Sung Pil Woo

Data on fuel cell performance of Nafion® based hybrid composite membrane containing GO and dihydrogen phosphate functionalized ionic liquid at 70 °C under anhydrous condition

This data provides the fuel cell performance of Nafion based hybrid membranes containing GO and dihydrogen phosphate functionalized ionic liquid (IL) at 70 °C under anhydrous condition. Readers are requested to go through the article entitled “Nafion® based hybrid composite membrane containing GO and dihydrogen phosphate functionalized ionic liquid for high temperature polymer electrolyte membrane fuel cell” (Maiti et al., 2017) [1] for further interpretation and discussion.

Increase in the corrosion resistance of stainless steel bipolar plates by the formation of thermally-induced Cr-nitride

Cr-nitride layer is formed on the surface of Cr-electroplated stainless steel to use metallic bipolar plates of polymer electrolyte membrane fuel cell (PEMFC). The dense and continuous Cr-nitride layer is confirmed by scanning electron microscope (SEM) results. The corrosion resistance results in aggressive environments of PEMFC reveal that the corrosion current density of 0.5 μA cm−2 and 0.5 μA cm−2 are presented in anodic and cathodic environments of PEMFC, respectively. The highest protective efficiency of 99.9% is recorded in the cathodic condition. The dense Cr-nitride layer provides sufficient corrosion resistance. Moreover, the interfacial contact resistance (ICR) of Cr-nitride layer is significantly decreased up to 15 mΩ cm−2 compared with pure stainless steel and the ICR is maintained after corrosion tests. This analysis indicates that the improvement is originating solely from dense Cr-nitride layer on the surface.

Electrochemical Performance of LiMn0.5-XNi0.5-XAl2XO2 by Hydrothermal Method

In lithium ion batteries, lithium cobalt oxide is extensively used as a cathode material. However, cobalt has high cost and toxicity, researchers have been investigating for the development of a cobalt free cathode material. LiMn0.475Ni0.475Al0.05O2 is one of the most alternative materials due to its high capacity and energy density. Besides, Al is used to improve the stability. Al-substituted LiMn0.475Ni0.475Al0.05O2 exhibits high rate capability and cycle performance. The hydrothermal method of LiMn0.5-xNi0.5-xAl2xO2 (x = 0.01, 0.02, 0.05, 0.1) results in enhancement of electrochemical performance and stability. The precursors were prepared by stirring in a mixture of de-ionized water and NH4OH for 2h. Afterwards, the mixtures were heated in a Teflon lined autoclave for 4h followed by calcination at 900 °C for 12h. The cyclic performance of LiMn0.5-xNi0.5-xAl2xO2 was measured in the range of 2.0 to 4.5 V. It was observed that LiMn0.5-xNi0.5-xAl2xO2 exhibited the highest capacity at x = 0.05.

Electrochemical Performance of LiMn 0.5-X Ni 0.5-X Al 2X O 2 by Hydrothermal Method

In lithium ion batteries, lithium cobalt oxide is extensively used as a cathode material. However, cobalt has high cost and toxicity, researchers have been investigating for the development of a cobalt free cathode material. LiMn0.475Ni0.475Al0.05O2 is one of the most alternative materials due to its high capacity and energy density. Besides, Al is used to improve the stability. Al-substituted LiMn0.475Ni0.475Al0.05O2 exhibits high rate capability and cycle performance. The hydrothermal method of LiMn0.5-xNi0.5-xAl2xO2 (x = 0.01, 0.02, 0.05, 0.1) results in enhancement of electrochemical performance and stability. The precursors were prepared by stirring in a mixture of de-ionized water and NH4OH for 2h. Afterwards, the mixtures were heated in a Teflon lined autoclave for 4h followed by calcination at 900 °C for 12h. The cyclic performance of LiMn0.5-xNi0.5-xAl2xO2 was measured in the range of 2.0 to 4.5 V. It was observed that LiMn0.5-xNi0.5-xAl2xO2 exhibited the highest capacity at x = 0.05.