The high-rate performance of lithium/fluorinated carbon (Li/CFx) battery remains a challenge due to poor discharge dynamics behavior accompanied by the overheating issue. We developed a novel fluorinated reed-carbon with three-dimensional (3D) porous channels to favor discharge dynamics behavior achieving excellent discharge performance as high as 5 C. Typically, the preparation of fluorinated reed-carbon mainly involves three steps, namely, crushing into powders, pre-carbonization of reed and precise fluorination. During the fluorination process, we precisely controlled the fluorination temperature in range of 330–370 °C and gas ratio ( F2 of ~ 15 vol%) to optimize the fluorine carbon ratio. This kind of CFx possesses the novel structure at the scale of micron level ranging from 0.5 to 3 μm, which favors the electrolyte and charge transport through the channels smoothly. This 3D porous structure increases the specific surface area of the CFx material, providing more chemical reaction sites to enhance discharge dynamics behavior and effectively hinder the volume expansion of batteries, which is conductive to improve the high-rate performance of Li/CFx battery. This low-cost and facile approach opens up a novel pathway to design carbon materials and CFx for Li/CFx battery.

Fluorinated reed-carbon with three-dimensional porous channels to boost high-rate performance of lithiumfluorinated carbon battery
    Abstract
    1 Introduction
    2 Materials and methods
    3 Results and discussion
    4 Conclusion
    Acknowledgements 
    References

• Boliang Wang(Tianjin Lantian Special Power Supply Science and Technology Co., Tianjin 300393, China)
• Baosheng Bai(Tianjin Lantian Special Power Supply Science and Technology Co., Tianjin 300393, China)
• Guanjun Zhang(Tianjin Lantian Special Power Supply Science and Technology Co., Tianjin 300393, China)
• Xiwen Wang(Tianjin Lantian Special Power Supply Science and Technology Co., Tianjin 300393, China)
• Gaobang Chen(School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China)
• Qihui Sun(School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China)
• Xian Jian(School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China)