Let's Understand Sodium-ion Batteries
Sodium-ion batteries (SIBs) are emerging as a cost-effective and sustainable alternative to lithium-ion batteries, driven by the abundance of sodium resources and their potential for large-scale energy storage applications. However, challenges such as extended charging times, low energy density, and the need for improved safety have hindered their widespread adoption. Recent advances have sought to address these limitations through innovative materials and design strategies. One significant development is the introduction of amorphous Na-ion conductors based on a dual-anion oxychloride framework (Na2O2–MCly, M = Hf, Zr, Ta), which exhibit remarkable ionic conductivities, mechanical properties, and stability, enabling superior performance in all-solid-state SIBs. Similarly, efforts to enhance fast-charging capabilities of anode materials have focused on improving Na? diffusion kinetics through porous engineering, electrolyte optimization, and pseudocapacitive storage mechanisms. Among these, hard carbon (HC) has gained significant attention due to its low cost and optimal performance, although its initial Coulombic efficiency remains a bottleneck for commercial applications. Among various cathode materials, phosphate-based polyanions have gained significant attention due to their high operating voltage, stable structure, superior safety, and excellent sodium-storage capabilities. The recent advancements in phosphate-based polyanion cathodes, includes orthophosphates, oxyphosphates, pyrophosphates, and mixed phosphates. It also delves into the impact of various modification strategies, such as element doping, surface coating, morphology control, and electrode design, on enhancing the performance of these cathode materials. Collectively, these advances highlight the multifaceted strategies employed to overcome the limitations of SIBs, paving the way for their practical application in energy storage and beyond.
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1. A family of dual-anion-based sodium superionic conductors for all-solid-state sodium-ion batteries.
2. Boosting the Development of Hard Carbon for Sodium-Ion Batteries: Strategies to Optimize the Initial Coulombic Efficiency.?
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3. Fast-Charging Anode Materials for Sodium-Ion Batteries. https://doi.org/10.1002/adma.202404574
4. Recent Development of Phosphate Based Polyanion Cathode Materials for Sodium-Ion Batteries.?
5. Defensive and Ion Conductive Surface Layer Enables High Rate and Durable O3-type NaNi1/3Fe1/3Mn1/3O2 Sodium-Ion Battery Cathode.