Events

Past events

MAR 02 2018

CIC energiGUNE's seminar "Co-free cathode materials for high-energy LiBs”

Speaker: Dr. Marilena Mancini

From: Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), Ulm, Germany

The future generation of high energy density Li-ion batteries is strongly dependent on the development of safe and cheap cathode materials with either higher capacity and/or higher working potential than currently used active materials. The cost of the raw materials can be reduced by replacing expensive transition metals like cobalt, with more abundant and less toxic elements in the cathode composition. In this presentation different classes of Co-free cathode materials will be presented, including polyanion-type compounds and Li-rich nickel-manganese oxide. Practical applications in Li-ion cells of a highly ordered, stoichiometric LiNi0.5Mn1.5O4 spinel with spherical morphology and high density will be presented. Crystallite size, inter-crystallite contacts, porosity and size of the particles were controlled in order to achieve high electrochemical performance both high-voltage and high-energy applications. Moreover, a series of Li-rich structures with composition Li1+xNi0.5Mn1.5O4 (0<x<1) obtained by chemical method and showing very promising electrochemical performance in both half and full Li cells will be presented. The presented approach allows obtaining Co-free cathode materials with high-energy and high cycling stability and overcoming practical limitations related to commonly reported electrochemical pre-lithiation of the cathode before assembly full-cells.

Material challenges, electrochemical performances and feasibility for practical applications will be discussed. 

Ending data: 03.02.2018
  • Place: CIC energiGUNE, Seminar room , 13:00
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