Issue 11, 2024

Facile preparation of Hf3N4 thin films directly used as electrodes for lithium-ion storage

Abstract

Transition-metal nitride thin-film electrodes are potential electrode materials for all-solid-state thin-film lithium-ion batteries. In this study, orthorhombic Hf3N4 thin-film electrodes applied in lithium-ion batteries were fabricated by the magnetron sputtering deposition of Hf followed by N2 plasma immersion and post-annealing for the first time. This electrode material without additives such as binders and conductive agents exhibited a high specific capacity, high cycling stability, and excellent rate performance. At a current density of 0.1 A g−1, the initial discharge capacity was 583.2 mA h g−1 and the stable Coulombic efficiency was 96.6%. At a high current density of 2 A g−1, the Hf3N4 thin-film electrodes could still provide a stable discharge capacity of about 260 mA h g−1 and Coulombic efficiency close to 100%. By analyzing the cyclic voltammetry curves at different scan rates, it was found that the Li+ storage in Hf3N4 thin-film electrodes was mainly contributed by a pseudo-capacitance mechanism.

Graphical abstract: Facile preparation of Hf3N4 thin films directly used as electrodes for lithium-ion storage

Supplementary files

Article information

Article type
Communication
Submitted
14 Aug 2024
Accepted
29 Aug 2024
First published
30 Aug 2024

Nanoscale Horiz., 2024,9, 2031-2041

Facile preparation of Hf3N4 thin films directly used as electrodes for lithium-ion storage

Z. Shi, G. Yu, J. Li, Z. Jia, X. Zhang, C. Lin, Q. Lin, Z. Chen and H. Tsai, Nanoscale Horiz., 2024, 9, 2031 DOI: 10.1039/D4NH00406J

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