 Abstract, a new type of carbon material has been developed which could potentially be used as an anode material in potassium ion batteries, KIBs. The material, known as nitrogen carbon spherical, NCS, consists of a three-dimensional network of nitrogen-rich nanosheets embedded within a spherical carbon shell. The material was found to have excellent electrochemical performance, including a high specific capacity of 250 mAh per G at 200 mA per G and a high cycle life of 205 mAh per G at 1,000 mA per G. These results suggest that this material could be used as an anode material in KIBs. This article was authored by Yen Huali, Kuixiao, Tsonghuang, and others.