The most important scientific problem to solve for our modern society is how to convert and store clean energy. We are currently on the verge for a general breakthrough in electrical cars as well as for the small-scale (homeowner) energy conversion using solar cells and wind power. For this purpose there is a strong need for high-performance, safe and cheap rechargeable batteries. While Li-ion batteries are considered the main candidate for mobile energy storage applications, compounds based on lithium’s heavier cousin, sodium (Na) have recently started to receive a lot of attention. This is because sodium is one of the most abundant and cheap metals available on earth, making it a sustainable alternative. This proposed experiment aims to study a very recent sodium ion battery material called “Prussian White” that have displayed very promising performance in initial studies.