Anna Milewska
AGH University of Science and Technology
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Publication
Featured researches published by Anna Milewska.
Materials | 2013
Janina Molenda; Andrzej Kulka; Anna Milewska; Wojciech Zając; Konrad Świerczek
LiFePO4 is considered to be one of the most promising cathode materials for lithium ion batteries for electric vehicle (EV) application. However, there are still a number of unsolved issues regarding the influence of Li and Fe-site substitution on the physicochemical properties of LiFePO4. This is a review-type article, presenting results of our group, related to the possibility of the chemical modification of phosphoolivine by introduction of cation dopants in Li and Fe sublattices. Along with a synthetic review of previous papers, a large number of new results are included. The possibility of substitution of Li+ by Al3+, Zr4+, W6+ and its influence on the physicochemical properties of LiFePO4 was investigated by means of XRD, SEM/EDS, electrical conductivity and Seebeck coefficient measurements. The range of solid solution formation in Li1−3xAlxFePO4, Li1−4xZrxFePO4 and Li1−6xWxFePO4 materials was found to be very narrow. Transport properties of the synthesized materials were found to be rather weakly dependent on the chemical composition. The battery performance of selected olivines was tested by cyclic voltammetry (CV). In the case of LiFe1−yMyPO4 (M = Mn, Co and Ni), solid solution formation was observed over a large range of y (0 < y ≤ 1). An increase of electrical conductivity for the substitution level y = 0.25 was observed. Electrons of 3d metals other than iron do not contribute to the electrical properties of LiFe1−yMyPO4, and substitution level y > 0.25 leads to considerably lower values of σ. The activated character of electrical conductivity with a rather weak temperature dependence of the Seebeck coefficient suggests a small polaron-type conduction mechanism. The electrochemical properties of LiFe1−yMyPO4 strongly depend on the Fe substitution level.
Functional Materials Letters | 2011
Anna Milewska; Janina Molenda
Structural and transport properties of pristine LixNi1-y-zCoyMnzO2 (y = 0.25, 0.35, 0.5, 0.6; z = 0.1, 0.2) and LiNi0.63Cu0.02Co0.25Mn0.1O2 materials are presented. Among LiNi1-y-zCoyMnzO2 pristine oxides, LiNi0.65Co0.25Mn0.1O2 presents the best transport properties. Strong decrease of electrical conductivity of LixNi0.65Co0.25Mn0.1O2 and LixNi0.55Co0.35Mn0.1O2 compositions upon lithium deintercalation was observed. Cu doping in LiNi0.63Cu0.02Co0.25Mn0.1O2 improves the transport properties during deintercalation process. LixNi0.65Co0.25Mn0.1O2 and LixNi0.63Cu0.02Co0.25Mn0.1O2 retain structural stability up to xLi = 0.35 mol.
Solid State Ionics | 2014
Anna Milewska; Konrad Świerczek; J. Tobola; Florent Boudoire; Yelin Hu; Debajeet K. Bora; B.S. Mun; Artur Braun; Janina Molenda
Solid State Ionics | 2011
Anna Milewska; Marcin Molenda; Janina Molenda
Solid State Ionics | 2013
Marcin Molenda; Michał Świętosławski; Anna Milewska; Małgorzata M. Zaitz; A. Chojnacka; Barbara Dudek; R. Dziembaj
Solid State Ionics | 2015
Janina Molenda; Dominika Baster; Anna Milewska; Konrad Świerczek; Debajeet K. Bora; Artur Braun; J. Tobola
Solid State Ionics | 2012
Andrzej Kulka; Anna Milewska; Wojciech Zając; Konrad Świerczek; Emil Hanc; Janina Molenda
Journal of Power Sources | 2009
Janina Molenda; Anna Milewska
Journal of Power Sources | 2013
Andrzej Kulka; Dominika Baster; Michał Dudek; Michał Kiełbasa; Anna Milewska; Wojciech Zając; Konrad Świerczek; Janina Molenda
Solid State Ionics | 2014
Anna Milewska; Łukasz Kondracki; Marcin Molenda; Monika Bakierska; Janina Molenda
Collaboration
Dive into the Anna Milewska's collaboration.
Swiss Federal Laboratories for Materials Science and Technology
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