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有序单一原始双连续架构的多孔聚合物立方体及其电池

Luoxing Xiang¹, Siqi Yuan¹, Faxing Wang²

¹School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai200240, China.

Journal of the American Chemical Society

|August 18, 2022

概括

研究人员开发了一种使用聚合物立方体制造双连续多孔聚合物的新方法. 这些材料对-电池具有前景,可实现高容量和稳定性.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
电化学电化学电化学

背景情况:

双连续的多孔材料为能源和催化应用提供高效的质量传输.
将这些材料与受控结构合成仍然是一个重大挑战.

研究的目的:

开发一种用于合成具有有序单个原始 (SP) 立方结构的双连续多孔聚合物的一般方法.
探索这些材料在电池中的应用.

主要方法:

使用聚合物立方体作为合成聚烯 (SP-PPy),聚二胺 (SP-PmPD) 和聚多巴胺 (SP-PDA) 的模板.
以其结构性质 (单元细胞,孔径,表面积) 来表征合成的SP-PPy.
通过电化学测试,离子扩散实验和理论计算,研究了I2-adsorbedSP-PPy作为Na-I2电池中的阴极材料的性能.

主要成果:

成功合成了SP-PPy,SP-PmPD和SP-PDA与受控的SP立方结构.
合成的SP-PPy的单元细胞参数为99nm,孔径为45nm,具体表面积为~60m2/g.
在Na-I2电池中,SP-PPy表现出高的特定容量 (235 mA·h·g−1在0.5°C),优异的速率能力和循环稳定性 (在1°C下400个循环中每周期衰减0.12%).

结论:

聚合物立方体模板方法为创建具有多种拓的双连续多孔聚合物提供了一条一般路线.
SP-PPy的独特结构和吸附机制有助于其在Na-I2电池中的卓越性能.
这项工作扩大了双连续材料的库,并提出了多孔聚合物在储能中的新应用.

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