Study on Influence of Different Activation Depths on Electrochemical Performance of Porous Anode Materials
Using petroleum coke as the precursor,a porous cathode material for lithium-ion capacitors was prepared by alkaline activation.By adjusting the mass ratio of alkaline to coke,the influence of different activation depths on the microstructure and electrochemical properties of the cathode material was explored.The results showed that when the alkali-coke ratio was 3∶1,the QDPC series porous anode materials had the largest specific surface area,the highest degree of correlation with current density,and the best rate performance.It was inferred that with the increase of alkali-coke ratio,the specific surface area of the material increased,optimizing the pore structure of the material while accelerating the diffusion and transport rate of ions and electrons,providing more lithium storage sites inside the pores,and improving the electrochemical performance of the material.
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