Division of Wood Chemistry & Microbiology, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea.
Division of Wood Processing, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea.
Int J Biol Macromol. 2018 Jun;112:943-950. doi: 10.1016/j.ijbiomac.2018.02.048. Epub 2018 Feb 10.
Low-cost, high-performance electrodes are highly attractive for practical supercapacitor applications. MnO-deposited carbon nanofiber mats (MnO-CNFMs) are prepared for use as binder-free supercapacitor electrodes. MnO is deposited on the mats in situ by hydrothermally decomposing aqueous KMnO, leading to the formation of nanocrystals of MnO. The MnO-CNFM electrode produced with 38.0μmol KMnO (this electrode) shows a high specific capacitance of ~171.6F·g at a scan rate of 5mV·s. Moreover, a symmetric supercapacitor with the electrode exhibits a specific capacitance of 67.0F·g, an energy density of 6.0Wh·kg and a power density of 160W·kg at a special current of 0.1A·g. Further, the symmetric supercapacitor displays excellent cycling stability, retains approximately 99% of the capacitance after 1000cycles. The simplicity and ease of preparation of the MnO-CNFMs as well as their suitability for use in coin-type supercapacitor cells make them ideal for application in cost-effective and high-performance electrodes for supercapacitors.
低成本、高性能的电极对于实际的超级电容器应用具有很大的吸引力。本文制备了一种用作无粘结剂超级电容器电极的MnO 沉积碳纳米纤维毡（MnO-CNFMs）。MnO 通过水热分解水溶液中的 KMnO 在纳米纤维毡上原位沉积，形成 MnO 的纳米晶体。用 38.0μmol KMnO 制备的 MnO-CNFM 电极（该电极）在扫描速率为 5mV·s 时表现出约 171.6F·g 的高比电容。此外，具有该电极的对称超级电容器在 0.1A·g 的特定电流下表现出 67.0F·g 的比电容、6.0Wh·kg 的能量密度和 160W·kg 的功率密度。进一步地，对称超级电容器显示出优异的循环稳定性，在 1000 次循环后保留约 99%的电容。MnO-CNFMs 的制备简单且易于制备，并且适合用于硬币型超级电容器电池，使其成为用于超级电容器的具有成本效益和高性能电极的理想选择。
