Battery Research
An important goal of electrochemical research is the development of advanced electrode materials for rechargeable high energy batteries with a high current density and a long cycle life. In lithium-ion batteries, manganese oxides like LiMnO2 and LiMn2O4 are widely used as positive electrodes. Doping these oxides with other metals like Co and Ni frequently leads to materials with improved electrochemical properties. Furthermore, other transition metal compounds like vanadium oxide nanotubes are being probed as electrode materials. For
the successful operation of Li-ion batteries, the formation of a
protective surface film on the carbonaceous anode materials is essential.
This solid electrolyte interphase (SEI) has also been discussed
for cathode materials such as LiMn2O4, LiCo2O4,
and LiNi2O4. For the first time, this film
was directly visualized by scanning electron microscopy. So-called
post mortem SEM analyses of the electrodes
are suitable to gain additional information. |
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Post
mortem SEM images of graphite (left) and LiMn2O4
(right) electrodes with the SEI layers marked by arrows. |
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Selected Publications Film
Formation at Positive Electrodes in Lithium-Ion Batteries Stabilisation
of Lithiated Graphite in an Electrolyte Based on Ionic Liquids:
an Electrochemical and Scanning Electron Microscopy Study Niobium(V) Oxynitride: Synthesis, Characterization, and Feasibility as Anode Material for Rechargeable Lithium-Ion Batteries Nanocomposite of Manganese Ferrocyanide and Graphene: A Promising Cathode Material for Rechargeable Lithium Ion Batteries New High Capacity Cathode Materials for Rechargeable Li-Ion Batteries: Vanadate-Borate Glasses
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modified: 13 April, 2022 by F. Krumeich | © ETH Zürich and the authors