For COFF samples, the increase in specific capacity also appears but does not reach so high values. The best performing sample is SEED_HTC1200, that stands out at all rates and also presents a significant improvement of Csp when HTC pretreatment is used. As it has been shown in this work, the convergence of high specific surface area, rich surface electrochemistry, high proportion of closed microporosity and open interlayer spacing make SEED_HTC1200 the best performing material among the studied samples.