包覆型Fe_(2)O_(3)@rGO负极材料的可控制备及其锂离子电池性能研究  

Controllable preparation of wrapped Fe_(2)O_(3)@rGO composites and their lithium ion storage performance

作　　者：齐慧 王睿 王文静[2] 韩红斐[1] 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)

机构地区：[1]太原师范学院化学与材料学院,山西晋中030619 [2]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《燃料化学学报（中英文）》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。

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.

关 键 词：Fe_(2)O_(3) 空心球 还原氧化石墨烯 负极材料 锂离子电池 

分 类 号：O646.2[理学—物理化学]