Abstract
The structure and specific electrochemical characteristics of a mixed cathode material based on ground LiNi1/3Mn1/3Co1/3O2 (NMC111) and highly porous activated carbon YEC-8B were studied. The mixed material containing 35 wt. % NMC111 and 65 wt. % YEC-8B (based on the mass of active materials), has a specific capacity ∼70% higher in comparison with the cathode material based on pure coal YEC-8B. It was shown that while cycling a lithium-ion supercapacitor with a cathode based on this mixed material at high current densities, no significant changes took place in the electrochemical characteristics of the material. It was demonstrated that this type of cathode material has two advantages: at low current densities it displays the charge-discharge properties of the cathode material of a lithium-ion battery with high specific energy, and at high current densities, it functions as a material of a supercapacitor with high specific power.
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