A one-step in-situ activation process has been adopted for the synthesis of micro and mesoporous carbon from neem leaves for use as a matrix for a sulfur cathode. The neem leaf micro and mesoporus carbon (NLMC) exhibits high surface area and also the graphitic nature of carbon. The sulfur infused NLMC-4 exhibits a high discharge capacity of 1396mAhg(-1) at a current rate of 0.1 C with promising cyclic stability (506mAh g(-1) @ 1C after 200 cycles). The porous structure of NLMC prevents polysulfide dissolution and increases the ion and electron mobility resulting in the superior electrochemical performance of sulfur cathode.