Department of Medical Biotechnology, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi 10326, Republic of Korea.
Interaction Laboratory, Future Convergence Engineering, Advanced Technology Research Center, Korea University of Technology and Education, Cheonan-si 31253, Chungcheongnam-do, Republic of Korea.
Int J Biol Macromol. 2023 Dec 31;253(Pt 5):127154. doi: 10.1016/j.ijbiomac.2023.127154. Epub 2023 Oct 2.
The rising demand for green and clean energy urges the enlargement of economical and proficient electrode materials for supercapacitors. Herein, we designed a novel electrode material by porous cellulose graphitic carbon (CC) derived from bio-waste cornhusk via the pyrolysis route, and α-FeO decorated nanostructure with CC (CCIO) was achieved in situ pyrolysis of corn-husk and Fe(NO)·9HO metal salt followed by a coating of polypyrrole (CCIOP). The CC, CCIO, and CCIOP nanocomposite electrodes were characterized by XRD, Raman, FTIR, FE-SEM/EDX, FE-TEM, XPS, and BET analysis. The CCIOP nanocomposite electrode exhibits an enhanced specific capacitance (Csp) of 290.9 F/g, which is substantial to its pristine CC (128.3 F/g), PPy (140.3 F/g), and CCIO (190.7 F/g). The Csp of CCIOP in a three-electrode system, using 1 M NaSO electrolyte exhibits excellent capacity retention of 79.1 % even at a high current density of 10 A/g. The as-fabricated asymmetric supercapacitor (ASC) delivered a remarkable capacity retention of 88.7 % with a coulombic efficiency of 98.8 % even after 3000 cycles. The study shows successful utilization of cellulose from bio-waste cornhusk into a substantial template applicable in future alternative energy storage devices.
对绿色清洁能源的需求不断增长，促使人们对用于超级电容器的经济高效电极材料的需求不断扩大。在此，我们通过热解途径，以生物废料玉米皮为原料设计了一种新型的多孔纤维素石墨碳（CC）电极材料，通过玉米皮和 Fe(NO)·9HO 金属盐的原位热解原位生成了α-FeO 纳米结构，并在其表面包覆了聚吡咯（CCIOP）。采用 XRD、Raman、FTIR、FE-SEM/EDX、FE-TEM、XPS 和 BET 分析对 CC、CCIO 和 CCIOP 纳米复合材料电极进行了表征。CCIOP 纳米复合材料电极的比电容（Csp）为 290.9 F/g，明显高于其原始 CC（128.3 F/g）、PPy（140.3 F/g）和 CCIO（190.7 F/g）。在三电极系统中，使用 1 M NaSO 电解质，CCIOP 的 Csp 在 10 A/g 的高电流密度下表现出优异的容量保持率，为 79.1%。所制备的非对称超级电容器（ASC）在 3000 次循环后，仍具有 88.7%的出色容量保持率和 98.8%的库仑效率。该研究表明，成功地利用生物废料玉米皮中的纤维素作为一种有前途的模板，适用于未来的替代储能设备。
