WS2-Graphite Dual-Ion Batteries

Bellani S, Wang F, Longoni G, Najafi L, Oropesa-Nunez R, Castillo AEDR, Prato M, Zhuang X, Pellegrini V, Feng X, Bonaccorso F (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Nano Letters American Chemical Society

Book Volume: 18

Pages Range: 7155-7164

Journal Issue: 11

DOI: 10.1021/acs.nanolett.8b03227

Abstract

A novel WS2-graphite dual-ion battery (DIB) is developed by combining a conventional graphite cathode and a high-capacity few-layer WS2-flake anode. The WS2 flakes are produced by exploiting wet-jet milling (WJM) exfoliation, which allows large-scale and free-material loss production (i.e., volume up to 8 L h^-1 at concentration of 10 g L^-1 and exfoliation yield of 100%) of few-layer WS2 flakes in dispersion. The WS2 anodes enable DIBs, based on hexafluorophosphate (PF6 ^-) and lithium (Li⁺) ions, to achieve charge-specific capacities of 457, 438, 421, 403, 295, and 169 mAh g^-1 at current rates of 0.1, 0.2, 0.3, 0.4, 0.8, and 1.0 A g^-1, respectively, outperforming conventional DIBs. The WS2-based DIBs operate in the 0 to 4 V cell voltage range, thus extending the operating voltage window of conventional WS2-based Li-ion batteries (LIBs). These results demonstrate a new route toward the exploitation of WS2, and possibly other transition-metal dichalcogenides, for the development of next-generation energy-storage devices.

Involved external institutions

Italian Institute of Technology / Istituto Italiano di Tecnologia (IIT)

Italy (IT) Technische Universität Dresden

Germany (DE) BeDimensional

Italy (IT)

How to cite

APA:

Bellani, S., Wang, F., Longoni, G., Najafi, L., Oropesa-Nunez, R., Castillo, A.E.D.R.,... Bonaccorso, F. (2018). WS2-Graphite Dual-Ion Batteries. Nano Letters, 18(11), 7155-7164. https://doi.org/10.1021/acs.nanolett.8b03227

MLA:

Bellani, Sebastiano, et al. "WS2-Graphite Dual-Ion Batteries." Nano Letters 18.11 (2018): 7155-7164.

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