Study on Pseudocapacitance of Embedded Cobalt Tetroxide Anode Materials

The embedded Co₃O₄/CC flexible self-supporting anode material was prepared by using ZIF-67 as self-sacrificing template. Due to the interlaced conductive network structure and the existence of Co₃O₄ oxygen defect in carbon fabric matrix, the lithium ion transport is accelerated and the structural stability is improved. The Co₃O₄/CC anode material shows excellent battery performance, and the discharge specific capacity can still reach 518 mAh/g after 1 000 cycles at 5 A/g high current density. The high capacitance of Co₃O₄/CC anode is mainly due to pseudocapacitance effect, and the presence of pseudocapacitance is supported by ultra-fast surface/near-surface REDOX reaction detected by in-situ Raman spectroscopy.