Aqueous ion battery positive electrode material, positive electrode and application in battery field

The invention relates to an aqueous ion battery positive electrode material containing a layered structure metastable crystal, a positive electrode and an application in the field of batteries. The positive electrode material comprises a substrate and a coating layer coated on the substrate, wherein the coating layer comprises NiSeO3.H2O, single-layer graphene, conductive agent and binder, and thelayered metastable state crystal material is NiSeO3.H2O micron crystal. The water-based ion battery assembled by adopting the positive electrode material shows lithium ion storage performance with high specific capacity and excellent rate capability. 一种含层状结构亚稳态晶体的水系离子电池正极材料、正极以及在电池领域的应用，所述正极材料包括基片，以及涂覆在基片上的涂层，涂层包括所述NiSeO·HO、单层石墨烯、导电剂和粘结剂，其中，层状亚稳态晶体材料为NiSeO·HO微米晶。采用本发明正极材料而组装成的水系离子电池，展现出比容量高、倍率性能优异的锂离子存储性能。