氟化科琴黑/石墨烯复合材料及电化学性能研究

doi:10.19799/j.cnki.2095-4239.2024.1038

摘要/Abstract

摘要：

锂氟化碳（Li/CFx）电池在目前已知锂原电池中具有最高的比能量。然而这种电池在放电过程中存在电压平台较低、实际比能量低、倍率性能较差等问题。本文以科琴黑作为碳源，采用固相直接氟化法制备氟化科琴黑（fluorinated Keqin black, FKB），通过溶液-热还原法制备氟化科琴黑/石墨烯复合材料（FKB/RGO），提高了材料的导电性，增大了电极材料与电解液的活性接触面积，缩短了锂离子的扩散路径，实现了FKB/RGO在0.1C倍率下放电比容量为858.4mAh/g，10C放电容量达到550.6mAh/g，表现出优异的能量密度和倍率性能。本研究有助于推动FKB/RGO材料在锂氟化碳电池中的工程化应用。

关键词: 氟化科琴黑, 石墨烯, 能量密度, 锂氟化碳电池

Abstract:

Lithium fluoride carbon (Li/CFx) batteries have the highest specific energy among currently known lithium primary batteries. However, this type of battery has issues such as low voltage plateau, low actual specific energy, and poor rate performance during discharge. This article uses commercial Keqin black as a carbon source and uses solid-phase direct fluorination method to prepare fluorinated Keqin black (FKB). The FKB/RGO composite material is prepared by solution thermal reduction method, which improves the conductivity of the material, increases the active contact area between electrode material and electrolyte, shortens the diffusion path of lithium ions, and achieves a discharge specific capacity of 858.4mAh/g at 0.1C and a discharge capacity of 550.6mAh/g at 10C, demonstrating excellent energy density and rate performance, the study contributes to promoting the engineering application of FKB/RGO materials.

Key words: fluorinated Keqin black, graphene, energy density, Lithium fluoride carbon batteries

中图分类号:

TM912.9

张亮, 周雄, 滕久康, 杨文静, 黎学明. 氟化科琴黑/石墨烯复合材料及电化学性能研究[J]. 储能科学与技术, doi: 10.19799/j.cnki.2095-4239.2024.1038.

Liang Zhang, Xiong Zhou, Jiukang Teng, Wenjing Yang, Xueming Li. Electrochemical Properties of Fluorinated Keqin Black/Graphene Composite Materials[J]. Energy Storage Science and Technology, doi: 10.19799/j.cnki.2095-4239.2024.1038.

图/表 12

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