Source link : https://tech365.info/scientists-uncover-key-to-secure-high-performance-and-long-life-sodium-ion-batteries/
Stacking faults in β-NaMnO2 severely cut back their capability throughout charging/discharging cycles. Copper doping successfully eliminates stacking faults, considerably enhancing biking stability, enabling the event of long-lasting sodium-ion batteries. Credit score: Professor Shinichi Komaba, Tokyo College of Science, Japan
Sodium (Na)-ion batteries have just lately emerged as cost-effective and sustainable options to lithium (Li)-ion batteries. Na, the sixth most ample ingredient on Earth, presents decrease materials prices and better availability in comparison with Li-ion batteries.
The design of cathode supplies performs a key function in figuring out battery life and stability. Layered sodium manganese oxide (NaMnO2) has acquired elevated consideration from researchers for its use as a cathode materials in Na-ion batteries.
NaMnO2 exists in two crystal varieties: α-NaMnO2 and β-NaMnO2. The α-phase incorporates a monoclinic layered construction, the place planar MnO2 layers, consisting of edge-sharing distorted MnO6 octahedra, are stacked alternatively with Na-ions in between.
β-NaMnO2, alternatively, options corrugated or zig-zag layers of edge-sharing distorted MnO6 octahedra, additionally with Na-ions in between. Synthesis of β-NaMnO2 usually requires greater temperatures, usually resulting in Na-deficient phases.
Makes an attempt to forestall Na-deficient phases produce nonequilibrium β-phases that exhibit a number of defects….
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Author : tech365
Publish date : 2025-07-17 12:21:00
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