Effect of vinylene carbonate electrolyte additive and battery cycling protocol on the electrochemical and cyclability performance of silicon thin-film anodes

Recent Progress on Electrolyte Boosting Initial Coulombic Efficiency in Lithium‐Ion Batteries

“…[ 20 ] Salah's group revealed the VC‐containing electrolyte can improve the ICE (78% versus 74% for VC‐free electrolyte) and capacity retention (63% versus 15% for VC‐free electrolyte) of amorphous Si films. [ 56 ] Noticeably, the effect of VC and FEC on the electrochemical performance of Li 4 Ti 5 O 12 electrode in TEP‐based electrolyte was revealed by Wang's group. [ 38 ] It was found that the VC is beneficial for achieving a high ICE, but the FEC supports good cycling stability.…”

Effects of Butadiene Sulfone as an Electrolyte Additive on the Formation of Solid Electrolyte Interphase in Lithium-Ion Batteries Based on Li4Ti5O12 Anode Materials

“…In recent years, many researchers have tried to improve SEI film properties by using metal oxide materials, such as Al 2 O 3 [18][19][20], ZrO 2 [21][22][23], and AlF 3 , deposited on the electrode surface, or by using an electrolyte additive, such as vinylene carbonate (VC) [24,25], butyl sultone [26,27], and propane sultone (PS) [28,29], dissolved in the electrolyte system. In most cases, vinyl-and oxy-group such as VC can enhance electrochemical performances such as the cycle stability and capacity utilization of LIBs [30].…”

Molecular Design of Film-Forming Additives for Lithium-Ion Batteries: Impact of Molecular Substrate Parameters on Cell Performance

“…VC is an additive known to form a passivating film that is relatively thick, minimizing active lithium losses and electrolyte consumption upon cycling. 44,45 One drawback however is that VC-derived SEI layers are very resistive, leading to Li plating on the electrode surface. 43,46−48 Further, the SEI is not able to withstand the volumetric changes caused by lithiation of Si due to the rigidity of the poly(VC) species.…”

“…A variety of techniques are commonly used to characterize SEI components. , Among these, mass spectrometric techniques like secondary ion mass spectrometry (SIMS), laser desorption/ionization mass spectrometry (LDI-MS), and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) are well suited to elucidate the composition and molecular structure of SEI components. − , MALDI-MS and LDI-MS can detect intact oligo- and polymers and allow evaluation of their size and the lateral distribution on electrode surfaces. Consequently, molecular analysis of the formed SEI using LDI-MS enables the implementation of additional criteria for additive evaluation, like polymer size and homogeneity of the formed film. − , Previous works focused on reductive components such as a vinyl group, isocyanate, or fluorine-containing molecules to enhance the formation of lithium fluoride inside the cell. − Ideally, film-forming additives prevent the reductive decomposition of ethylene carbonate (EC), a benchmark electrolyte component, at ≈0.8 V vs Li|Li + and therefore prevent/suppress the electrolyte from being excessively consumed. One well-known representative is vinylene carbonate (VC) which is a state-of-the-art additive that is commonly used to achieve exceptional lifetime while using graphite or Si-based anodes.…”

“…One well-known representative is vinylene carbonate (VC) which is a state-of-the-art additive that is commonly used to achieve exceptional lifetime while using graphite or Si-based anodes. VC is an additive known to form a passivating film that is relatively thick, minimizing active lithium losses and electrolyte consumption upon cycling. , One drawback however is that VC-derived SEI layers are very resistive, leading to Li plating on the electrode surface. ,− Further, the SEI is not able to withstand the volumetric changes caused by lithiation of Si due to the rigidity of the poly­(VC) species. For Si-rich anode systems, improvement of these additive properties is therefore crucial.…”