Comparative study of fluoroethylene carbonate and succinic anhydride as electrolyte additive for hard carbon anodes of Na-ion batteries

Sodium difluorophosphate: facile synthesis, structure, and electrochemical behavior as an additive for sodium-ion batteries

“…In the F 1s spectra, the peak appearing around 684 eV is assigned to NaF, a key component of SEI layers formed on the surface of HC electrodes. 1,[74][75][76] The F 1s spectra results further reveal that higher amounts of NaF are present on the SEI formed by NaDFP This journal is © The Royal Society of Chemistry 20xx…”

Nonflammable quasi-solid-state electrolyte for stable lithium-metal batteries

“… 37 Moreover, fluoride plasticizers contribute to in situ formation of robust and homogenous SEI layer on anode, while TEP is decomposed to form interfacial layer that protects the cathode. 38,39 All of these build stable and favorable interfaces, leading to stable cycling of the LMBs at high temperature (60 °C). In addition, pouch batteries with the QCE and LCO (or NMC811) also exhibit relatively stable cycling and can work under abuse conditions such as folding, cutting and nail penetration, revealing good safety of the batteries with QCE.…”

Progress in electrolyte and interface of hard carbon and graphite anode for sodium‐ion battery

“… 35 However, Dugas et al 38 argued that FEC additive was effective in improving the irreversible capacity of the Na‐half battery but had few effects on the improvement of electrochemical performance in full SIBs with HC anode. Kim et al's 36 study confirms that the cycle capacity of symmetric batteries with HC electrodes is not increased by FEC additive, which just improves the cycle performance of Na metal anode and thus reduces the metallic sodium by‐products harmful to HC anodes (Figure 5E). Their study also indicates that succinic anhydride (SA) additive improves the cycle performance of batteries with HC anode at 60°C owing to the formation of SEI with abundant sodium alkyl carbonate/Na 2 CO 3 on the HC surface (Figure 5F–H).…”