Highly stable linear carbonate-containing electrolytes with fluoroethylene carbonate for high-performance cathodes in sodium-ion batteries

Ultraconcentrated Sodium Bis(fluorosulfonyl)imide-Based Electrolytes for High-Performance Sodium Metal Batteries

“…[20][21][22][23][24][25][26][27] Nevertheless, the practical application of Na metal batteries is quite challenging because the high chemical and electrochemical reactivity of Na metal electrodes with organic liquid electrolytes leads to low Coulombic efficiencies and limited cycling performance. 20,[24][25][26] Severe electrolyte decomposition at the Na metal electrode results in the formation of a resistive and non-uniform surface film, leading to dendritic Na metal growth. To control the Na metal electrode-electrolyte interface for high performance Na metal batteries, considerable efforts have been made to find electrolyte systems that are stable at the Na metal electrode.…”

“…To control the Na metal electrode-electrolyte interface for high performance Na metal batteries, considerable efforts have been made to find electrolyte systems that are stable at the Na metal electrode. 20,21,[23][24][25][26] The use of linear carbonates such as dimethyl carbonate (DMC), which are widely used as electrolyte solvents in lithium batteries, is limited due to their drastic decomposition at Na metal electrodes and sodiated hard carbon anodes. 24,27 Using fluoroethylene carbonate (FEC) as an electrolyte additive for in situ formation of an artificial solid electrolyte interphase (SEI) layer could stabilize the anode-electrolyte interface ( Figure 2).…”

“…20,21,[23][24][25][26] The use of linear carbonates such as dimethyl carbonate (DMC), which are widely used as electrolyte solvents in lithium batteries, is limited due to their drastic decomposition at Na metal electrodes and sodiated hard carbon anodes. 24,27 Using fluoroethylene carbonate (FEC) as an electrolyte additive for in situ formation of an artificial solid electrolyte interphase (SEI) layer could stabilize the anode-electrolyte interface ( Figure 2). 22,24,26 However, the FEC-derived SEI acted as a resistive layer, impeding the sodiation-desodiation process and reducing the reversible capacity of the anodes.…”

“…24,27 Using fluoroethylene carbonate (FEC) as an electrolyte additive for in situ formation of an artificial solid electrolyte interphase (SEI) layer could stabilize the anode-electrolyte interface ( Figure 2). 22,24,26 However, the FEC-derived SEI acted as a resistive layer, impeding the sodiation-desodiation process and reducing the reversible capacity of the anodes. 22 Finding new electrolyte systems that are stable at the Na metal electrode and possess high oxidation durability at high-voltage cathodes is necessary for the development of high-performance Na metal batteries.…”

Thermal Analysis on Na Plating in Sodium Ion Battery

“…Thus, the purpose of this work is to investigate the thermal reactivity of lithium or sodium plating itself. Also, in order to clarify the role of solid electrolyte interface (SEI), 10,11 the relationship of the SEI composition and the thermal reactivity of metal plating is presented. .…”