Lithium bis(fluorosulfonyl)imide

Example

Use in Lemonergy

Connect transport with electronic isolation.

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Connected concepts

Related concepts from the knowledge graph. Connections show context, not cause and effect. Hover or focus a linked term for its definition.

Fast charging

Charging intended to replenish a specified amount of energy or state of charge in a short time. There is no universal C-rate threshold: performance depends on cell chemistry, temperature, starting state and power limits. High current can increase heating and lithium-plating risk, requiring appropriate limits.

Lithium hexafluorophosphate

The lithium salt in nearly every commercial electrolyte, chosen for conductivity, aluminium passivation and cost rather than stability: it decomposes above about 60 °C and reacts with water to form HF.

Lithium bis(trifluoromethanesulfonyl)imide

A very stable imide salt used in polymer and solid-state electrolytes and in research cells. Like LiFSI it attacks aluminium current collectors above about 3.7 V, which keeps it out of mainstream liquid cells.

Lithium salt

The dissolved salt that supplies the mobile lithium ions in a liquid electrolyte, almost always lithium hexafluorophosphate, LiPF₆, at about one mole per litre. It reacts with traces of water to form hydrofluoric acid, which is why cells are filled in a dry room.

References & further reading

Technical references

1. Electrolytes and Interphases in Li-Ion Batteries and Beyond

   Kang Xu · Chemical Reviews · 2014

   Technical reference · Electrolyte salts, solvents, additives and electrode interphases.