以聚丙烯腈(PAN)纤维为基材,添加纤维素纳米晶(CNCs),采用静电纺丝技术制备了PAN/CNCs复合纤维膜,经预氧化及碳化处理得到自支撑碳化纤维膜,用其作为负极材料组装成锂离子半电池,并测试了电池的电化学性能和充放电循环性能,分析了CNCs的添加和碳化温度对自支撑碳负极材料性能的影响。结果表明,PAN/CNCs自支撑碳负极材料与电解液浸润性良好,较纯PAN自支撑碳负极材料具有更优异的电化学性能和电池循环性能。
PAN/CNCs composite fiber film was prepared by electrospinning technology using polyacrylonitrile (PAN) fibers as substrate and adding cellulose nanocrystals (CNCs).After pre-oxidation and carbonization treatment,a self-supporting carbonized fiber film was obtained.The self-supporting carbon fiber film was used as the anode material to assemble a lithium-ion half battery,and the electrochemical performance and charge-discharge cycle performance of the battery were tested.The effects of the addition of CNCs and carbonization temperature on the properties of self-supporting carbon anode materials were analyzed.The results showed that PAN/CNCs self-supporting carbon anode material had good wettability with electrolyte,and had better electrochemical performance and battery cycle performance than pure PAN self-supporting carbon anode material.
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基金资助
北京市科技新星计划项目(20220484213);北京市优秀人才培养资助青年拔尖个人项目
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