A novel Mn-based P2/tunnel/O3′ tri-phase composite cathode with enhanced sodium storage properties
Dong Wang, Yihua Liu, Zhenguo Wu, Xiaohong Liu, Jie Qu, Hao Liu, Yong Ming, Yanjun Zhong, Benhe Zhong, Xiaodong Guo
Abstract
A novel P2/tunnel/O3' composite Na0.7Bi0.01MnO2 cathode is developed via the Na+-site modification of Bi3+ in layer structure Na0.7MnO2 for the first time. Superior electrochemical performance with a high capacity retention of ∼86.5% after 300 cycles at 2C is obtained. Moreover, the tri-phase structure can also serve as a model material, which intuitively evidences the environmental structural stability order: tunnel > P2 > O3'.
Topics & Concepts
Composite numberCathodePhase (matter)SodiumMaterials scienceChemical engineeringChemistryComposite materialMetallurgyOrganic chemistryPhysical chemistryEngineeringAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesFerroelectric and Piezoelectric Materials