Ammonium cobalt(II) phosphate monohydrate serves as a key precursor in the synthesis of cobalt-based phosphate materials for lithium-ion battery cathodes, enabling structures that support lithium ion intercalation. It offers good thermal stability and moderate electrochemical performance, making it suitable for energy storage systems prioritizing safety and cycle life. Additionally, it is utilized in the preparation of cobalt-based catalysts for oxidation reactions and functional materials for electrochemical applications.