LiFe2-xInxSbO 6 oxides as Li-ion electrode materials Xabier Martinez de Irujo Labalde 1, Suraj Mahato 1 ,Heather Grievson 2 , Samuel G Booth 2 , Michael Hayward 1 1 University of Oxford, UK, 2 The University of Sheffield, UK
Li-ion batteries have transformed daily life by acting as energy dense, rechargeable power sources for a wide range of electronic devices. As part of the UK Faraday Institute FutureCat project 1 we are investigating a range of new lithium-ion battery cathode materials for application in all-electric vehicles. In addition to the normal requirements of maximizing energy density and power output, as part of this project we are also trying to move away from cobalt-based materials due to their poor environmental impacts; we have focused on materials containing earth-abundant elements, with a particular emphasis on iron-based materials. Most of the iron, in particular, Fe 3+ materials, that have been investigated to-date suffer from a capacity loss after long term cycling, although a good performance can be achieved for the first cycle 2 . This capacity loss is generally attributed to the easy migration of Fe 3+ between different coordination sites. To get more insight into these issues, we are currently investigating a novel Fe-based system, LiFe2-xInxSbO 6 . In the present work, we have performed a detailed structural characterization of the different members of the solid solution, as well as their electrochemical properties. Additionally, We have performed Li intercalation procedures on these phases through different topochemical approaches to yield lithiated materials Based on these results, we will discuss the implications of partial substitution of Fe by In over the electrochemical performance of these Fe-based materials. References 1. https://futurecat.ac.uk/ 2. Li, J. L., Jianjun. Luo, Jing. Wang, Li. He, Xiangming., Recent advances in the LiFeO2-based materials for Li-ion batteries. Int. J. Electrochem. Sci. 2011, 6 , 1550-1561.
P56
© The Author(s), 2022
Made with FlippingBook Learn more on our blog