Since the commercialization of Li-ion batteries by the Sony corporation in 1991, the cathode material has proven to be the bottle-neck for their specific capacities. Due to the rapidly expanding utilization of energy from renewable sources with intermittent nature, there is an increasing demand for efficient energy storage. Resource scarcity of transition metal elements such as cobalt and nickel is driving the research for a new generation of batteries, which are sustainable and low-cost.