李华,孙德杭,张奡,赵诗沁,郭晓远,徐晨轩,季石宇

• 1:中国电建集团华东勘测设计研究院有限公司

摘要(Abstract)：

针对磷酸铁锂(LFP)电子电导率低这一本征问题，文中提出了以单宁酸(TA)为绿色碳源，结合溶剂辅助研磨制备核壳型LFP/C复合材料。该策略利用TA中丰富的酚羟基与羧基官能团在研磨过程中诱导LFP均匀成核，并在高温碳化过程中原位形成纳米碳壳。结构表征证实，所形成的均匀包覆结构不仅有效提升了界面接触与电子导电性，还可增强材料的结构稳定性与亲水性。电化学测试表明，碳含量为7.7%（质量分数）的样品在1 A·g~(-1)下比电容达到153 F·g~(-1)；在5 A·g~(-1)下循环500次后容量保持率达70.5%，库伦效率保持在99.98%。同时，基于该材料构建的非对称混合电容器分别达到了7.6 Wh·kg~(-1)、1 189.6 W·kg~(-1)的能量密度和功率密度。该工作不仅提供了一种可扩展、绿色、高效的电极构筑策略，也为发展高功率、安全性优异的水系储能器件提供了新的设计思路。

关键词(KeyWords)： 单宁酸;LiFePO_4;核壳结构;水系锂离子电容器

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李华,孙德杭,张奡,赵诗沁,郭晓远,徐晨轩,季石宇

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