Constructing Layered/Tunnel Biphasic Structure via Trace W-Substitution in Tunnel-Type Cathode for Elevating Sodium Ion Storage.

ABSTRACT: Tunnel-type Na_0.44MnO₂ is extensively regarded as an appealing cathode for sodium-ion batteries due to its cost-effectiveness and excellent cycling performance. However, low theoretical capacity, resulting from insufficient Na⁺ storage sites, hinders its practical application. Herein, the strategy of constructing a tunnel-phase-dominated layered/tunnel biphasic compound was proposed via trace W-substitution and the co-precipitation method. Experimental analysis reveals that W-introduction can effectively redistribute electronic configuration, induce tunnel-to-layered structure evolution, accelerate Na⁺ (de)intercalation kinetics, and enhance structural stability. The optimized layered/tunnel Na_0.44Mn_0.99W_0.01O

SUBMITTER: Shi W 

PROVIDER: S-EPMC12113807 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature