摘要
本研究通过溶剂热法成功制备还原氧化石墨烯包覆Fe_(2)O_(3)空心球复合物(Fe_(2)O_(3)@rGO),并对其结构和性能进行了表征和测试。结果表明,包覆型Fe_(2)O_(3)@rGO负极材料由于内部存在大量的Fe-O-C键,明显提升了电子传输速率,同时石墨烯的物理限域显著降低了电极材料的粉化速率,因此,包覆型Fe_(2)O_(3)@rGO电极材料表现出优异的倍率性能(在大电流5 A/g下具有514 mA·h/g的可逆容量)和长循环寿命(在0.5 A/g下循环500圈后,容量保持987 mA·h/g,保持率为81.1%)。此项工作为制备高倍率、长寿命的石墨烯复合负极材料提供了一种有效策略。
In this paper,reduced graphene oxides wrapped hollow Fe_(2)O_(3)spheres(Fe_(2)O_(3)@rGO)were successfully prepared by solvothermal method.Results show that plenty of Fe−O−C bonds between reduced graphene oxides and Fe_(2)O_(3)significantly improved electron transfer rate of the composite anodes,and confinement effect of reduced graphene oxides slowed the pulverization rate of Fe_(2)O_(3)during charge/discharge process.As expected,wrapped structured Fe_(2)O_(3)@rGO anode exhibited high rate capability of 514 mA·h/g at high current of 5.0 A/g and durable cycling life over 500 cycles with a capacity of 987 mA·h/g under 0.5 A/g with a capacity retention of 81.1%.This work provides an effective strategy for the preparation of high-rate and long-life graphene composite anode materials.
作者
齐慧
王睿
王文静
韩红斐
QI Hui;WANG Rui;WANG Wen-jing;HAN Hong-fei(College of Chemistry and Materials,Taiyuan Normal University,Jinzhong 030619,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《燃料化学学报（中英文）》
EI
CAS
CSCD
北大核心
2023年第10期1478-1486,共9页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(52002305)
蛋白质基功能材料实验室(2022P010)资助。
