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Biomimetic Straw-Like Bundle Cobalt-Doped Fe O Electrodes towards Superior Lithium-Ion Storage.

07:00 EST 5th February 2019 | BioPortfolio

Summary of "Biomimetic Straw-Like Bundle Cobalt-Doped Fe O Electrodes towards Superior Lithium-Ion Storage."

Biomimetic straw-like bundles of Co-doped Fe O (SCF), with Co incorporated into the lattice of α-Fe O , was fabricated through a cost-effective hydrothermal process and used as the anode material for lithium-ion batteries (LIBs). The SCF exhibited ultrahigh initial discharge specific capacity (1760.7 mA h  g at 200 mA g ) and cycling stability (with the capacity retention of 1268.3 mA h  g after 350 cycles at 200 mA g ). In addition, a superior rate capacity of 376.1 mA h  g was obtained at a high current density of 4000 mA g . The remarkable electrochemical lithium storage of SCF is attributed to the Co-doping, which increases the unit cell volume and affects the whole structure. It makes the Li insertion-extraction process more flexible. Meanwhile, the distinctive straw-like bundle structure can accelerate Li ion diffusion and alleviate the huge volume expansion upon cycling.

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Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
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