Rusman Erviani, Nulu Arunakumari, Sohn Keun Yong
Department of Nanoscience and Engineering, Inje University 197 Imje-ro Gimhae Gyeongnam-do 50834 Republic of Korea
RSC Adv. 2025 Aug 14;15(35):28841-28852. doi: 10.1039/d5ra02163d. eCollection 2025 Aug 11.
Germanium-based materials are emerging as promising anode candidates for lithium-ion batteries (LIBs) due to their high theoretical capacity, excellent electrical conductivity, and efficient lithium-ion diffusion at room temperature. However, their practical application is hindered by substantial volume changes during cycling, leading to poor cycling stability and diminished electrochemical performance. This study successfully created a GeO-Ge@NCNT composite using a cost-effective and environmentally friendly GeO precursor through a hydrothermal method. N-doped carbon nanotubes (NCNT) were utilized to enhance electrochemical activity by providing additional active sites and improving structural stability. The GeO-Ge@NCNT anode demonstrated remarkable cycling stability with a capacity of 1017 mA h g at a current density of 100 mA g after 100 cycles, maintaining a coulombic efficiency of 98.15% and a capacity retention of 71.15% ( 2 cycle discharge capacity). Moreover, C-rate analysis showed exceptional rate capability and consistent long-term cycling performance. This research presents a sustainable and scalable method for producing high-performance Ge-based anodes for next-generation lithium-ion battery technologies.
锗基材料因其高理论容量、优异的导电性以及在室温下高效的锂离子扩散性能，正成为锂离子电池（LIBs）颇具前景的负极候选材料。然而，其实际应用受到循环过程中大量体积变化的阻碍，导致循环稳定性差和电化学性能下降。本研究通过水热法，使用具有成本效益且环境友好的GeO前驱体成功制备了GeO-Ge@NCNT复合材料。利用氮掺杂碳纳米管（NCNT）通过提供额外的活性位点和改善结构稳定性来增强电化学活性。GeO-Ge@NCNT负极在100次循环后，在100 mA g的电流密度下表现出显著的循环稳定性，容量为1017 mA h g，库仑效率保持在98.15%，容量保持率为71.15%（相对于第2次循环放电容量）。此外，倍率性能分析显示出优异的倍率能力和持续的长期循环性能。本研究提出了一种可持续且可扩展的方法，用于生产下一代锂离子电池技术的高性能锗基负极。
