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class="site-inner"><div class="content-sidebar-wrap"><main class="content"><article class="post-559 post type-post status-publish format-standard has-post-thumbnail category-anion-analysis category-battery-material-analysis category-ion-chromatography tag-anion-analysis tag-battery-material-analysis tag-ion-chromatography entry" aria-label="A Powerful Method to Assay Anions in Simulated Lithium-ion Battery Electrolyte Samples Using RFIC"><header class="entry-header"><h1 class="entry-title">A Powerful Method to Assay Anions in Simulated Lithium-ion Battery Electrolyte Samples Using RFIC</h1> <span class="post-info-author"> By <a href="https://www.thermofisher.com/blog/analyteguru/tf-author/analyteguru-staff/" title="Posts by AnalyteGuru Staff" rel="author">AnalyteGuru Staff, </a> </span> <span class="post-info-date"> 12.02.2022 </span> </header><div class="entry-content"><div class="lia-message-body-content"> <p><img decoding="async" class="aligncenter size-full wp-image-11548" src="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2023/06/19736-og-1.jpg" alt="" width="998" height="634" srcset="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2023/06/19736-og-1.jpg 998w, https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2023/06/19736-og-1-300x191.jpg 300w, https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2023/06/19736-og-1-768x488.jpg 768w" sizes="(max-width: 998px) 100vw, 998px" /></p> <p>The <a href="https://www.marketsandmarkets.com/Market-Reports/lithium-ion-battery-market-49714593.html?gclid=CjwKCAiA68ebBhB-EiwALVC-NrfYNVjjzFeOTqLnYqp8L8uNMlbUEZsP_1QSNu_ksPmYgVVNMTcyGhoCuBQQAvD_BwE" target="_blank" rel="noopener nofollow noreferrer">higher adoption of lithium-ion batteries</a> in the renewable energy sector and plug-in vehicles is driving growth of that market. Moreover, advancement in lithium-ion battery technology — which has increased the focus of R&D and rising adoption of lithium-ion batteries in various new applications due to declining prices — is also expected to drive the growth of the market in the near future.</p> <p>For battery production facilities it is considered good practice to analyze the electrolytes for material purity and trace contaminant analysis species, such as anions, cations and organic acids. The preferred technique for analysis of incoming raw material and final QA/QC product testing is <a href="https://www.thermofisher.com/us/en/home/industrial/chromatography/ion-chromatography-ic/ion-chromatography-systems/instrument-selection/ics-6000.html" target="_blank" rel="nofollow noopener">ion chromatography (IC)</a>.</p> <p>The electrolyte solution in these batteries consists of a lithium salt in an organic solvent. Commonly used salts are lithium hexafluorophosphate (LiPF₆), lithium perchlorate (LiClO₄), lithium tetrafluoroborate (LiBF₄), lithium hexafluoroarsenate (LiAsF₆), lithium hexafluorosilicate (LiSiF₆) and lithium tetraphenylborate (LiB(C₆H₅)₄).</p> <p>The electrolyte in lithium batteries may have a mixture of these lithium salts in organic solvents. The electrolyte’s concentration in the solvent ranges from 0.1 to 2 mol/L, with an optimal range of 0.8–1.2 mol/L. The anions of the added lithium salts can be determined by IC to ensure that the solutions have been prepared at the proper concentrations.</p> <p>In a recent Thermo Fisher Scientific study, the authors prepared simulated samples containing either lithium tetrafluoroborate, lithium perchlorate or lithium hexafluorophosphate in an equal mixture of ethylene carbonate, diethyl carbonate and propylene carbonate, and demonstrated that the anionic content can be determined accurately using a Reagent-Free™ IC (RFIC™) system. The RFIC system allows the analyst to avoid the problems encountered in eluent preparation. The RFIC system also delivers excellent retention time reproducibility for easy and reproducible quantification in the analysis of lithium-ion battery electrolyte solutions.