Seong Honggyu, Jung Taejung, Kim Sanghyeon, Choi Jaewon
Department of Chemistry and Research Institute of Molecular Alchemy, Gyeongsang National University, Jinju 52828, Republic of Korea.
Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Materials (Basel). 2024 Oct 17;17(20):5059. doi: 10.3390/ma17205059.
To address the rapidly growing demand for high performance of lithium-ion batteries (LIBs), the development of high-capacity anode materials should focus on the practical perspective of a facile synthetic process. In this work, iron oxide nanoparticles (FeO NPs) in situ grown on the surface of reduced graphene oxide (rGO), denoted as FeO NPs@rGO, were prepared through a facile one-pot synthesis under the wet-colloidal conditions. The synthesized FeO NPs showed that uniform FeO NPs, with a size of around 9 nm, were distributed on the rGO surfaces. When applied as an anode material for LIBs, the FeO NPs@rGO anode revealed a high reversible capacity of 1191 mAh g at 1.0 A g after 200 cycles. It also exhibited excellent rate performance, achieving 608 mAh g at a current density of 5.0 A g over 500 cycles, with improved electronic and ionic conductivities due to the rGO template. This suggested that practically available anode materials can be developed through our one-pot synthesis by in situ growing the FeO NPs.
为满足对锂离子电池（LIBs）高性能迅速增长的需求，高容量负极材料的开发应从简便合成工艺的实际角度出发。在本工作中，通过湿胶体条件下简便的一锅法合成，制备了原位生长在还原氧化石墨烯（rGO）表面的氧化铁纳米颗粒（FeO NPs），记为FeO NPs@rGO。合成的FeO NPs显示出尺寸约为9 nm的均匀FeO NPs分布在rGO表面。当用作LIBs的负极材料时，FeO NPs@rGO负极在200次循环后，在1.0 A g下显示出1191 mAh g的高可逆容量。它还表现出优异的倍率性能，在5.0 A g的电流密度下经过500次循环达到608 mAh g，由于rGO模板，电子和离子传导率得到改善。这表明通过我们的一锅法原位生长FeO NPs可以开发出实际可用的负极材料。
