A slug-based microreactor system was constructed to integrate the redox reaction between KMnO₄ and MnSO₄ with the chemical oxidative polymerization of pyrrole for the preparation of MnO₂/PPy composite with a typical core-shell structure. MnO₂ was formed as the core while PPy acted as the shell. The size distribution variation of MnO₂ particles was elaborated by the crystallization theory and the comparison between the micromixing time and the nucleation induction time. It was found that the morphology of the MnO₂/PPy composite was significantly affected by the molar ratio among KMnO₄, MnSO₄ and pyrrole and the residence time due to the competition between the pyrrole polymerization and the MnO₂ crystallization. A probable mechanism for the formation of the PPy/MnO₂ composite was proposed. The maximum specific capacitance of 303 F/g was achieved at the scan rate of 20 mv/s with the voltage window ranging from -0.3 to 0.7 V (vs. Ag/AgCl) in 1 M Na₂SO₄ solution using a three-electrode test system. The electrochemical performance of the MnO₂/PPy composite with core-shell was better than that of MnO₂. The enhanced performance demonstrated the synergistic effect between MnO₂ and PPy for the fabrication of the core-shell structure. This work developed the design of particles with core-shell structures from the droplet-based microreactor to the slug-based microreactor with a relatively higher flux. The size of the prepared material decreased from microscale in the droplet-based microreactor to nanoscale in this slug-based microreactor. Such a novel strategy can be applied for efficiently preparing functional materials with controllable structures and properties.

建立了基于团状的微反应器系统，将KMnO ₄和MnSO ₄之间的氧化还原反应与吡咯的化学氧化聚合反应相结合，以制备具有典型核-壳结构的MnO ₂ / PPy复合材料。以MnO ₂为核，而PPy为壳。通过结晶理论和微混合时间与成核诱导时间的比较，阐述了MnO ₂颗粒的尺寸分布变化。结果发现，MnO ₂ / PPy复合材料的形态受到KMnO _4与MnSO ₄摩尔比的显着影响。由于吡咯聚合和MnO ₂结晶之间的竞争，因此具有吡咯和停留时间。提出了形成PPy / MnO ₂复合材料的可能机理。在1 M Na ₂ SO ₄溶液中，使用三电极，在20 mv / s的扫描速率下，电压窗口范围为-0.3至0.7 V（vs. Ag / AgCl），可实现303 F / g的最大比电容。电极测试系统。核壳型MnO ₂ / PPy复合材料的电化学性能优于MnO ₂。增强的性能证明了MnO ₂之间的协同作用PPy用于制造核壳结构。这项工作开发了具有核-壳结构的颗粒，从基于液滴的微反应器到具有相对较高通量的基于团状的微反应器的设计。所制备的材料的尺寸从基于液滴的微反应器中的微尺度减小到该基于团块的微反应器中的纳米尺度。这种新颖的策略可用于有效制备具有可控结构和性能的功能材料。