Fei Hua-Feng, Li Wenhao, Bhardwaj Ayush, Nuguri Sravya, Ribbe Alexander, Watkins James J
Department of Polymer Science and Engineering , University of Massachusetts Amherst , 120 Governors Drive , Amherst , Massachusetts 01003 , United States.
J Am Chem Soc. 2019 Oct 23;141(42):17006-17014. doi: 10.1021/jacs.9b09572. Epub 2019 Oct 11.
We report the preparation of ordered porous carbon materials with tailored pore sizes selected between 16 and 108 nm using bottlebrush block copolymers (BBCPs) as templates. The nanoporous carbons are prepared via the cooperative assembly of polydimethylsiloxane--poly(ethylene oxide) (PDMS--PEO) BBCPs with phenol-formaldehyde resin yielding ordered precursor films, followed by carbonization. The assembly of PDMS--PEO BBCPs with the resin leads to films exhibiting a spherical morphology (PDMS as the minor domain) with uniform domain sizes between 18 and 150 nm in the bulk. The assembled PDMS sphere diameters scale linearly with BBCPs molecular weights, allowing precise control of domain size. Access to very large ordered domains is an enabling hallmark of BBCPs self-assembly, but reports of well-ordered spherical domains are not common. Carbonization of the ordered precursor films yields nanoporous carbon with uniform and tunable pore size. These nanoporous carbons are shown to exhibit excellent performance as supercapacitor electrodes with capacitance reaching up to 254 F g at a current density of 2 A g.
我们报道了使用瓶刷状嵌段共聚物（BBCP）作为模板制备孔径定制在16至108纳米之间的有序多孔碳材料。纳米多孔碳是通过聚二甲基硅氧烷 - 聚环氧乙烷（PDMS - PEO）BBCP与酚醛树脂的协同组装制备出有序的前驱体薄膜，然后进行碳化得到的。PDMS - PEO BBCP与树脂的组装导致薄膜呈现球形形态（PDMS作为次要区域），整体上域尺寸均匀，在18至150纳米之间。组装的PDMS球体直径与BBCP的分子量呈线性比例关系，从而能够精确控制域尺寸。获得非常大的有序域是BBCP自组装的一个显著特征，但关于排列良好的球形域的报道并不常见。有序前驱体薄膜的碳化产生了孔径均匀且可调的纳米多孔碳。这些纳米多孔碳被证明作为超级电容器电极表现出优异的性能，在电流密度为2 A g时电容可达254 F g。
