了解聚合物中的固态光化学能量储存与阿佐二侧组的聚合物
Callum Wallace1, Kieran Griffiths1, Benjamin L Dale1
1Department of Chemistry, Lancaster University, Lancaster LA1 4YB, United Kingdom.
ACS applied materials & interfaces
|June 23, 2023
概括
太阳能热燃料聚合物通过光引起的结构变化来储存能量. 将基连接剂添加到亚博二烯侧组中,可以显著提高这些先进材料的能量储存和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 摄影化学的使用.
背景情况:
- 太阳能热燃料 (STF) 材料通过光活性分子的光诱导结构变化来储存能量,在重新转换时释放热量.
- 固态STF设备面临的挑战是由于凝结相中的分子流动性有限.
- 聚合物为固态STF提供了一个有前途的平台,通过平衡散装特性与分子级移动性.
研究的目的:
- 为STF应用系统地研究甲基酸盐和乙基酸盐基聚合物与亚博烯侧组.
- 阐明这些聚合物系统中能量储存和释放的机制.
- 确定影响能量密度和再转换动力学的因素.
主要方法:
- 合成和表征具有亚博烯侧组的聚合物,无论是直接附着的还是带有基连接器的.
- 光异构化研究以评估切换效率和异构状态转换.
- 热分析以确定玻璃过渡温度和再转换动力学.
- 重力测量能量密度测量. 重力测量能量密度测量.
主要成果:
- 具有直接附着的亚博基组的聚合物显示出与以前的研究一致的特性.
- 在亚博和聚合物骨干之间加入一个基连接器显著提高了光交换效率,接近量化转换到Z-异构体.
- 基连接剂降低了玻璃过渡温度,加速了热再转换,但固态半衰期超过4天.
- 实现了143 J g-1的最大重力测量能量密度,比直接附着的亚博烯聚合物增加了44%.
结论:
- 基连接剂对于优化基于亚博的聚合物STF至关重要,增强能量存储能力和光交换效率.
- 这些改性聚合物显示出需要日常能量储存和释放周期的应用潜力.
- 该研究确立了聚合物结构,特别是基连接剂的存在,与提高能量存储性能之间的明确联系.
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