Tao Xian-Sen, Sun Yong-Gang, Liu Yuan, Chang Bao-Bao, Liu Chun-Tai, Xu Yan-Song, Yang Xiao-Chen, Cao An-Min
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, People's Republic of China.
University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
ACS Appl Mater Interfaces. 2020 Mar 18;12(11):13182-13188. doi: 10.1021/acsami.9b22736. Epub 2020 Mar 5.
Hollow carbon nanospheres (HCNs) have found broad applications in a large variety of application fields. Unfortunately, HCNs are known for their tedious operations and are incompetent for scalable synthesis for those widely adopted nanocasting-based routes. Here, we report a facile and highly efficient method for the creation of hollow carbon structures by tuning the growth kinetics of its polymeric precursor. We identified that a controlled polymerization of Cu-poly(-phenylenediamine) (Cu-PmPD) could form nanospheres with modulated inner chemical inhomogeneity, where the core of the particles was low in polymerization degree and water soluble, whereas the outer part was water insoluble. Therefore, a simple water washing of the prepared polymeric particles directly formed hollow nanospheres with a good control on the structural features including their cavity size and shell thickness. HCNs were formed through a following heat treatment and were able to exhibit promising potential as a stable anode material when tested in potassium-ion batteries.
中空碳纳米球（HCNs）已在众多应用领域中得到广泛应用。不幸的是，HCNs因其制备过程繁琐而闻名，并且对于那些广泛采用的基于纳米铸造的路线来说，无法进行可扩展的合成。在此，我们报告了一种通过调节其聚合物前驱体的生长动力学来创建中空碳结构的简便且高效的方法。我们发现，铜-聚（对苯二胺）（Cu-PmPD）的可控聚合可以形成具有调制内部化学不均匀性的纳米球，其中颗粒的核心聚合度低且可溶于水，而外部则不溶于水。因此，对制备的聚合物颗粒进行简单的水洗即可直接形成中空纳米球，并且能够很好地控制其结构特征，包括其空腔尺寸和壳厚度。通过后续的热处理形成了HCNs，并且在钾离子电池中进行测试时，能够展现出作为稳定阳极材料的潜在前景。
