Title: A novel cathodic composite in lithium ion battery based on LiNi_0.7Co_0.3O₂, Li₂MnO₃, and LiCoO₂ combination: synthesis and characterisation

Authors: Thu Thi Pham; Fatemeh Mollaamin; Majid Monajjemi; Afshar Alihosseini; Amin Hedayati Moghaddam; Chien Mau Dang

Addresses: Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam ' Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, 009821, Iran ' Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, 009821, Iran ' Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, 009821, Iran ' Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam

Abstract: Various composites including (1-x-y) LiNi_0.7Co_0.3O₂, xLi₂MnO₃ and yLiCoO₂ systems were synthesised using the sol-gel method. Stoichiometric weights of the LiNO₃, Mn(Ac)₂·4H₂O, Co(Ac)₂·4H₂O, Ni(NO₃)₂·6H₂O for preparing of 28 samples have been used. We found that the sample "Li_1.167Ni_0.117Co_0.699Al_0.017Mn_0.167O₂" with Al doped is the best composition for cathode material in LIBTs. Obviously, the weight of cobalt used in this sample is lower compared to LiCoO₂ which is an advantage in view point of cost and toxicity. Charge-discharge characteristics of the mentioned cathode materials were investigated by performing cycle tests in the range of 2.4-4.6 V. Our results confirmed that this kind of system can help removing the mentioned disadvantage of cobalt with high efficiency.

Keywords: lithium ion battery; LiCoO₂; Li₂MnO₃; sol-gel method; Li_1.167Ni_0.116Co_0.717Mn_0.167O₂; [(1-x-y)LiNi_0.7Co_0.3O₂]; stoichiometric weights; mole-fractions.

DOI: 10.1504/IJNT.2020.111326

International Journal of Nanotechnology, 2020 Vol.17 No.7/8/9/10, pp.560 - 572

Published online: 20 Nov 2020 *

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