Revealing the Fast and Durable Na⁺ Insertion Reactions in a Layered Na₃Fe₃(PO₄)₄ Anode for Aqueous Na-Ion Batteries.

ABSTRACT: Aqueous sodium-ion batteries represent a promising approach for stationary energy storage; however, the lack of appropriate anode materials has substantially retarded their development. Herein, we demonstrated an iron-based phosphate material of Na₃Fe₃(PO₄)₄ as an inexpensive and efficacious anode alternative. While the Fe³⁺/Fe²⁺ redox couple renders a two-Na-insertion reaction with desirable potentials, its unique layered structure further facilitates the Na-insertion kinetics and reversibility. Consequently, this electrode exhibits an appealing Na-insertion performance, with a reversible capacity of ∼83 mAh g^-1, suitable anode potential of -0.4 V vs Ag/AgCl, excellent rate capability of 200 C, and outstanding cy

SUBMITTER: Qiu S 

PROVIDER: S-EPMC9888640 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature