混合塑料催化碳化合成碳包覆零价铁材料及其超级电容器储能应用研究

Synthesis of Carbon-Coated Zero-Valent Iron by Catalytic Carbonization of Mixed Plastics and the Study on Application of Supercapacitor Energy Storage

通过Fe2O3对聚丙烯(PP)和聚乙烯(PE)组成的混合塑料进行催化碳化成功制备了碳包覆零价铁(Fe@C)纳米颗粒。研究Fe@C材料的组成、形貌和碳转化率等,结果表明:内核为零价铁的纳米颗粒均匀分布,直径为100 nm左右,碳转化率可达26%。将Fe@C材料制成电极,在6 mol/L KOH溶液中比容量可达到100.5 F/g,具有较好的电化学性能。以一对Fe@C电极平行组装成的电容器可以达到116 F/g的比容量,且在4 900 W/kg的功率下产生21.5 Wh/kg的能量。循环2 000圈后还能保持97.3%的性能,具备优良的循环稳定性。

Carbon-coated zero-valent iron(Fe@C) nanoparticles was successfully prepared through catalytic carbonization of mixed plastics by Fe2 O3. The composition, morphology and carbon conversion rate of Fe@C materials were studied. As a result, the nanoparticles with zero-valent iron in the core were evenly distributed, the diameter was about 100 nm and the carbon conversion rate could reach 26%. The Fe@C material was used as an electrode, and the specific capacity could reach 100.5 F/g in 6 mol/L KOH solution, which had good electrochemical performance. A capacitor assembled with a pair of Fe@C electrodes in parallel could achieve a specific capacity of 116 F/g, and could produce 21.5 Wh/kg of energy at a power of 4 900 W/kg. And it could maintain 97.3% performance after 2 000 cycles with excellent cycle stability.