WS2-graphite dual-ion battery

Abstract

A novel WS2-graphite dual-ion battery (DIB) is developed by combining together a conventional graphite cathode and high-capacity few-layer WS2 flakes anode. The WS2 flakes are produced by exploiting wet-jet milling (WJM) exfoliation, which allows mass production of few-layer WS2 flakes in dispersion, with an exfoliation yield of 100%. 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 towards the exploitation of WS2, and possibly other transition metal dichalcogenides (TMDs), for the development of next-generation energy storage devices.

References in corpus (14)

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• A lithium-ion battery based on a graphene nanoflakes ink anode and a lithium iron phosphate cathode
• Long-lived nanosecond spin relaxation and spin coherence of electrons in monolayer MoS_2 and WS_2
• Synthesis of Large-Area WS2 monolayers with Exceptional Photoluminescence
• High-yield production of 2D crystals by wet-jet milling
• Solution-processed hybrid graphene flake/2H-MoS2 quantum dot heterostructures for efficient electrochemical hydrogen evolution
• Few-layer MoS2 flakes as hole-selective layer for solution-processed hybrid organic hydrogen-evolving photocathodes

Cited by in corpus (8)

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• Graphene-Based Electrodes in a Vanadium Redox Flow Battery Produced by Rapid Low-Pressure Combined Gas Plasma Treatments
• Niobium disulphide (NbS${}_2$)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction
• CVD-graphene/graphene flakes dual-films as advanced DSSC counter electrodes
• Flexible Graphene/Carbon Nanotube Electrochemical Double-Layer Capacitors with Ultrahigh Areal Performance
• Ultrafast Insight into High energy (C, D) Excitons in Few Layer WS2