High Performance Pseudocapacitor Based on 2D Layered Metal Chalcogenide Nanocrystals

作者：Muller, Guillaume A.^*; Cook, John B.; Kim, Hyung-Seok; Tolbert, Sarah H.; Dunn, Bruce

来源：Nano Letters, 2015, 15(3): 1911-1917.

DOI：10.1021/nl504764m

• TiS2
• chalcogenides
• in-situ synchitrori diffraction
• pseudocapacitors
• intercalation kinetics
• electrochemical energy storage

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 characteristic's are consistent with intercalation pseudocapacitance, leading to materials that exhibit both high energYand power density.

• 出版日期2015-3