This study presents the application of magnetron sputtering for the conformal coating of lithium phosphorus oxynitride (LiPON) onto lithium-rich manganese oxide (LRM) materials, aiming to enhance their electrochemical performance through a cost-effective and time-efficient strategy. The LRM with approximately 0.058 % mass loading of LiPON coating (LRM-2) exhibited remarkable reversible capacities of 173.9 mAh/g and 192.5 mAh/g over 200 cycles at 25 °C and 60 °C, respectively, under 1 C charge/discharge current density. Comprehensive characterization studies revealed that LiPON modification significantly improved lithium ionic conductivity, interfacial ion transport kinetics, and interface compatibility with the electrolyte. The stable cathode-electrolyte interface effectively mitigated structural damage to LRM particles, suppressed interfacial oxygen release-induced phase transformation, and stabilized the material’s microstructures. Our sputtering-based conformal coating strategy is easily accessible and low-cost, with significant commercial application potential, offering a promising universal approach for enhancing the electrochemical performance of LRM cathode powder materials.

中文翻译：

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通过磁控溅射非晶 LiPON 保形涂层增强富锂锰氧化物的界面相容性和离子传输动力学


本研究介绍了磁控溅射在富锂锰氧化物（LRM）材料上对锂磷氮氧化物（LiPON）进行保形涂层的应用，旨在通过具有成本效益和时间效率的策略来增强其电化学性能。 LiPON 涂层质量负载量约为 0.058% 的 LRM（LRM-2）在 1 C 充电/放电条件下，在 25 °C 和 60 °C 下经过 200 次循环后分别表现出 173.9 mAh/g 和 192.5 mAh/g 的显着可逆容量当前密度。综合表征研究表明，LiPON 改性显着改善了锂离子电导率、界面离子传输动力学以及与电解质的界面相容性。稳定的阴极-电解质界面有效减轻了LRM颗粒的结构损伤，抑制了界面氧释放引起的相变，并稳定了材料的微观结构。我们基于溅射的保形涂层策略易于实现且成本低廉，具有巨大的商业应用潜力，为增强 LRM 阴极粉末材料的电化学性能提供了一种有前景的通用方法。