Nitrogen-doped carbon microfiber networks decorated with CuO/Cu clusters as self-supported anode materials for potassium ion batteries

摘要: Abstract In light of the sluggish potassiation kinetics in potassium ion batteries, herein, we report a self-supported anode material composed CuO/Cu clusters distributed nitrogen-doped carbon microfibers (CuO/Cu-NCNFs electrode) via simple electrospinning technology. By this way, three-dimensional conductive networks interwoven by CuO/Cu-NCNFs were successfully obtained. As expected, materials for batteries reveals better electrochemical performance compared with (NCNFs). There is still reversible capacity 205.9 mAh g−1 remained electrode undergoing 100 cycles at 100 mA g−1. With in-depth investigation, show more obvious pseudocapacitive characteristic than that NCNFs. The improved capacitive contribution discloses reason fast CuO/Cu-NCNFs. It believed presence significantly favors advancement mechanical property and stability microfiber networks, giving rise to can be predicted innovative potocol frameworks will provide explicit direction toward engineering high batteries.