用于能源应用的中孔无机材料的脊柱分解驱动的结构层次结构
Minkyeong Ban1, Dongyoon Woo1, Jongkook Hwang2
1Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daehak-ro 291, Daejeon 34141, Republic of Korea.
Accounts of chemical research
|November 15, 2023
概括
本研究介绍了一种新型的合成方法,用于使用旋转分解 (SD) 和块共聚物 (BCP) 的等级结构的中孔无机材料 (MIM). 这种方法精确地控制了宏观和半导体结构,使能储能领域的先进应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术 纳米技术
背景情况:
- 由区块共聚合物 (BCP) 指导的半孔无机材料 (MIM) 具有较高的表面积和可调节的孔隙.
- 对层次结构MIM的现有方法是复杂的和多步骤的,在有序的中等度控制方面面临挑战.
- 脊柱分解 (SD) 为精确控制宏观和半导体结构提供了一个有前途的途径,但对于MIM来说仍未得到充分探索.
研究的目的:
- 开发新的合成系统,将旋转分解 (SD) 和块共聚物 (BCP) 自组装结合起来,用于层次结构的MIM.
- 为了能够精确地控制MIM的宏观结构 (宏孔,粒子形态) 和中层结构 (孔径大小,组成).
- 探索这些层次结构的MIM在先进的储能设备中的应用.
主要方法:
- 利用含有BCP的多组分混合物和设计的火条件来诱导SD并产生用于巨孔形成的相互连接的宏观结构.
- 在聚合物混合物 (BCP,同聚合物,无机前体) 中使用SD来控制宏观形态,包括球形和异型粒子.
- 研究了聚合物之间的界面张力对MIM的宏观形态学和孔隙方向的影响.
主要成果:
- 成功生成了具有受控宏孔大小和可调节的宏观形态 (例如,固体/空洞球体,圆形,碗,2D纳米片) 的MIM.
- 证明了该方法在各种组成中的多功能性,包括碳,SiO2,TiO2,WO3,TiNb2O7和TiN.
- 展示了层次结构MIM的应用,以提高离子和硫电池的离子/质量转移和容量,并实现离子电池的高体积容量.
结论:
- SD驱动的合成提供了一个强大的平台,用于创建分层结构的MIM,并精确控制结构特征.
- 这种方法将聚合物科学原理与无机材料合成相结合,用于先进的材料设计.
- 开发的MIM显示出在各种储能应用中提高性能的巨大潜力.
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