Flexible phosphorus doped carbon nanosheets/nanofibers: Electrospun preparation and enhanced Li-storage properties as free-standing anodes for lithium ion batteries
Flexible phosphorus doped carbon nanosheets/nanofibers: Electrospun preparation and enhanced Li-storage properties as free-standing anodes for lithium ion batteries
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柔性磷掺杂碳纳米片/纳米纤维：静电纺丝制备和增强锂离子电池独立阳极的储锂性能
DOI：
10.1016/j.jpowsour.2018.02.069
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发表时间：
2018-04-30
影响因子：
9.2
通讯作者：
Huang, Wei
中科院分区：
文献类型：
--
作者：
Li, Desheng;Wang, Dongya;Huang, Wei
新兴的可穿戴和可折叠电子设备推动了柔性锂离子电池（LIB）的发展。碳材料因其重量轻、成本低和抗重复变形良好的结构稳定性而被认为是最有前途的锂离子电池电极材料之一。然而，其比容量、倍率性能和长期循环性能仍需要提高，以适应下一代锂离子电池的应用。在此，我们报告了一种将磷固定到用于锂离子电池的大面积碳纳米片/纳米纤维交织的独立纸中的简便方法。作为锂离子电池负极材料，它在200 mA g(-1)的电流密度下表现出1100 mAh g(-1)的高可逆容量，以及优异的倍率性能（例如，20,000 mA g(-1)时为200 mAh g(-1)）。即使在1000 mA g(-1)的高电流密度下，仍保持607 mAh g(-1)的优越比容量，且没有明显衰减。
The emerging wearable and foldable electronic devices drive the development of flexible lithium ion batteries (LIBs). Carbon materials are considered as one of the most promising electrode materials for LIBs due to their light weight, low cost and good structural stability against repeated deformations. However, the specific capacity, rate capability and long-term cycling performance still need to be improved for their applications in next generation LIBs. Herein, we report a facile approach for immobilizing phosphorus into a large-area carbon nanosheets/nanofibers interwoven free-standing paper for LIBs. As an anode material for LIBs, it shows high reversible capacity of 1100 mAh g(-1) at a current density of 200 mA g(-1), excellent rate capabilities (e.g., 200 mAh g(-1) at 20,000 mA g(-1)). Even at a high current density of 1000 mA g(-1), it still maintains a superior specific capacity of 607 mAh g(-1) without obvious decay.