石墨烯
材料科学
电极
复合数
磷酸铁锂
电解质
复合材料
纤维素
锂(药物)
分离器(采油)
极化(电化学)
化学工程
纳米技术
电化学
化学
物理
工程类
内分泌学
物理化学
热力学
医学
作者
Yan Wang,Zhenyu He,Yao-xuan Wang,Cong Fan,Chen-Ren-Lang Liu,Qiling Peng,Jin‐Ju Chen,Zhe-sheng Feng
标识
DOI:10.1016/j.jcis.2017.10.042
摘要
In this work, a free-standing flexible composite electrode was prepared by vacuum filtration method with LiFePO4, graphene and nanofibrillated cellulose (NFC). Compared with the pure LiFePO4 electrode, the resulting flexible composite (LiFePO4/graphene/NFC) electrode showed excellent mechanical flexibility, and possessed an enhanced initial discharge capacity of 151 mA h/g (0.1 C) and a good capacity retention rate with only 5% loss after 60 cycles due to suitable electrolyte wettability at the interface. Furthermore, the NFC and graphene formed a three-dimensional conductive framework, which provided high-speed electron conduction in the composite and reduced electrode polarization during charging-discharging processes. Moreover, the composite electrode could endure bending tests up to 1000 times, highlighting preferable mechanical strength and durability. These results demonstrated that the as-fabricated electrodes could be applied as flexible electrodes with an embedded power supply.
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