Laboratory and industrial solutions support lithium-ion battery development and production, from components testing to final battery quality control.
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Competence Guide: Production and Quality Control of Lithium-Ion Batteries |
The increasing market for portable electronic devices and electric vehicles (EV) has led to a strong demand for rechargeable batteries. Lithium-ion batteries (LiBs) are the current state-of-the-art in this technology, since this battery type is characterized by high energy density, low self-discharge rate, and good cycle durability. The strong demand for LiBs leads to a high production pace, while quality standards have to be fulfilled during the whole production process. As a consequence, analytical techniques and physical methods are crucial and play a key role in the production process for the characterization of LiBs.
METTLER TOLEDO offers you a comprehensive portfolio of analytical solutions for the content determination and characterization of lithium-ion battery components. This Competence Guide illustrates a selection of different analytical techniques.
Analytical Methods in the Production and Quality Control of Lithium-Ion Batteries
Besides a brief overview, this guide will focus on the following methods:
- Water content by Karl Fischer Titration:
Water reacts with the liquid electrolyte in a lithium-ion battery to produce aggressive degradation products affecting all components. This makes thorough testing for water essential for quality purposes. - Titrations and direct measurements:
The content of metal ions such as cobalt, nickel, manganese and copper can be determined by titration methods, in addition to direct potentiometric measurements for, e.g., fluoride content determinations. - UV/Vis spectrophotometry:
Color measurement and content determinations of metal ions are the main applications performed. - Density measurements:
The characterization of the components and raw materials in the production of LiBs include the density determination of liquid materials, as well as of the electrolyte. - Multiparameter workflow:
Several techniques can be combined and fully automated in a single analytical workflow: density, refractive index and color of liquid samples are determined in a single run. Additionally, also pH and conductivity measurements can be performed and automated in the same workflow.
| Components | Battery materials | Analysis | Instruments |
| Anode |
|
| |
| Electrolyte |
|
| GT Titrators pH-meters Conductivity meters |
| Separator |
|
| KF Titrators |
| Cathode |
|
| GT Titrators DE/RE instruments Ion-meters |
Table: Analysis methods for the main components of lithium-ion batteries.
