Solid-state synthesis of β-NaAlO₂ nanoflakes as an anode material for high-performance sodium-ion batteries

Abstract

New anode materials for sodium-ion batteries are being extensively studied to achieve high stability and long cyclability. In this work, we demonstrate the solid-state synthesis of -NaAlO2 nanoflakes as a...

Recent Advances in Sodium-Ion Batteries: Cathode Materials

“…The insertion and desertion of Na ions in the anode and cathode through the electrolyte create and reduce the potential between the two electrodes, corresponding to charge and discharge processes, respectively. Anode materials can also undergo conversion reactions that react with Na ions, forming alloy states that allow high capacities, such as in expanded graphite (284 mAh g −1 ), TiO 2 -based anodes (200-300 mAh g −1 ), antimony sulfides (Sb 2 S 3 ) (730 mAh g −1 ), Sn 4 P 3 (>1100 mAh g −1 ), and phosphorous with a theoretical capacity of ~2596 mAh g −1 , among others [23][24][25][26][27][28][29][30]. However, the development of a sodium cathode continues to present limitations such as an unstable and low capacity of 100-200 mAh g −1 .…”

A Hierarchical Hybrid MXenes Interlayer with Triple Function for Room‐Temperature Sodium‐Sulfur Batteries

“…However, the shuttle effect of soluble sodium polysulfides (Na 2 S 8 , Na 2 S 6 , and Na 2 S 4 ) generated during dischargecharge leads to a loss of active material and unstable cycling performance, which is still challenging to the practical application of RT Na-S batteries. [2][3][4] Different strategies have been reported to alleviate the shuttling of soluble polysulfides in the RT Na-S battery system, including improving the cathode host design to form suitable porous structures for physically trapping the polysulfides, [5][6][7][8][9][10] optimizing liquid electrolytes by using novel additives, applying (quasi-)solid-state electrolytes to reduce the solubility of polysulfides, [11][12][13][14][15][16] and modifying the separator to immobilize polysulfides at the cathode side. [17][18][19][20][21][22][23][24][25] Among these methods, introducing a functional interlayer between the separator and the sulfur cathode (also known as modified separators) is a facile and efficient strategy to suppress the shuttle effect, as it avoids a complicated fabrication process and maintains the energy density of sulfur cathodes.…”