An exquisite electrode material using aramid nanofibers with enhanced discharge capacity and catalytic conversion of polysulfides
JOURNAL OF MATERIALS CHEMISTRY A(2020)
摘要
Composite materials obtained by in situ growth of metal nanoparticles on a three-dimensional carbon network are approved as promising electrode materials. Herein, we simply split a polymer chain into a single chain to attract metal-cations, and then obtain a three-dimensional carbon fiber composite with in situ grown manganese oxide nanoparticles (MnO@N-CNFs) in the subsequent pyrolysis process. It can be used not only as an electrode material for supercapacitors, but also as a cathode host for lithium-sulfur batteries. After the capacitance performance test, MnO@N-CNFs were found to have a discharge capacity greater than the charge capacity. As a cathode host for a lithium-sulfur battery, they attract a large amount of polysulfide to accelerate conversion from the long-chain molecules to short-chain molecules, which can improve the kinetics during the electrochemical process.
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