Choi Yusong, Ahn Tae-Young, Ha Sang-Hyeon, Kang Hyungu, Ahn Won Jun, Lee Jae-In, Yoo Eun-Ji, Yeo Jae-Seong
Defense Materials and Energy Development Center, Agency for Defense Development Yuseong P. O. Box 35 Daejeon 34060 Korea.
Department of Defense System Engineering, University of Science and Technology Daejeon 34113 Korea
RSC Adv. 2025 Mar 20;15(11):8622-8629. doi: 10.1039/d5ra00411j. eCollection 2025 Mar 17.
Various lithium-infused metal anodes based on pure nickel foam, recognised for their superior properties, have been developed for application in lithium batteries. However, pure nickel foam exhibits significant reactivity with molten lithium during the infusion processes, such as coating and impregnation. In this study, a high-performance and ultra-stable lithium-infused metal anode (LI-NAFA) is synthesised through a simple oxidation treatment of nickel-chromium-aluminium (Ni-Cr-Al) alloy foam (NAF) at 900 °C in an air atmosphere. This approach effectively mitigates the material's reactivity with molten lithium, thereby enhancing the stability of the resulting anode. A layer of several hundred nanometers is generated, which converts the NAF surface from lithiophobic to lithiophilic. Additionally, the layers formed during oxidation enhance the molten lithium stability. A full cell test employing LI-NAFA showed stability during the molten lithium infusion and cycle performance. A full cell with pure lithium was also tested for comparison. The notable enhancement in performance can be ascribed to the excellent electrical conductivity of the NAF and improved cycling stability of lithium ions facilitated by uniform charge distribution. Following cell discharge, the LI-NAFA showed no formation of lithium dendrites and a reduction in dead lithium. LI-NAFA holds great potential for developing high-performance lithium metal batteries because of its favourable fabrication process and excellent cycling stability.
基于纯泡沫镍的各种锂注入金属阳极，因其优异性能而受到认可，已被开发用于锂电池。然而，在注入过程（如涂层和浸渍）中，纯泡沫镍与熔融锂表现出显著的反应性。在本研究中，通过在900℃的空气气氛中对镍铬铝（Ni-Cr-Al）合金泡沫（NAF）进行简单的氧化处理，合成了一种高性能且超稳定的锂注入金属阳极（LI-NAFA）。这种方法有效地降低了材料与熔融锂的反应性，从而提高了所得阳极的稳定性。生成了一层几百纳米厚的层，该层将NAF表面从憎锂性转变为亲锂性。此外，氧化过程中形成的层增强了熔融锂的稳定性。采用LI-NAFA的全电池测试显示在熔融锂注入和循环性能方面具有稳定性。还测试了使用纯锂的全电池以作比较。性能的显著提高可归因于NAF优异的导电性以及均匀电荷分布促进的锂离子循环稳定性的改善。电池放电后，LI-NAFA未形成锂枝晶且死锂减少。由于其良好的制造工艺和优异的循环稳定性，LI-NAFA在开发高性能锂金属电池方面具有巨大潜力。
