The nanoparticles of amorphous Ni–B and Ni–Mn–B alloys are synthesized and investigated as electrochemical pseudocapacitor materials for potential energy storage applications. The specific capacitance of Ni–B and Ni–Mn–B electrodes are observed to be 562 and 768 F g−1, respectively. The capacitance of Ni–B and Ni–Mn–B retained 65% and 68% of their initial value after a cycle life of 1500 cycles.
