title: High performance pseudocapacitor based on 2D layered metal chalcogenide nanocrystals.
abstract: Single-layer and few-layer transition metal dichalcogenides have been extensively studied for their electronic properties, but their energy-storage potential has not been well explored. This paper describes the structural and electrochemical properties of few-layer TiS2 nanocrystals. The two-dimensional morphology leads to very different behavior, compared to corresponding bulk materials. Only small structural changes occur during lithiation/delithiation and charge storage characteristics are consistent with intercalation pseudocapacitance, leading to materials that exhibit both high energy and power density.
authors: Department of Materials Science and Engineering and ‡Department of Chemistry and Biochemistry, UCLA , Los Angeles, California 90095-1595, United States.
authors: Guillaume A
authors: GA
authors: Muller
authors: John B
authors: JB
authors: Cook
authors: Hyung-Seok
authors: HS
authors: Kim
authors: Sarah H
authors: SH
authors: Tolbert
authors: Bruce
authors: B
authors: Dunn
mesh_terms: D018011:Chalcogens / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D025802:Electric Capacitance; D011211:Electric Power Supplies; D004581:Electronics / Q000295:instrumentation*; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*
chemical_list: D018011:Chalcogens
keywords: TiS2; chalcogenides; electrochemical energy storage; in-situ synchrotron diffraction; intercalation kinetics; pseudocapacitors