中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 12 December 2025 |
（1. State Key Laboratory of Physical Chemistry of Solid Surface, College of Materials, Xiamen University, Xiamen 361005, China;
2. Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, China）
Abstract:Spinel LiNi0.5Mn1.5O4 (LNMO) cathode draws significant attention in the field of energy storage due to its unique voltage plateau. To further enhance the long-term electrochemical stability of LNMO, the LNMO cathode covered with an ultrathin ZrO2 layer was prepared through atomic layer deposition (ALD). It is found that the LNMO cathode deposited with 20 layers of ZrO2 (LNMOZ20) exhibits the best electrochemical performance, achieving a high discharge capacity of 117.1 mA·h/g, with a capacity retention of 87.4% after 600 cycles at a current density of 1C. Furthermore, even at higher current densities of 5C and 10C, the LNMOZ20 electrode still demonstrates excellent stability with discharge capacities reaching 111.7 and 103.6 mA·h/g, and capacity retentions maintaining at 81.0% and 101.4% after 2000 cycles, respectively. This study highlights that the incorporation of an ultrathin ZrO2 layer by ALD is an effective strategy for enhancing the long-term cycling stability of LNMO cathodes.
Key words: spinel LiNi0.5Mn1.5O4; ZrO2 coating; high-voltage cathode; atomic layer deposition; cathode electrolyte interphase film
