The resolution estimation of wedge and strip anodes Rev. Sci. Instrum. 83, 093107 (2012) Recovery improvement of graphene-based gas sensors functionalized with nanoscale heterojunctions Appl. Phys. Lett. 101, 123504 (2012) High sensitivity SQUID-detection and feedback-cooling of an ultrasoft microcantilever Appl. Phys. Lett. 101, 123101 (2012) Evaluation of rare earth doped silica sub-micrometric spheres as optically controlled temperature sensors J. Appl. Phys. 112, 054702 (2012) A new method to calculate the beam charge for an integrating current transformer Rev. Sci. Instrum. 83, 093302 (2012) Additional information on Appl. Phys. Lett.

No abstract

No abstract

A new redox-active family of aromatic dicyanides was developed as organic electrodes in rechargeable batteries. The detailed electronic properties of two primary representatives of 1,4-dicyanobenzene (DCB) and 9,10-dicyanoanthracene (DCA) were studied. It is discovered that, as compared with DCB, the large aromatic π conjugation in DCA leads to better electron conductivity and more stable reduced states of DCAand DCA 2-. The Li-ion batteries with DCA electrode are shown to have highly reversible operations.

Hierarchical NiCo2 S4 nanotube@NiCo2 S4 nanosheet arrays on Ni foam have been successfully synthesized. Owing to the unique hierarchical structure, enhanced capacitive performance can be attained. A specific capacitance up to 4.38 F cm(-2) is attained at 5 mA cm(-2) , which is much higher than the specific capacitance values of NiCo2 O4 nanosheet arrays, NiCo2 S4 nanosheet arrays and NiCo2 S4 nanotube arrays on Ni foam. The hierarchical NiCo2 S4 nanostructure shows superior cycling stability; after 5000 cycles, the specific capacitance still maintains 3.5 F cm(-2) . In addition, through the morphology and crystal structure measurement after cycling stability test, it is found that the NiCo2 S4 electroactive materials are gradually corroded; however, the NiCo2 S4 phase can still be well-maintained. Our results show that hierarchical NiCo2 S4 nanostructures are suitable electroactive materials for high performance supercapacitors.