Characterization of MoS2–Graphene Composites for High-Performance Coin Cell Supercapacitors

• DOI: 10.1021/acsami.5b04672
• Publication Date: 2015-07-21T13:06:42Z
• Authors: Mark A. Bissett; Ian A. Kinloch; Robert A. W. Dryfe
• Keywords: Pseudocapacitance; Exfoliation joint; Molybdenum disulfide

Two-dimensional materials, such as graphene and molybdenum disulfide (MoS2), can greatly increase the performance of electrochemical energy storage devices because combination high surface area electrical conductivity. Here, we have investigated solution exfoliated MoS2 thin flexible membranes supercapacitor electrodes in a symmetrical coin cell arrangement using an aqueous electrolyte (Na2SO4). By adding highly conductive to form nanocomposite membranes, it was possible specific capacitance by reducing resistivity electrode altering morphology membrane. With continued charge/discharge cycles found significantly (up 800%), partial re-exfoliation layered material with ion intercalation, well increasing through intercalation pseudocapacitance. These results demonstrate simple scalable application 2D materials toward storage.