Abstract
Zn-MnO2 batteries are safe, low cost, and have a high energy density comparable to Li-ion batteries. This study focuses on finding a new MnO2-based cathode composition for rechargeable mildly acidic Zn-MnO2 battery. For this purpose, a combinatorial approach was used, and thick film cathodes were deposited on nickel substrates using sputter targets MnO2, Na0.7MnO2, NiO and Bi2O3. A total of 36 cathodes were produced over a wide compositional range. The study has shown two regions of high rechargeable capacity, one centered on Bi0.02Na0.63Ni0.02Mn0.33Ox and the other on Bi0.04Na0.37Ni0.06Mn0.53Ox to be developed as cathodes using conventional slurry method.
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