A facile coprecipitation approach for synthesizing LaNi0.5Co0.5O3 as the cathode for a molten-salt lithium–oxygen battery

Qianyuan Qiu; Jiaqi Wang; Penghui Yao; Yongdan Li

doi:10.1039/D3FD00078H

A facile coprecipitation approach for synthesizing LaNi_0.5Co_0.5O₃ as the cathode for a molten-salt lithium–oxygen battery†

Qianyuan Qiu,

^a Jiaqi Wang,^ab Penghui Yao^a and Yongdan Li

*^a

Author affiliations

* Corresponding authors

^a Department of Chemical and Metallurgical Engineering, Aalto University, Kemistintie 1, FI-00076 Aalto, Finland
E-mail: yongdan.li@aalto.fi

^b Flexible Printed Electronic Technology Center and State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China

Abstract

The cathode of a lithium–oxygen battery (LOB) should be well designed to deliver high catalytic activity and long stability, and to provide sufficient space for accommodating the discharge product. Herein, a facile coprecipitation approach is employed to synthesize LaNi_0.5Co_0.5O₃ (LNCO) perovskite oxide with a low annealing temperature. The assembled LOB exhibits superior electrochemical performance with a low charge overpotential of 0.03–0.05 V in the current density range of 0.1–0.5 mA cm⁻². The battery ran stably for 119 cycles at a high coulombic efficiency. The superior performance is ascribed to (i) the high catalytic activity of LNCO towards oxygen reduction/evolution reactions; (ii) the increased temperature enabling fast kinetics; and (iii) the LiNO₃–KNO₃ molten salt enhancing the stability of the LOB operating at high temperature.

This article is part of the themed collection: Rechargeable non-aqueous metal-oxygen batteries

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Article information

DOI: https://doi.org/10.1039/D3FD00078H
Article type: Paper
Submitted: 19 Apr 2023
Accepted: 19 Jun 2023
First published: 19 Jun 2023
This article is Open Access

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Faraday Discuss., 2024,248, 327-340

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A facile coprecipitation approach for synthesizing LaNi_0.5Co_0.5O₃ as the cathode for a molten-salt lithium–oxygen battery

Q. Qiu, J. Wang, P. Yao and Y. Li, Faraday Discuss., 2024, 248, 327 DOI: 10.1039/D3FD00078H

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