Testing News-HK Battery Testing-1

A gradient porous cathode for non-aqueous lithium-air batteries leading to a high capacity

Posted on Posted in Neware Testing News

Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

Testing News-HK Battery Testing Testing News-HK Battery Testing-1

The discharge performance of the cathodes was tested in a nonaqueous lithium-air battery that consisted of a lithium foil anode, a glass-fiber separator (Whatman GF/C), and 250 μL 1 M LiTFSI (Sigma-Aldrich, 99.95%) in TEGDME (Sigma-Aldrich, 99%) as the electrolyte to fully saturate the cathode. The entire battery was assembled in an argon-filled glove box (Etelux, Lab 2000) at water and oxygen contents below 1 ppm. All tests were performed at room temperature (25 °C) at the constant oxygen pressure of 1 atm by the battery cycling system (Neware, CT-3008W).
The microscopic structure of the cathode was observed by a scanning electron microscope (SEM, JEOL Inc., JSM-6300) under an acceleration voltage of 20 kV. The discharge product compositionwas analyzed by a Philips high resolution X-ray diffraction system (XRD, model PW 1825) using a Cu-Kα source operating at 40 keV.

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