Magnetothermal Microfluidic-Assisted Hierarchical Microfibers for Ultra-High Energy Density Supercapacitors.

作者：Huijiao Qiu, Hengyang Cheng, Jinku Meng, Guan Wu, Su Chen · 发表于：Angewandte Chemie · 年份：2020 · DOI：10.1002/anie.202000951 · 被引用次数：68 · 研究领域：Medicine、Materials Science

Chemical architectures with ordered porous backbone and high charge transfer are significant for fiber-shaped supercapacitors (FSCs). However, due to the sluggish ion kinetic diffusion and storage in compacted fibers, achieving high energy density remains a challenge. Here, we propose an innovative magnetothermal microfluidic method to efficiently design hierarchical carbon polyhedrons/holey graphene (CP/HG) core-shell microfibers. Due to highly magnetothermal etching and microfluidic reactions, the CP/HG fibers maintain open inner-linked ionic pathway, large specific surface area and moderate nitrogen active-site, facilitating rapider ionic dynamic transportation and accommodation. The CP/HG FSCs display an ultra-high energy density of 806 μWh cm -2 and large areal capacitance of 2760 mF cm -2 . More importantly, an actually self-powered endurance application with the integration of chip-based FSCs is designed to profoundly drive the durable motions of electric car and walking robot.