silicon-chalcogen battery via synergetic chemical coupling between silicon and selenium. Nature Communications, 8. https://doi.org/10.1038/ncomms13888

MLA:

Eom, Kwangsup, et al. "A stable lithiated silicon-chalcogen battery via synergetic chemical coupling between silicon and selenium." Nature Communications 8 (2017).

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