Volume 32, Issue 12 p. 3159-3169
Full Paper

Influence of Microwave Irradiation and Combustion Fuels on the Rate Capability and Cycle Performance of Li1.2Mn0.52Ni0.13Co0.13Al0.02O2 Layered Material

Funeka Nkosi

Corresponding Author

Funeka Nkosi

Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa

Energy Centre, Council for Scientific and Industrial Research (CSIR), Pretoria, 0001 South Africa

Search for more papers by this author
Nithyadharseni Palaniyandy

Nithyadharseni Palaniyandy

Energy Centre, Council for Scientific and Industrial Research (CSIR), Pretoria, 0001 South Africa

Search for more papers by this author
Kumar Raju

Kumar Raju

Energy Centre, Council for Scientific and Industrial Research (CSIR), Pretoria, 0001 South Africa

Search for more papers by this author
Kenneth I. Ozoemena

Kenneth I. Ozoemena

Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa

Search for more papers by this author
First published: 23 October 2020

Abstract

Commercialization of lithium-manganese rich oxides (LMR-NMC) cathodes for lithium-ion batteries is hindered by shortcomings such as severe capacity fade and poor rate capability. This work reveals the synergetic effect of the structure and morphology in reducing capacity fade and improving rate capability in Li1.2Mn0.52Ni0.13Co0.13Al0.02O2 (LMNCA) cathode. The results show that the hybrid microwave irradiation-combustion synthesis results in smaller particles, increased lattice parameters, reduced transition metal oxidation states, and high Li-ion diffusion coefficients. These resulted in powders with reduced capacity fade and enhanced rate performance. LMNCA urea-mic exhibited the best electrochemical performance with a discharge capacity of 360 mAh/g and capacity retention of 88 % after 50 cycles at 0.1 C.

Data Availability Statement

The data supporting the findings of this study are available in the supporting information file of this article.