DataVXAdvanced Energy MaterialsPaper
journal article·2025-11

Unraveling the Roles of Self‐Converted Interphase and Capacity Sites in Facilitating High‐Flux Ion Transport for Prussian Blue Analogs Cathodes

By Ketong Chen, Yadan Xie, Weijian Li, Tianqi Yang, Shenghui Shen, Yi Dong, Bingbao Mei, Jiayuan Xiang, Xinyi Gu, Lingjie Zhang, Yongfeng Yuan, Minghua Chen, Wangjun Wan, Chen Wang, Ningzhong Bao, Xinhui Xia

Advanced Energy Materials· Volume 15· Issue 42
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Source abstract

Abstract

Abstract Regulation of ion transport at the reaction interface of electrodes is essential for the design and development of high‐rate sodium‐ion batteries. Herein, a controlled self‐converted strategy is reported to construct iron oxides (Fe x O y ) ion‐regulated interphase on Fe‐based Prussian blue analogs (FePBAs) via a facile etching method in acetic acid media. Notably, this process simultaneously triggers an unexpected increase in sodium–ion storage sites within the bulk FePBAs. Uniquely, the designed Fe x O y interphase modulates the local solvation structure, restructures the Helmholtz layer, and thereby establishes a stable and uniform cathode‐electrolyte interphase to facilitate high‐flux ion transport. Meanwhile, increased sodium‐ions in the bulk phase will also boost ion transport flux by establishing a concentration gradient driving force between the electrolyte and the bulk lattice. The synergistic effect between Fe x O y interphase and increased bulk sites enhances ion transport kinetics through accelerated adsorption‐desolvation‐diffusion cascades, and finally achieves high‐flux ion transport (0.0854 mol m 2 h −1 ), superior to the pristine counterpart (0.0694 mol m −2 h −1 ). Consequently, the modified FePBAs cathodes exhibit exceptional rate capability and extraordinary long‐term cycling stability, retaining 80% capacity after 5000 cycles at 5 C. This work sets a new paradigm on interface/site engineering for the construction of high‐power energy storage systems.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and & Engineering Zhejiang Sci‐Tech University Hangzhou 310018 P. R. China

College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China

Zhejiang Baima Lake Laboratory Co., Ltd Hangzhou 310051 P. R. China

Department of Physics City University of Hong Kong Hong Kong 999077 P. R. China

Narada Power Source Co. Ltd. Hangzhou 310014 P. R. China

State Key Laboratory of Materials‐Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China

Key Laboratory of Engineering Dielectric and Applications School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin 150080 P. R. China

Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201800 P. R. China

State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou Zhejiang 310058 P. R. China

School of Engineering Hangzhou City University Hangzhou Zhejiang 310015 P. R. China

College of Machinery Engineering Zhejiang Sci‐Tech University Hangzhou 310018 P. R. China

Zhejiang Academy of Science and Technology for Inspection & Quarantine Hangzhou 311215 P. R. China

Funding

Natural Science Foundation of Zhejiang Province · National Natural Science Foundation of China · Science and Technology Department of Zhejiang Province

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