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Reversible structural evolution of sodium-rich rhombohedral Prussian blue for sodium-ion batteries

Engineering and Technology

Reversible structural evolution of sodium-rich rhombohedral Prussian blue for sodium-ion batteries

W. Wang, Y. Gang, et al.

Discover how iron-based Prussian blue analogs are revolutionizing sodium-ion batteries with their affordable and efficient performance! This research, conducted by a team of experts including Wanlin Wang and Yong Gang, showcases a new synthesis method that results in superior cycling stability and structural transformation, promising real-world applications.

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Playback language: English
Abstract
Iron-based Prussian blue analogs are promising low-cost and easily prepared cathode materials for sodium-ion batteries. This paper reports a controllable precipitation method to synthesize high-performance Prussian blue for sodium-ion storage. Characterization reveals a rhombohedral structure exhibiting high initial Coulombic efficiency, excellent rate performance, and cycling properties. Synchrotron in situ powder X-ray diffraction shows highly reversible structural transformations between rhombohedral, cubic, and tetragonal structures upon sodium-ion (de)intercalations. Large-scale synthesis yields a material showing stable cycling performance in a pouch full cell over 1000 cycles, suggesting potential for real-world applications in sodium-ion batteries.
Publisher
Nature Communications
Published On
Feb 20, 2020
Authors
Wanlin Wang, Yong Gang, Zhe Hu, Zichao Yan, Weijie Li, Yongcheng Li, Qin-Fen Gu, Zhixing Wang, Shu-Lei Chou, Hua-Kun Liu, Shi-Xue Dou
Tags
sodium-ion batteries
Prussian blue
cathode materials
structural transformations
cycling performance
synthesis method
Coulombic efficiency
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