Aluminum Substituted gamma–MnO2 Electrode For Secondary Cells, D. Nayak, P.K. Jha, A. Agarwal, S. Janakiraman, N.V.P. Chaudhary, K. Biswas, S. Ghosh, V. Adyam, S. Puravankara (Filed, Indian Patent Application No.: 201931013311, dated April 2, 2019)