Synergistic control of cohesive and adhesive forces in anchored porous CoMn 2 O 4 for superior reversible lithium-ion storage and high energy-power density

초록

Today, the growing demand for environmentally friendly energy storage systems has prompted extensive research on improving electrode performance due to the rapid advancement of portable electronic devices. In this investigation, we successfully synthesized CoMn 2 O 4 (CMO) microspheres featuring uniformity, as well as hollow and porous structures. Through the controlled cohesive and adhesive forces during the calcination process, we achieved the synthesis of CoMn 2 O 4 microspheres with porous and hollow characteristics, utilizing CoMn-glycolate solid microspheres as the precursor. By integrating a three-dimensional network of reduced graphene oxide (rGO) anchored CoMn 2 O 4 (P-CMO) microspheres, we enhanced the surface area and accelerated ion diffusion in Li -ion storage devices. The rGO-P-CMO composite achieved a discharge capacity of 1457 mAh g -1 at 100 mA g -1 , surpassing the theoretical limit, and retained 80 % capacitance at 1000 mA g -1 . Besides, we constructed a novel rechargeable lithium -ion battery (LIB) full cell utilizing the rGO-P-CMO microspheres as the anode and the Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNCO) as the cathode. The LIB full cell (rGO-P-CMO||LMNCO) exhibited a discharge capacity of 147 mA g -1 and achieved a practical energy density of 220.5 Wh kg - 1 , considering the combined weight of the active electrode materials. Therefore, the exceptional electrochemical performance displayed by the proposed LIB full cell configuration holds significant potential in advancing the development of next -generation, high-performance batteries tailored for electric vehicle implementations.

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