RF Sputtered In-plane NiO-based Lithium-metal Microbattery

Tleukenov Y.-T. Yegamkulov M. Raiymbekov Y. Nurpeissova A. Bakenov Z. Mukanova A.
2024 L.N. Gumilyov Eurasian National University

Eurasian Journal of Physics and Functional Materials
2024 #8 Issue 3 111 - 121 pp.

The goal to further increase energy and power density of conventional two-dimensional (2D) structured lithium-ion batteries (LIBs) is driving research towards more complex three-dimensional (3D) batteries with large surface area and accordingly high active material mass loading. So far, many attempts have been implemented to prepare 3D structured LIBs. A highly developed 3D surface allows for a larger amount of active material to be deposited while maintaining a smaller thickness, thus avoiding the challenges associated with a thick electrode. Herein, this paper presents development of in-plane type 3D NiO thin film electrodes produced by radio frequency (RF) magnetron sputtering. The physico- and electro-chemical properties were studied depending on the post-annealing temperature which was in the range of 200e300 _C. It was shown that an in-plane NiO thin film anode with GPE can be developed to enable battery operation without the use of a commercial separator. As a gel-polymer electrolyte (GPE) was used poly(ethylene oxide)-poly(vinylidene fluoride) (PEO-PVDF-co-HFP). The in-plane 3D battery with PEO-PVDF-co-HFP GPE exhibited outstanding cycling stability of 60 cycles, delivering a capacity of 510 mAh g¡1. The developed 3D battery, as a result, demonstrated improved cycling stability and electrochemical performance while effectively operating at 0.1C rate.

3D , Gel polymer electrolyte (GPE) , In-plane , Lithium-metal , Microbattery , Nickel oxide (NiO) , Sputtering , Thin film

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National Laboratory Astana, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Institute of Batteries LLC, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan

National Laboratory Astana
Institute of Batteries LLC
Department of Chemical and Materials Engineering

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