Rational Design of Prussian Blue Analogs Cathodes With “Dual‐Channel” Structure for Wide‐Temperature‐Range Sodium‐Ion Batteries
Abstract
ABSTRACT The electrochemical performance of sodium‐ion batteries (SIBs) cathodes over a wide temperature (WT) range is crucial, but is fundamentally limited by sluggish kinetics and transition metal dissolution under harsh conditions. Herein, a channel structured Prussian blue analog (MnANP‐channel, MAC) featuring unconventional carbon‐nitrogen vacancies (V CN ) was designed via a novel “one‐step” in situ etching strategy. Theoretical calculations and experimental results reveal that V CN enhances the intrinsic affinity for transition metals and accelerates the diffusion kinetics of sodium ions. The channel microstructure maximizes active site utilization and facilitates rapid mass and charge transport at the electrode‐electrolyte interface. This synergistic interplay between the molecular and microscopic scales, creating a unique “dual‐channel” architecture, endows MAC with excellent WT‐range adaptability (103.9, 151.4, and 162.1 mAh/g at −50°C, 25°C, and 50°C, respectively), exceptional rate capability (20 A/g), and remarkable long‐term cycling stability (≈ 6800 cycles). Critically, the MAC//HC full cell exhibits superior energy density (≈ 309 Wh/kg, based on the total mass of the cathode and anode active materials) and wide‐temperature electrochemical performance (−40°C~50°C). Moreover, this versatile synthetic strategy can be extended to diverse PBA compositions (Fe‐, FeCo‐, FeCoMn‐, and FeCoMnNi‐ANP), offering great opportunities for rational construction of advanced architectures with targeted functionalities.
Article Details
Authors (14)
Zhongxin Jing
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Haoyu Zhao
Muhammad Mamoor
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Xiyu He
Key Laboratory of Colloid and Interface Chemistry (Ministry of Education) School of Chemistry and Chemical Engineering Shandong University Jinan China
Lingtong Kong
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Xinnuo Sheng
Key Laboratory of Colloid and Interface Chemistry (Ministry of Education) School of Chemistry and Chemical Engineering Shandong University Jinan China
Dedong Wang
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Lu Wang
Bin Wang
Fengbo Wang
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Guangmeng Qu
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China
Yufei Zhang
Department of Chemistry, Natural Sciences Complex, University at Buffalo, The State University of New York, Buffalo, NY, USA.
Pengtu Zhang
School of Chemical Engineering Shandong Institute of Petroleum and Chemical Technology Dongying China
Liqiang Xu
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Material, Shandong University, Jinan 250100, China