Electrochemical behavior of LiNi1-y-zCoyMnzO2 probed through structural and magnetic properties
2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 111, no 2, 023904- p.Article in journal (Refereed) Published
We have investigated LixNi1-y-zCoyMnzO2 compounds with y = 1/3, 0.25, 0.2, 0.1 and z = 1/3, 0.2, 0.1, 0.05 in order to study the influence of Ni and Mn concentration, cationic disorder, and crystallite size on the magnetic and charge/discharge behavior. The samples have been studied by means of x-ray diffraction, scanning electron microscopy, voltammetry, cycling capacity, and magnetometry. The discharge capacity increases with increasing Ni concentration as does the number of ferromagnetic interactions. With higher Mn concentration a higher capacity is observed together with formation of strong antiferromagnetic interactions driving the magnetic frustration to lower temperatures. Our results show that for sufficiently low Co concentrations a stable and magnetically more ordered structure can be obtained with excellent electrochemical properties, although a relatively large amount of Ni is present.
Place, publisher, year, edition, pages
2012. Vol. 111, no 2, 023904- p.
Physical Sciences Engineering and Technology Inorganic Chemistry
Research subject Engineering Science with specialization in Solid State Physics; Chemistry with specialization in Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-169969DOI: 10.1063/1.3676434ISI: 000299792400049OAI: oai:DiVA.org:uu-169969DiVA: diva2:508359