Jianhong Yi

Superhydrophobicity via organophosphonic acid derivatised aluminium films

Organophosphonic acid derivatisation on aluminium surfaces had been demonstrated to be effective for surface energy control. By following the surface energy control strategy, surperhydrophobic Al surfaces had been achieved via microcolumn pattern and dodecylphosphonic acid (DDPA) derivatisation. The water contact and sliding angles of the superhydrophobic Al surfaces were respectively 156 and 5°. Measurements confirmed that the linkage between DDPA and Al are mainly bidentate P–O–Al. The wetting properties as well as the mechanical durability of the superhydrophobic Al surfaces were tested and discussed.

Vertically aligned polyaniline nanowire arrays for lithium-ion battery

Polyaniline (PANI) nanowire arrays have been prepared for the first time using Na5V12O32 nanowires as a sacrificial template. Fourier-transformed infrared spectroscopy and energy-dispersive X-ray spectroscopy were used to characterize the as-prepared PANI nanowire arrays. Further, the electrochemical properties of the PANI nanowire arrays for lithium-ion batteries were investigated with cyclic voltammetry, galvanostatic charge-discharge experiment, and rate performance. It delivered a high discharge capacity of 119.79xa0mAxa0hxa0g−1 after 100 cycles between 2.0 and 4.0xa0V at 30xa0mAxa0g−1.