Highly Synergistic Physicochemical Constraints of NaBr@Carbonized ZIF-8 Cathode Enable Efficient and Stable Sodium-Ion Storage

TY - JOUR

T1 - Highly Synergistic Physicochemical Constraints of NaBr@Carbonized ZIF-8 Cathode Enable Efficient and Stable Sodium-Ion Storage

AU - Yu, Chuguang

AU - Guo, Jingze

AU - Zhang, Junfan

AU - Yuan, Yue

AU - Yang, Kaijie

AU - Zhang, Xiaoyan

AU - Li, Quan

AU - Wang, Jing

AU - Wu, Feng

AU - Tan, Guoqiang

N1 - Publisher Copyright: © 2026 The Author(s). Carbon Neutralization published by Wenzhou University and John Wiley & Sons Australia, Ltd.

PY - 2026/3

Y1 - 2026/3

N2 - Suppressing the shuttle effect of bromine is essential for achieving high-energy-density long-cycle brominated sodium-ion batteries. Here, we propose a synergistic constraint strategy that combines physical confinement and chemical adsorption and design a NaBr@carbonized ZIF-8 cathode architecture via a simple NaBr dissolution-adsorption-recrystallization process. The obtained structure features abundant NaBr nano-crystallines uniformly embedded within carbonized ZIF-8 frameworks, forming a multi-core encapsulated composite. Systematic studies disclose synergistic physical and chemical interactions between NaBr and carbonized ZIF-8. Compact physical confinement alleviates volume change and electrolyte erosion, and robust chemical adsorption facilitates fast electron and ion transport and also stabilizes bromine active species. Owing to the improvement in the electrical, chemical, and volumetric properties, the composite design enables promising electrochemical performance, including a high reversible capacity of 254 mAh g−1 at 1 C, an excellent rate capability of 148 mAh g−1 at 10 C, and an outstanding capacity retention of 86% after 1000 cycles at 10 C. A synergistic physicochemical constraint strategy offers a promising pathway toward durable, high-performance Na–Br batteries, underscoring their potential for large-scale energy storage applications.

AB - Suppressing the shuttle effect of bromine is essential for achieving high-energy-density long-cycle brominated sodium-ion batteries. Here, we propose a synergistic constraint strategy that combines physical confinement and chemical adsorption and design a NaBr@carbonized ZIF-8 cathode architecture via a simple NaBr dissolution-adsorption-recrystallization process. The obtained structure features abundant NaBr nano-crystallines uniformly embedded within carbonized ZIF-8 frameworks, forming a multi-core encapsulated composite. Systematic studies disclose synergistic physical and chemical interactions between NaBr and carbonized ZIF-8. Compact physical confinement alleviates volume change and electrolyte erosion, and robust chemical adsorption facilitates fast electron and ion transport and also stabilizes bromine active species. Owing to the improvement in the electrical, chemical, and volumetric properties, the composite design enables promising electrochemical performance, including a high reversible capacity of 254 mAh g−1 at 1 C, an excellent rate capability of 148 mAh g−1 at 10 C, and an outstanding capacity retention of 86% after 1000 cycles at 10 C. A synergistic physicochemical constraint strategy offers a promising pathway toward durable, high-performance Na–Br batteries, underscoring their potential for large-scale energy storage applications.

KW - NaBr

KW - Na–Br battery

KW - ZIF-8

KW - physicochemical constraint

KW - synergistic effect

UR - https://www.scopus.com/pages/publications/105031592834

U2 - 10.1002/cnl2.70136

DO - 10.1002/cnl2.70136

M3 - Article

AN - SCOPUS:105031592834

SN - 2769-3333

VL - 5

JO - Carbon Neutralization

JF - Carbon Neutralization

IS - 2

M1 - e70136

ER -