Both capacities measured with and xA mA xA g minus
10 as a comparison. In the stoichiometric series, the low-rate capacity first increases and then decreases while the HRD continues to drop as the Y-content increases. The initial increase in capacity is due to the increase in C15 phase, which may possess a higher storage capacity . The decreases in both capacity and HRD are due to the increase of TiNi phase, which has a smaller storage capacity and slower reaction  and .