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Nano Lett. 2019 Mar 13;19(3):1504-1511. doi: 10.1021/acs.nanolett.8b04106. Epub 2018 Nov 29.

Nanocrevasse-Rich Carbon Fibers for Stable Lithium and Sodium Metal Anodes.

Author information

1
School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , South Korea.
2
Energy Materials and Devices Lab , 4TOONE Corporation , UNIST-gil 50 , Ulsan 44919 , South Korea.

Abstract

Metallic lithium (Li) and sodium (Na) anodes have received great attention as ideal anodes to meet the needs for high energy density batteries due to their highest theoretical capacities. Although many approaches have successfully improved the performances of Li or Na metal anodes, many of these methods are difficult to scale up and thus cannot be applied in the production of batteries in practice. In this work, we introduce nanocrevasses in a carbon fiber scaffold which can facilitate the penetration of molten alkali metal into a carbon scaffold by enhancing its wettability for Li/Na metal. The resulting alkali metal/carbon composites exhibit stable long-term cycling over hundreds of cycles. The facile synthetic method is enabled for scalable production using recycled metal waste. Thus, the addition of nanocrevasses to carbon fiber as a scaffold for alkali metals can generate environmentally friendly and cost-effective composites for practical electrode applications.

KEYWORDS:

Alkali metal carbon composite; Li metal anode; Na metal anode; carbon scaffold; scalable production

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