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- Title
Structurally Stable, Low H<sub>2</sub>O Prussian Blue Analogs toward High Performance Sodium Storage.
- Authors
Gao, Yuting; Wu, Xingxing; Wang, Li; Zhu, Yaofeng; Sun, Guoxing; Tang, Yuxin; Yan, Mi; Jiang, Yinzhu
- Abstract
Prussian blue analogues (PBAs) are recognized as promising cathode materials for sodium‐ion batteries (SIBs) due to their facile synthesis, low‐cost, high capacity, and environmental friendliness. However, high water content (>10 wt%) in the framework and unsatisfactory structural stability of PBAs are still the bottlenecks for industrial applications. Herein, interstitial K‐doping is employed to minimize the interstitial water and enhance the structural stability of Na2‐xFeMn[Fe(CN)6] (FeMnPBA), thereby boosting the sodium storage performance. The 3% K‐doping (K‐FeMnPBA3) demonstrates a much‐reduced water content of 6.9%, accompanied by a notably enhanced capacity of 139.1 mAh g−1 at 100 mA g−1 and a remarkable capacity retention of 77.1% after 700 cycles. Furthermore, the K‐FeMnPBA3/hard carbon (HC) pouch cell achieves a stable cyclability with 82.6% capacity retention after 600 cycles. This research offers valuable insights into low‐water PBAs for practical applications in SIBs.
- Subjects
STRUCTURAL stability; PORE water; SODIUM; PRUSSIAN blue; SODIUM ions; STORAGE
- Publication
Advanced Functional Materials, 2024, Vol 34, Issue 22, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202314860