Fluorinated materials enable safer, lighter, longer-lasting Lithium-ion (Li-ion) batteries to meet the demand for optimized electric vehicles and faster electronics. Different classes of fluorochemicals provide unique benefits and can be used in specially formulated combinations to deliver the results desired in today’s advanced Li-ion batteries. Halocarbon Electronic Solutions (HES), as a global leader in large-scale specialty fluorochemistry, partners with Li-ion battery producers to formulate innovative fluorochemical solutions that enhance the safety and performance of high-voltage Li-ion batteries.
Fluorinated materials make numerous improvements in the performance of Li-ion battery including:
High-Voltage Stability & Performance
HES offers commercially ready solutions to enhance the safety and performance of high-voltage NMC cathodes in the Li-ion battery. These fluorine-based additives and co-solvents provide high-performance Li-ion batteries with greater stability at voltages > 4.2V. Fluorochemistry allows these batteries to withstand high-voltage performance by utilizing the inherent thermodynamic stability of the C–F bond. The specific structure-activity relationships contribute to a safer, higher-performing, and longer-lasting Li-ion battery.
Improved Critical Cell Features
HES formulates superior additives and co-solvents to improve electrolyte stability in the high-voltage NMC cathode of the Li-ion battery. Additionally, fluorochemicals offer cell component compatibility along with refined separator wettability by improving ion transport through the separator to help meet the demand for higher energy densities in Li-ion batteries.
Enhanced SEI Layer
The solid electrolyte interphase (SEI) is essential to the health and performance of the Li-ion battery. This layer assists in mitigation of the initial capacity loss in early cycles, increases cell lifetime, and improves overall battery safety. HES formulates fluorinated materials that enhance this protective coating by generating uniform SEI layers that electronically insulate and protect the surface of the anode and prevent adverse degradation of the electrolyte at higher voltages.
Traditional electrolyte solvents are susceptible to electrochemical degradations that result in decreased capacity retention and cyclability over time. Li-ion battery manufacturers are seeking materials that increase cyclability to maximize the number of battery recharges. Fluorinated materials have greater anodic stabilities for greater capacitance and prolonged battery lifetime compared to their non-fluorinated counterparts, making them ideal for use at high-voltage ranges. HES fluorinated ethers improve the battery’s capacity retention by >25% after 250 cycles and fluorinated esters by >28% after 250 cycles.
Advanced Charge Transport
HES formulates specialty fluorochemicals to meet the demands of high-voltage electrochemistry. These solutions provide Li-ion battery manufacturers with the ability to explore the use of novel fluoropolymers in separator material and can be used to increase wetting of the battery separator by the electrolyte solution. Additionally, their fluorinated co-solvents can facilitate more efficient ion-transport throughout the cell.
Halocarbon Electronic Solutions is committed to supplying a broad range of ready-to-formulate additives and co-solvents for safer, lighter, and longer-lasting batteries. Our goal is to formulate fluorinated materials for Li-ion batteries that are more accessible and commercially viable. Looking to learn more? Contact our sales manager for more information on our fluoroproducts.