Electrolyte for Lithium Ion Batteries

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention describes a novel electrolyte for lithium-ion batteries and other electrochemical energy storage devices. The electrolyte uses a high proportion of non-aromatic cyclic nitriles, such as cyclopentancarbonitrile, alone or mixed with select linear nitriles, as the main solvent. This formulation significantly reduces corrosion of aluminum current collectors when using highly stable but previously problematic lithium salts like LiTFSI (Lithium bis(trifluoromethanesulfonyl)imide). The result is an electrolyte that is both highly stable (thermally and electrochemically), compatible with common electrode materials, and safer than traditional electrolytes.

Use CasesContent extracted from patent full text and abstract with AI.

• Lithium-ion batteries for portable electronic devices (smartphones, laptops, tablets)
• Electric vehicle (EV) battery systems requiring high stability and longer lifetime
• Stationary energy storage solutions, including grid-scale batteries and backup power systems
• Advanced supercapacitors and electrochemical capacitors
• High-temperature battery applications demanding improved safety and performance
• Polymer batteries and other next-generation lithium-based batteries
• Batteries for aerospace and harsh environmental conditions

BenefitsContent extracted from patent full text and abstract with AI.

• Greatly reduces corrosive dissolution of aluminum current collectors, increasing battery lifespan
• Enables the use of safer, more thermally and chemically stable lithium salts (e.g., LiTFSI)
• Minimizes formation of hazardous decomposition products like HF, improving safety
• Compatible with standard electrode materials like NMC, LFP, and graphite
• Significantly enhances shelf life and operational safety of lithium-ion batteries, even at elevated temperatures
• Provides wide electrochemical and thermal stability window, supporting high voltage cells and safe operation under demanding conditions
• Allows efficient operation at a wide temperature range, including better performance at low temperatures
• Facilitates higher cell voltages (> 4.2V) with reduced risk of component degradation

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to an electrolyte for an electrochemical energy storage means comprising an electrolyte salt and at least one solvent, wherein the solvent comprises in the range from > 50% by weight to