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构建高性能离子电池阳极,用盐剥离共价三酸框架
Jingyi Zhang1, Xuwang Fu1, Jiacheng Qiu1
1College of Physics and Materials Science, Tianjin Normal University, Tianjin, 300387, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 26, 2024
概括
一种新的融盐剥离方法增强了电池的化共价三酸框架 (FCTF). 这一过程产生了基于铁的位,提高了,和离子电池的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 聚合 triazine 框架 (CTF) 显示出由于调节性质和稳定性而作为电池电极的前景.
- 有限的离子吸附/脱附点阻碍了CTF的实际应用.
- 化CTF (FCTF) 是一个具有储能潜力的子类.
研究的目的:
- 开发一种方法,在FCTF中创建稳定的离子储存站点.
- 为了提高可充电电池FCTF的电化学性能.
- 为了研究修改后的FCTF中的离子储存机制.
主要方法:
- 一种使用化铁 (FeCl3) 来分层FCTF结构的融盐剥离工艺.
- 使用像XRD和XPS这样的技术对改性材料 (Fe@FCTF) 的表征.
- 在离子电池 (PIB),离子电池 (SIB) 和离子电池 (LIB) 中作为阳极的Fe@FCTF的电化学测试.
主要成果:
- 融盐剥离过程成功地分层了FCTF,并引入了基于铁的活性站点.
- Fe@FCTF表现出高容量 (447 mAh g-1 在0.1 A g-1) 和良好的循环稳定性.
- 该方法还改善了Na+和Li+存储能力,表明了多功能性.
结论:
- 化FeCl3脱落的FCTF (Fe@FCTF) 是用于PIB,SIB和LIB的高效阳极材料.
- 性能提升归因于增加层间距离和改进的电子/离子传输.
- 一个涉及CN组,pyrazines和铁协调位点的逐步化机制控制了离子储存.
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