ZnFe2O4‐C/LiFePO4‐CNT: A Novel High‐Power Lithium‐Ion Battery with Excellent Cycling Performance |
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Authors: | Alberto Varzi Dominic Bresser Jan von Zamory Franziska Müller Stefano Passerini |
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Affiliation: | 1. Institute of Physical Chemistry &, MEET Battery Research Center University of Muenster, Münster, Germany;2. Helmholtz Institute Ulm, Ulm, Germany |
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Abstract: | An innovative and environmentally friendly battery chemistry is proposed for high power applications. A carbon‐coated ZnFe2O4 nanoparticle‐based anode and a LiFePO4‐multiwalled carbon nanotube‐based cathode, both aqueous processed with Na‐carboxymethyl cellulose, are combined, for the first time, in a Li‐ion full cell with exceptional electrochemical performance. Such novel battery shows remarkable rate capabilities, delivering 50% of its nominal capacity at currents corresponding to ≈20C (with respect to the limiting cathode). Furthermore, the pre‐lithiation of the negative electrode offers the possibility of tuning the cell potential and, therefore, achieving remarkable gravimetric energy and power density values of 202 Wh kg?1 and 3.72 W kg?1, respectively, in addition to grant a lithium reservoir. The high reversibility of the system enables sustaining more than 10 000 cycles at elevated C‐rates (≈10C with respect to the LiFePO4 cathode), while retaining up to 85% of its initial capacity. |
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Keywords: | lithium‐ion batteries ZnFe2O4 LiFePO4 nanoparticles carbon nanotubes |
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