Battery knowledge · Manufacturing
Moisture content
The water left in electrodes, separator and electrolyte, measured by Karl Fischer titration and specified in the low hundreds of parts per million or below. Water forms HF with the salt, which attacks the positive electrode and the SEI. [1]
- Also called
- Karl Fischer titration
- Unit
- ppm
Example
Manufacturing: an example situation
An electrode can meet coating mass targets but fail adhesion or moisture checks later.
Read Moisture content alongside Dry room in this context. A production room whose air is kept extremely dry — dew points around −30 °C to −60 °C — so that no moisture reaches the cell while the electrolyte goes in. Water would react with the salt LiPF₆ to form hydrofluoric acid.
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.
References & further reading
Technical references
- 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.