Advanced electrolyte systems with additives for high-cell-voltage and high-energy-density lithium batteries

Abstract

As battery-powered electric vehicles and other power equipment put forward higher requirements for long recharge mileage, developing high performance lithium batteries (LBs) has becoming necessary. One of the effective ways...

Synergy of Cu-foam/Sb2O3/rGO for stable potassium anodes of high-rate and low-temperature potassium metal batteries

“…[1][2][3] Lithium-ion batteries (LIBs) are the choice for such electric vehicle applications mainly due to their relatively high energy/power densities, long cycle life, and lack of memory effects. [4][5][6][7][8][9][10] However, the low earth abundance of lithium and its high price can limit the widespread and sustainable application of LIBs in electric vehicles. Therefore, exploring affordable alternatives such as sodium and potassium and the corresponding batteries is denitely needed.…”

Unprotected Organic Cations─The Dilemma of Highly Li-Concentrated Ionic Liquid Electrolytes

“…Lithium-ion batteries (LIBs) have emerged as the leading technology in secondary batteries, owing to their exceptional electrochemical performance and well-established technologies. − As a crucial component of electrochemical energy storage devices, the electrolyte selected for LIBs necessitates a stable electrochemical potential windowtypically determined by its oxidation and reduction potentials, to enable high operating voltages and, consequently, high energy densities. , It is worth noting that the performance of LIBs is also closely linked to the different liquid environments established during electrolyte development due to their significant impact on the interfacial properties. − Recently, increasing the concentration of Li salts in the solvents (nonaqueous and aqueous) has been intensively pursued as a strategy for enhancing and differentiating the electrochemical properties of electrolytes. − These highly concentrated electrolytes have been found to offer electrochemical advantages by reducing the number of solvating molecules. For instance, the first solvation of the Li + ion sheath in highly concentrated electrolytes harbors more anions than their diluted counterparts, forming abundant ion pairs such as contact ion pairs and aggregates (commonly referred to as CIP and AGG, respectively) .…”

Diphenylphosphoryl Azide as a Multifunctional Flame Retardant Electrolyte Additive for Lithium-Ion Batteries

“…The accumulated "dead lithium" and the electrolyte carry out a parasitic side reaction, resulting in irreversible SEI destruction [14][15][16][17]. Electrolyte is the blood of LIBS; the carbonate electrolyte is commonly used in commercial LIBS [18]. However, the low flash point and high flammability of commercial electrolytes are major factors contributing to lithium battery safety accidents [19,20].…”