Electrolyt silicon based anode

Electrolytes for silicon based anodes

Electrolyte salt: Combination of LiPF6 with lithium imide salts (and appropriate additives depending on the application)

Solvent: Carbonate-based solvents i.e. EC, EMC, FEC (solvent type and composition is discussable upon application)

Example composition: 0.8 M LiPF6+ 0.2 M LiFSI dissolved in EC:EMC (3:7, w:w)+10% FEC

Batch size: 25 g- 20 kg (larger amounts available upon request)

Packaging:

  • Our electrolytes come in UN-certified aluminum transport bottles (made in Germany), which are wrapped in pouch bags sealed under an inert gas atmosphere
  • Pouch bags are shipped in UN-approved cardboard boxes suitable for the transportation of dangerous goods (in compliance with ADR).

Delivery time: max. 14 days within the EU

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Characteristics of electrolytes for silicon based anodes

Silicon is currently considered as the most promising negative electrode material for next-generation high-energy lithium-ion batteries due to its high volumetric (9786 mAh cmSi-3) and gravimetric capacity (3580 mAh gSi-1) on the electrode level besides its economic feasibility and abundance. The major obstacles hindering the practical application of Si negative electrodes are the insufficient cycle life caused by enormous volumetric changes of Si electrode and continuous breakage/reformation of the solid electrolyte interphase in every cycle due to continuous decomposition of electrolyte on the Si electrode.

Application fields of electrolytes for silicon based anodes

Our electrolytes for silicon-based negative electrodes are designed to enable an extended cycle life via formation of a highly efficient solid electrolyte interphase, which is flexible enough to withstand the expansion/shrinkage of the silicon particles, significantly reducing the irreversible consumption of lithium (Li+) ions and the electrolyte. The electrolyte formulations contain optimized combinations of salt and solvent mixtures combined with film-forming additives that work synergistically. The electrolytes are suitable for pure silicon electrodes as well as silicon suboxides (SiOx with x≈1) containing electrodes and silicon/graphite blends.