 They have shown to greatly improve capacity and cyclability of lithium-ion batteries, as well as the capability to be very effective buffering components, alleviating the degradation of the batteries that is typically due to repeated charging and discharging.Further, electronic transport in the anode can be greatly improved using highly metallic CNTs.More specifically, CNTs have shown reversible capacities from 300 to 600 mAhg−1, with some treatments to them showing these numbers rise to up to 1000 mAhg−1.