CNT Sheet Air Electrode for the Development of Ultra-High Cell Capacity in Lithium-Air Batteries.

ABSTRACT: Lithium-air batteries (LABs) are expected to provide a cell with a much higher capacity than ever attained before, but their prototype cells present a limited areal cell capacity of no more than 10 mAh cm^-2, mainly due to the limitation of their air electrodes. Here, we demonstrate the use of flexible carbon nanotube (CNT) sheets as a promising air electrode for developing ultra-high capacity in LAB cells, achieving areal cell capacities of up to 30 mAh cm^-2, which is approximately 15 times higher than the capacity of cells with lithium-ion battery (LiB) technology (~2 mAh cm^-2). During discharge, the CNT sheet electrode experienced enormous swelling to a thickness of a few millimeters because of the discharge product deposition of lithium peroxide (Li

SUBMITTER: Nomura A 

PROVIDER: S-EPMC5381228 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature