使用PEDOT:PSS导电聚合物作为离子电容器的阳极材料,对Li3VO4进行表面修改
Shih-Chieh Hsu1, Kuan-Syun Wang2, Yan-Ting Lin3
1Department of Chemical and Materials Engineering, Tamkang University, No. 151, Yingzhuan Road, Tamsui District, New Taipei City 25137, Taiwan.
Polymers
|June 10, 2023
概括
研究人员增强了离子电池阳极材料瓦纳酸 (Li3VO4) 通过涂上导电性聚3,4-乙烯二氧化硫:聚styrenesulfonate (PEDOT:PSS). 这种P-LVO复合材料在离子电容器中显示出更好的容量和性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 瓦纳酸 (Li3VO4) 由于其高容量,是离子电池的一个有前途的阳极材料.
- 由于电子导电性较低,其低速率能力阻碍了其实际应用.
- 导电性聚合物提供了一条改善电极材料性能的途径.
研究的目的:
- 为了提高Li3VO4阳极材料的电子导电性和电化学性能.
- 为了研究聚3,4-乙烯二氧化的功效:聚乙硫酸盐 (PEDOT:PSS) 涂层用于Li3VO4.
- 为了评估 PEDOT:PSS 装饰的 Li3VO4 (P-LVO) 在离子电池和电容器中的性能.
主要方法:
- 涂层Li3VO4纳米颗粒具有PEDOT:PSS.的统一层.
- 半电池中P-LVO作为阳极材料的电化学表征.
- 使用P-LVO作为负电极和活性碳作为正电极的离子电容器 (LIC) 的制造和测试.
主要成果:
- 与赤裸的LVO (111.3 mAh/g在8°C) 相比,P-LVO电极的容量显著更高 (191.9 mAh/g在8°C).
- P-LVO//AC离子电容在125W/kg时实现了107.0Wh/kg的能量密度.
- P-LVO//AC LIC表现出极好的循环稳定性,在2000个循环后保持97.4%的容量.
结论:
- 用PEDOT:PSS进行表面涂层有效地提高了Li3VO4的电子导电性和电化学性能.
- P-LVO复合材料显示出作为高性能储能设备的先进阳极材料的巨大潜力.
- 这一战略为开发下一代离子电池和电容器提供了可行的途径.
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