Dresden 2017 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 22: Poster session I
MM 22.28: Poster
Monday, March 20, 2017, 19:00–20:00, P4
Ferrite filled carbon nanotubes vs. ferrite nanoparticles as anode materials for lithium ion batteries — •Lucas Möller1, Alexander Ottmann1, Rüdiger Klingeler1,2, Rasha Ghunaim3, and Silke Hampel3 — 1Kirchhoff Institute of Physics, Heidelberg University — 2Centre for Advanced Materials, Heidelberg University — 3Leibniz Institute for Solid State and Materials Research (IFW) Dresden
Various nanosized ferrite MFe2O4 (M = Fe, Co, Ni) materials incorporated into multiwalled carbon nanotubes (CNT) have been studied as anode materials for Li-ion batteries. Electrochemical measurements by means of cyclic voltammetry (CV) and galvanostatic cycling with potential limitation (GCPL) were carried out in Swagelok-type two-electrode cells against Li/Li+. In order to evaluate the benefits of the CNT shells, the results are compared to pristine ferrite MFe2O4 nanoparticles. The CVs show typical redox activity associated with the conversion reaction MFe2O4 + 8Li+ + 8e− ↔ M + 2Fe + 4Li2O. For the functionalised nanotubes, the data show in addition signatures of Li de-/intercalation into the CNTs. GCPL measurements reveal better cycling stability of the CNT-incorporated compared to the pristine ferrite nanoparticles.