While there are many factors that can contribute to the efficiency of charging (Q/Qmax) at different rates, the sweep rate dependence for CV experiments provides insight regarding the kinetics for intrinsic electrochemical processes. The current (mA), i, in battery electrode materials exhibits classic semi-infinite diffusion (that is, i∼v0.5), while supercapacitors are characterized by a linear sweep rate dependence on current, i∼v.