State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China.
China Automotive Engineering Research Institute Co., Ltd., Chongqing 400030, PR China.
J Colloid Interface Sci. 2019 Dec 1;557:168-173. doi: 10.1016/j.jcis.2019.09.024. Epub 2019 Sep 7.
The 1D low-crystalline and ultrathin MnO-RT nanotubes consisted of tiny nanoflakes are rapid synthesized at ambient temperature through a facile oxidation-etching method, where Cu nanowires are served as sacrificial templates. Meanwhile, the MnO-RT nanotubes can be undergone further nucleation and growth to generate 3D porous MnO nanotubes by calcination treatment and hydrothermal reaction, respectively. Importantly, the high specific capacitance of 384.6 F g is obtained at the current density of 0.25 A g for the low-crystalline MnO-RT nanotubes, owing to its ultra-thin wall thickness, high surface area and highly disordered structure. Furthermore, the cycle stability of the low-crystalline MnO nanotubes can be improved by hydrothermal treatment, owing to the enhanced crystallinity.
一维低结晶度和超薄的 MnO-RT 纳米管由微小的纳米片组成，通过简便的氧化刻蚀方法在室温下快速合成，其中 Cu 纳米线用作牺牲模板。同时，MnO-RT 纳米管可以通过煅烧处理和水热反应分别进一步成核和生长，生成 3D 多孔 MnO 纳米管。重要的是，由于其超薄的壁厚、高比表面积和高度无序的结构，低结晶度的 MnO-RT 纳米管在 0.25A/g 的电流密度下具有 384.6F/g 的高比电容。此外，通过水热处理可以提高低结晶度 MnO 纳米管的循环稳定性，这是由于结晶度的提高。
