Liquid electrolytes have an important role in battery performance and longevity. The electrolyte fluid in lithium-ion batteries enables effective intercalation of lithium ions between the electrodes. As a result, the quality of the electrolyte is critical, as contaminants can impair the operation and safety of the energy storage device.
Simon Taylor, Segment Business Development Manager at METTLER TOLEDO, a global supplier of precision instruments and services, says, "Rechargeable batteries have become an indispensable component in many industries, including automotive, aerospace, and energy storage.”
“Their long-term performance and stability are critical factors in determining the efficiency and reliability of these applications. To optimize battery design and performance, manufacturers need accurate and precise analytical tools to measure and analyze various chemical and physical properties. UV/Vis spectroscopy is one such tool that can provide valuable insights into product performance and lifetime.”
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Fast and Reliable Electrolyte Testing
Ultraviolet-visible (UV/Vis) spectroscopy is a widely used technique in a variety of fields, including bacterial culturing, drug identification, and chemical research. It is also used for quality control in the beverage industry and, in this case, for analyzing the performance and lifetime of lithium-ion batteries used in electric vehicles.
The technique determines how many discrete wavelengths of UV or visible light are absorbed or transmitted through a sample in contrast to a reference or blank sample.
METTLER TOLEDO's compact UV/Vis spectrophotometers enable users to conveniently, rapidly, and cost-effectively assess the compatibility of electrolyte solutions. Built-in reference color scales provide ready-to-use results, and a color guide and webinar help you get started.
Taylor continued: “UV/Vis spectroscopy is a versatile technique that lends itself well to a multitude of analyses – from testing metal ion purity of raw materials to predicting electrolyte stability and performance ensuring compliance with wastewater regulations.”
“Its capability to provide accurate and precise measurements of chemical and physical properties is the reason why battery scientists trust spectroscopic techniques in quality control.”
The company's EasyPlus UV/VIS spectrophotometer provides a simple and cost-effective way to analyze electrolyte solutions. The sensor detects electrolyte contaminants in seconds without requiring time-consuming sample preparation.
The spectrophotometer's built-in reference color scales detect deviations by comparing the electrolyte's measured color value to previously saved color reference scales.
It also determines the amount of UV and visible light absorbed or transmitted by the irradiated electrolyte solution, indicating sample cleanliness. Both strategies give the buyer rapid clarity.
Predict Battery Lifetime
UV/Vis spectrophotometry helps investigate the steady loss in battery performance, also known as battery deterioration. A reference curve is constructed by recording changes in the electrolyte's absorption spectrum over time.
As the battery ages and its performance deteriorates, the stored electrolyte is measured and compared to a reference curve to evaluate the degree of degradation. This helps engineers to more accurately anticipate the battery's life.
Taylor adds: “At METTLER TOLEDO, we recognize the critical importance of predicting battery life for the development of future zero emission vehicles, the development of renewable energy technology, and balancing energy needs through Battery Energy Storage Systems (BESS).”
“Our UV/VIS spectrophotometers offer exceptional flexibility, accuracy and precision allow battery manufacturers to predict and optimize battery performance, ensuring the safety of those batteries, and driving innovation in battery technologies."
Multi-Parameter Analysis
Engineers may successfully automate their analyses with UV/VIS Excellence instruments from METTLER TOLEDO, which include a cuvette changer and an autosampler.
A multi-parameter system with titration and pH measurements can help increase production. Engineers can improve their analytical efficiency while saving time during documentation and reporting.
Overall, the quality of liquid electrolytes is crucial to the performance and safety of lithium-ion batteries, particularly given their usage in important industries, such as automotive, aerospace, and renewable energy.
UV/Vis spectroscopy from METTLER TOLEDO is a powerful tool for measuring electrolyte purity and stability. It allows manufacturers to make more informed decisions to improve battery design and longevity.
The EasyPlus UV/VIS spectrophotometer simplifies testing by providing quick and reliable findings critical for monitoring battery degeneration and estimating lifespan.
Its adaptability also extends to wastewater analysis, enabling producers to verify environmental compliance throughout battery manufacturing.
When engineers use advanced analytical tools to automate their processes, they improve efficiency and contribute to ongoing innovation in battery technologies. This leads to safer, more reliable, and sustainable energy storage solutions.
UV/Vis spectrophotometers provide accurate and precise measurements of electrolyte solutions. Image Credit: Mettler-Toledo GmbH
This information has been sourced, reviewed, and adapted from materials provided by Mettler-Toledo GmbH, Analytical.
For more information on this source, please visit METTLER TOLEDO