气凝胶
石墨烯
材料科学
复合数
锂(药物)
多孔性
电解质
棒
化学工程
纳米技术
电极
复合材料
化学
物理化学
病理
内分泌学
替代医学
工程类
医学
作者
Xiaohui Tian,Zhonghua Chen,Yong Zhu,Xumin Huang,Guan Wu,Yingke Zhou
标识
DOI:10.1016/j.jallcom.2019.151913
摘要
The three-dimensional (3D) graphene aerogel (GA)-wrapped LiFePO4 submicron-rod composite ([email protected]) has been prepared successfully through a solvothermal method followed with rapid freeze-drying. Monodispersed LiFePO4 submicron-rods are well-enwrapped with the graphene sheets and which further form a highly porous and conductive 3D structure, leading to the overall rapid electron transport of the composite electrode and affording many interwoven pores for fast supply of Li+ and storage of electrolyte. Moreover, the combination of the rod-shaped LFP and porous 3D structure can effectively relieve the stress resulted from the structural change during the insertion/deinsertion of Li+. Owing to these particular structure and characteristics, the [email protected] composite presents a high discharge capacity (162.7 mAh g−1 at 0.1 C), a remarkable rate capacity (119.9 mAh g−1 at 5 C) and an excellent long-term cycle stability after 1000 cycles at 1 C (86.5% capacity retention), which is potential for use in Li-ion batteries.
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