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Lithium storage in perovskite lithium lanthanum titanate

Institution:	1. Materials Research Centre, Department of Physics, N.G.M.College, Pollachi, Coimbatore 642 001, India;2. Department of Physics, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore 641 043, India;1. Centro NanoMat/Cryssmat Lab/Física – DETEMA, Facultad de Química, Universidad de la República, Uruguay;2. Centro Interdisciplinario de Nanotecnología, Química y Física de Materiales, Espacio Interdisciplinario, Universidad de la República, Uruguay;1. School of Metallurgy, Northeastern University, Shenyang 110819, China;2. Liaoning Key Laboratory for Metallurgical Sensor and Technology, Shenyang 110819, China;3. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China;4. Jiangsu Lithitech Co. Ltd, Changzhou 213000, China

Abstract:	Perovskite lithium lanthanum titanate (LLTO) was synthesized using sol–gel method. It shows a reversible capacity of 145 mA h g^− 1 and moderate cycling performance between 0.01 and 2.00 V. Cyclic voltammetry and X-ray diffraction results demonstrate a two-step solid–solution reaction behavior in the voltage range of 0.00–3.00 V upon lithium insertion/extraction. A stable solid electrolyte interphase (SEI) layer is formed on the surface of LLTO after the initial discharge. Carbon coating by chemical vapor deposition improves its cycling performance significantly.

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