| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
2021 Undergraduate Student Poster Contest
|
| Presentation Title |
Highly Crystallized Prussian Blue with Enhanced Kinetics for Highly Efficient Sodium Storage |
| Author(s) |
Ruixuan Jiang, Mingsheng Qin |
| On-Site Speaker (Planned) |
Ruixuan Jiang |
| Abstract Scope |
Prussian blue analogs (PBAs) featuring large interstitial voids are broadly recognized as promising cathode materials for sodium-ion batteries. Nevertheless, the conventionally prepared PBAs inevitably suffer from inferior crystallinity and lattice defects, leading to low specific capacity, poor rate capability, and unsatisfied long-term stability. Herein, a chemical inhibition strategy is developed to prepare a highly crystallized Prussian blue (Na2Fe4[Fe(CN)6]3), which displays an outstanding rate performance (78 mAh g-1 at 100 C) and long life-span properties (62% capacity retention after 2000 cycles) in sodium storage. Experimental results demonstrate the efficient electron transfer and smooth ion diffusion within the bulk phase of highly crystallized Prussian blue. Moreover, in situ testing results demonstrate the robust crystalline framework and reversible phase transformation within the charging−discharging process. This research work provides an innovative way to optimize PBAs for advanced rechargeable batteries from the perspective of crystallinity. |