作为一个不对称的超级电容器,Ni2+协调/不协调的化物N-COF自支持纳米薄膜的高效合
Jia Zhang1, Zihao Zhang1, Xuteng Xing1
1College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China. xtxing@hebust.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|December 1, 2023
概括
我们为超级电容器开发了基于COF的新型纳米膜. 改性薄膜显著提高了能量密度,为先进的储能应用提供了有前途的材料.
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:
- 大量共价有机框架 (COF) 经常受到聚合和堆叠的影响,限制了它们的电化学性能.
- 开发自支持的COF纳米膜对于提高充电传输和设备效率至关重要.
研究的目的:
- 合成大面积的COFTAPB-BPY纳米膜,并用Ni2+离子使它们具有功能.
- 为了研究这些纳米膜的电化学特性,用于超级电容器应用.
- 根据这些COF纳米膜组装和评估不对称的超级电容器.
主要方法:
- 在气液接口上使用二甲基硫酸盐制备COFTAPB-BPY膜.
- 通过可逆还氧反应对COFTAPB-BPY与Ni2+离子进行修改.
- 对称和非对称薄膜超级电容器的制造和电化学测试.
主要成果:
- 实现了COFTAPB-BPY纳米膜,孔径为3.9nm,防止了散装材料的聚合.
- 证明了高特异电容:COFTAPB-BPY的0.26 mF cm-2和Ni-COFTAPB-BPY的0.38 mF cm-2.
- 与对称设备相比,不对称的Ni-COFTAPB-BPY//COFTAPB-BPY超级电容器表现出明显提高的能量密度 (273.9 mW h cm-3).
结论:
- 自支持的COF纳米膜,特别是当用Ni2+修改时,提供优越的电化学性能.
- 非对称的设备架构有效地利用了COF和Ni-COF纳米膜的特性.
- 这项工作提出了一种可行的策略,用于在高性能薄膜不对称超级电容器中应用COF纳米膜.
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