Dresden 2017 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 22: Poster session I
MM 22.29: Poster
Montag, 20. März 2017, 19:00–20:00, P4
Characterization of different para-quinones as electrode materials in Li-ion batteries — •Christina Schmidt1, Yuquan Wu1, Sebastian Hahn2, Felix Hinkel2, and Rüdiger Klingeler1,2 — 1Kirchhoff Institute of Physics, Heidelberg University, Germany — 2Centre for Advanced Materials, Heidelberg University, Germany
The applicability of various para-quinones as electrode materials in lithium-ion batteries has been studied by means of cyclic voltammetry and galvanostatic cycling. The aza-para-quinones under study have been synthesized by classic condensation reactions with established procedures. Particular emphasis is given to the preparation of the solid electrodes and to the influence of the electrolyte. Our data imply that up to 3 Li+-ions per molecule can be stored electrochemically, which, in the example of 5,7,12,14-tetraaza-6,13-pentacenequinone (TAPQ), are associated with reversible redox reactions at potentials between 1.8 and 3.0 V vs. Li/Li+. Except for the first few cycles which show relatively high capacities above 300 mAh/g, the electrodes suffer from strong fading effects. No significant improvement of the cycling stability is observed when using different carbon additives or an ether-based electrolyte.