电极
阴极
电化学
泥浆
碳纳米纤维
静电纺丝
阳极
碳纤维
材料科学
纳米纤维
化学工程
纳米技术
化学
复合材料
碳纳米管
复合数
聚合物
物理化学
工程类
作者
Xinyang Liu-Théato,Sylvio Indris,Weibo Hua,Hang Li,Michael Knapp,Georgian Melinte,Helmut Ehrenberg
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2021-11-08
卷期号:35 (22): 18768-18777
被引量:7
标识
DOI:10.1021/acs.energyfuels.1c02779
摘要
A new electrode design for sodium-ion batteries with a self-standing, collector-free, binder-free maricite NaFePO4/carbon nanofiber hybrid cathode is successfully realized via electrospinning. An increasing capacity is observed in the initial cycles, and finally, the electrode reached a capacity of 108 mAh g–1 at a 0.1 C rate after 200 cycles. In comparison, a slurry-based NaFePO4 electrode yields a capacity of only around 20 mAh g–1. An overall improved electrochemical performance was obtained in the hybrid cathode compared to pure slurry-based NaFePO4 electrode and pure carbon nanofibers. A comprehensive study of the morphology, structure, and electrochemical performance of the hybrid electrode is conducted. Mössbauer spectra show an increasing Fe3+ content from 43.2% in the first charged state to 63.0% in the charged state after 100 cycles, demonstrating an activating process of maricite NaFePO4 upon extensive charge–discharge cycling. This work has explored a direct electrospun self-standing maricite NaFePO4 electrode and its feasibility and mechanism as a cathode material in sodium-ion batteries.
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