Sheng Lei, Xun Cui, Xufei Liu, Xiaofang Zhang, Xiaoyan Han, and Yingkui Yang: Hydrothermally Self-templated Synthesis of Rectangular Polyimide Submicrotubes and Promising Potentials in Electrochemical Energy Storage. Chemical Communications 2020, DOI: 10.1039/C9CC09526H.
https://pubs.rsc.org/en/content/articlelanding/2020/cc/c9cc09526h#!divAbstract