Nanocomposites and nanomaterials
Synthesis of core/shall LiNi1/3Co1/3Mn1/3O2/Li1.3Al0.3Ti1.7(PO4)3 cathode materials for Li-ion batteries
Demchuk D.1, Kobylianska S.2, Khomenko V.1, Barsukov V.1, Belous А.2 
1 Department of electrochemical power engineering & chemistry, Kyiv National University of Technologies and Design, Nemyrovycha-Danchenka St 2, Kyiv- 01011, Ukraine. 
E-mail: xarond13@gmail.com 
2 Solid State Chemistry Department, Institute of General and Inorganic Chemistry, National Academy of Sciences of Ukraine, Palladina ave., 32/34, Kyiv-03680, Ukraine..

Nowadays, lithium-ion batteries are the most advanced type of power sources, which are using in many devices. Layered manganese-cobalt-nickel-lithium oxides LiNi1-x-yCoxMnyO2 has been considered as a better replacement for LiCoO2 due to its lower cost, lower toxicity and better electrochemical performance such as higher reversible capacity. However, these materials still suffer from some technical challenges, as the undesired interfacial reactions between NCM and electrolyte. To prevent the interfacial side reactions, researchers have attempted to coat the NMC with chemically stable and electrochemically inert materials such as FePO4, Al2O3, AlPO4 [1]. Titanium-aluminum-lithium phosphate Li1,3Al0.3Ti1.7(PO4)3 (LATP) is a solid electrolyte which exhibits one of the highest conductivity (~ 10-3-10 -5 Sm/cm at 20°C) and is chemically stable. Therefore, the aim of this study is synthesis and investigation of composite cathodes based on core/shall structures.
Nanoparticles of LATP have been synthesized via the sol–gel method using metal nitrates and alkoxides. It has been shown that the crystallization of NASICON phases was produced at 750◦C. The mean crystallite particle size was between 10–20 nm. Core/shall structures NCM/LATP have been obtained by homogenization of commercial NCM (MTI corporation) and nanoparticles of LATP in different proportions in cyclohexane during 48 hours, then samples were heated at 800°C. Morphology, particle size, phase composition have been studied with SEM, XRD, EDX methods. Electrochemical measurements of composite cathodes have been investigated. The dependence of the electrochemical properties on the amount of LATP have been investigated. 

1.	Li X., Zhao X., Wang M.-S. et al. Improved rate capability of a LiNi1/3Co1/3Mn1/3O2/CNT/graphene hybrid material for Li-ion batteries // RSC Adv.-2017.-7.P. 24359-24367.