Facile synthesis of Li2MoO4 coated LiNi1/3Co1/3Mn1/3O2 composite as a novel cathode for high-temperature lithium batteries

• Published in: Ionics 2020-04, Vol.26 (4), p.1617-1627
• Main Authors: Ren, Xiaoying, Du, Junlin, Pu, Zhaohui, Wang, Runbo, Gan, Liao, Wu, Zhu
• Format: Article
• Language: English
• Subjects: Cathodes; Chemistry; Chemistry and Materials Science; Coating; Condensed Matter Physics; Electrochemical analysis; Electrochemistry; Electrode materials; Energy Storage; High temperature; Ion transport; Lithium; Lithium batteries; Lithium ions; Molybdenum oxides; Molybdenum trioxide; Optical and Electronic Materials; Original Paper; Reaction kinetics; Renewable and Green Energy; Residues
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-020-03474-z

High-temperature lithium battery system operated between 150 and 300 °C is highly desirable to be applied in oil/gas and geothermal explorations. However, the development of cathode material for high-temperature lithium batteries is relatively sluggish. In this study, LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) is coated with Li 2 MoO 4 by a facile solid-state reaction between MoO 3 and surface lithium residue and the resulting composite is applied in high-temperature lithium batteries as a novel cathode material. Such a strategy can not only remove lithium residue components, but also facilitate lithium-ion transport in NCM through the resulting Li 2 MoO 4 coating layer. At 200 °C, the discharge capacity and rate capacity of Li 2 MoO 4 coated NCM are dramatically improved compared to the pristine one. At 300 °C, the electrochemical performance of 4m-NCM is better than other samples, and each sample exhibits better electrochemical performances than it is at 200 °C due to the enhanced kinetics in high temperature.