I have been trying to make a PIB with CuCo2S4@NCs (with nitrogen doped carbon) as anode material and all of my result i.e, XRD, SEM, TEM and C.V e.t.c are good but the Galvanostatic Charge/discharge test result is not good and I have tried many times to change the precursors for Carbon and used different concentrations of Sulfur but the problem still their. It does not show any capacity or it does show some but than quickly in another cycle it becomes zero than, What is the issue here?