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Graphite felt modified with nanodispersed bismuth was studied as electrode in the positive half-cell of a vanadium redox flow battery (VRFB). The felt was easily modified by immersion in a Bi 2 O 3 solution followed by thermal reduction at 450°C in air. Despite the low metal content (1at.%) on the surface of the fibers, the Bi-modified felt showed an excellent electrochemical performance...
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