Wetting

Example

Use in Lemonergy

Place operations and quality checks in process order.

This is a reference concept. No executable Lemonergy block has been verified for this term.

Learn it in Lesson 3 · Cell production →

Connected concepts

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

Electrolyte dry-out

Loss of liquid electrolyte to decomposition and film growth until parts of the electrode are no longer wetted. It appears late in life as a sudden rise in resistance, and is one cause of the knee in a capacity curve.

Electrolyte filling

Injecting a measured volume of electrolyte into the sealed-but-for-one-opening cell, usually under vacuum followed by pressure so the liquid is pulled into the pores. The cell then rests for wetting before formation.

Formation

The first controlled charge and discharge cycles of a newly assembled cell, during which the SEI forms. It is part of cell production, before aging and grading.

Porosity

The fraction of a layer’s volume that is empty space. In a lithium-ion electrode the pores — roughly 20–35 % of the volume after calendering — are filled with electrolyte, which carries ions to the particles.

Ultrasonic cell testing

Sending ultrasound pulses through a cell and tracking how their travel time and amplitude change. Electrode stiffness and density shift with lithiation, so the signal follows state of charge, while gas pockets and dry regions block sound — making it a way to map electrolyte wetting after filling and to detect gassing and lithium plating.

References & further reading

Technical references

1. Current and future lithium-ion battery manufacturing

   Yangtao Liu, Ruihan Zhang, Jun Wang, Yan Wang · iScience · 2021

   Technical reference · Electrode preparation, cell assembly, formation and manufacturing trade-offs.