</p> <p>Figure 1 shows the separation of three mixed standard solutions (used for method calibration) of the three analytes of interest: perchlorate, tetrafluoroborate and hexafluorophosphate. The three anions were well-separated in about 25 minutes, with the first analyte, tetrafluoroborate, eluting at about 13 minutes. The first 12 minutes of the separation were included to allow most common inorganic anions to elute so that they did not interfere with the determination of the three analytes. Tetrafluoroborate eluted between sulfate and phosphate, while perchlorate and hexafluorophosphate eluted after phosphate. Table 1 shows the calibration information for each analyte.</p> <h3 id="toc-hId-1154441939"><strong>Results</strong></h3> <p><strong><span class="lia-inline-image-display-wrapper lia-image-align-center" style="width: 281px"><span class="lia-inline-image-caption"><img decoding="async" class="aligncenter wp-image-13865 size-full" src="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Figure-1-Chromatogram-overlay.png" alt="" width="281" height="390" srcset="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Figure-1-Chromatogram-overlay.png 281w, https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Figure-1-Chromatogram-overlay-216x300.png 216w" sizes="(max-width: 281px) 100vw, 281px" />Figure 1: Overlay of chromatograms of the calibration standards.</span></span></strong></p> <p><strong><span class="lia-inline-image-display-wrapper lia-image-align-center" style="width: 553px"><span class="lia-inline-image-caption"><img loading="lazy" decoding="async" class="aligncenter size-full wp-image-13867" src="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Table-1-Analyte-calibration-information.png" alt="" width="553" height="138" srcset="https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Table-1-Analyte-calibration-information.png 553w, https://www.thermofisher.com/blog/analyteguru/wp-content/uploads/sites/25/2022/12/121222-Table-1-Analyte-calibration-information-300x75.png 300w" sizes="(max-width: 553px) 100vw, 553px" />Table 1: Calibration information for each analyte.</span></span></strong></p> <h3 id="toc-hId-2041945620"><strong>Conclusion </strong></h3> <p>This application demonstrates an IC method that uses an RFIC system to easily assay the anions in the simulated lithium-ion battery electrolyte samples. The results show that this method is both accurate and reproducible.</p> <h3 id="toc-hId--1365517995"><strong>Additional Resources</strong></h3> <p>To learn more about the study, read this <a href="https://assets.thermofisher.com/TFS-Assets/CMD/Application-Notes/AN-258-IC-Salts-Lithium-Ion-Battery-AN70399-EN.pdf" target="_blank" rel="nofollow noopener">application note.</a></p> <p>For additional resources, go to our battery manufacturing <a href="https://www.thermofisher.com/us/en/home/industrial/manufacturing-processing/battery-manufacturing.html?cid=fl-cmd-liionbatteries" target="_blank" rel="nofollow noopener">page</a>.</p> </div> </div></article><section class="author-box"><h4 class="author-box-title">AnalyteGuru Staff</h4><div class="author-box-content" itemprop="description"></div></section><div class="adjacent-entry-pagination pagination"><div class="pagination-previous alignleft"><i class="fa fa-icon fa-chevron-left"></i> <a href="https://www.thermofisher.com/blog/analyteguru/helping-laboratories-work-toward-sustainability/" rel="prev">Helping Laboratories Work Toward Sustainability</a></div><div class="pagination-next alignright"><a href="https://www.thermofisher.com/blog/analyteguru/accelerated-solvent-extraction-and-evaporation-method-for/" rel="next">Accelerated Solvent Extraction and Evaporation Method for Determination of PCBs in Soil</a> <i class="fa fa-icon fa-chevron-right"></i></div></div></main></div></div><footer class="site-footer"><div class="wrap"><div class="creds"><p class="footer-links"><a href="https://corporate.thermofisher.com/en/footer/privacy-statement.html" target="_blank" rel="noopener noreferrer">Privacy Statement</a><a href="https://corporate.thermofisher.com/en/footer/terms-and-conditions.html" target="_blank" rel="noopener noreferrer">Terms & Conditions</a><a href="/blog/locations/">Locations</a><a href="/blog/sitemap/">Sitemap</a></p><p>© 2024 <a href="https://www.thermofisher.com">Thermo Fisher Scientific</a>. 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