多孔氮掺杂FeP/C纳米纤维作为钾离子电池负极
Porous nitrogen-doped FeP/C nanofibers as promising anode for potassium-ion batteries
张文 1刘烨 1叶仲强 1阳敏 1罗琪 1戴晶 1王乾富 1刘黎1
作者信息
- 1. National Base for International Science&Technology Cooperation,National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery,Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion,Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan 411105,China
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摘要
由于自然界中钾储量巨大且K+/K电位低,钾离子电池(PIBs)被认为是锂离子电池的替代品之一.因此,在这项工作中,我们合成了多孔氮掺杂 FeP/C 纳米纤维(P-FeP/C-N NFs),一种用于PIB的新型电极材料.通过简单的静电纺丝和随后的煅烧处理,将聚丙烯腈(PAN)和聚甲基丙烯酸甲酯(PMMA)分别用作氮源和造孔剂,引入氮提高了材料的导电性,多孔结构的形成增加了比表面积.将P-FeP/C-N NFs用作钾离子电池的电极,表现出优异的电化学性能.P-FeP/C-N NFs电极在100 mA/g循环250次后放电容量为274.2 mA·h/g,在1000 mA/g循环300次后放电容量为171.3 mA·h/g.即使在5000 mA/g下,也显示出150.1 mA·h/g的高放电容量.结果表明P-FeP/C-N NFs有望成为钾离子电池负极材料的候选材料.
Abstract
Potassium-ion batteries(PIBs)are regarded as one of the alternatives to lithium-ion batteries due to the vast potassium reserves in nature and low potential of K+/K.Therefore,in this work,we successfully synthesized porous nitrogen-doped FeP/C nanofibers(P-FeP/C-N NFs),a novel electrode material for PIBs,via simple electrospinning and subsequent calcination treatment,in which polyacrylonitrile(PAN)and polymethylmethacrylate(PMMA)are used as nitrogen source and pore-forming agent,respectively.The introduction of nitrogen improves the conductivity of the material,and the formation of a porous structure increases the specific surface area.More importantly,when the P-FeP/C-N NFs were used as electrode for potassium ion batteries,they exhibit excellent electrochemical performance.The P-FeP/C-N NFs electrode exhibits a discharge capacity of 274.2 mA·h/g at 100 mA/g after 250 cycles and 171.3 mA·h/g at 1000 mA/g after 300 cycles.Even at 5000 mA/g,it displays a high discharge capacity of 150.1 mA·h/g.These findings indicate that the P-FeP/C-N NFs are expected to be a candidate of anode materials for potassium ion batteries.
关键词
静电纺丝/FeP/氮掺杂/多孔纳米纤维/钾离子电池Key words
electrospinning/FeP/nitrogen-doping/porous nanofibers/potassium ion batteries引用本文复制引用
基金项目
国家自然科学基金(52072325)
Key Research Foundation of Education Bureau of Hunan Province,China(20A486)
Hunan 2011 Collaborative Innovation Center of Chemical Engineering and Technology with Environmental Benignity and Effective Res(1337304)
出版年
2023
NETL
NSTL
万方数据