1. High specific energy electrolyte
The pursuit of high specific energy is currently the biggest research direction for lithium-ion batteries, especially as mobile devices occupy an increasingly larger proportion of people's lives, battery life has become the most critical performance characteristic of batteries.
2. High-power electrolyte
Currently, commercially available lithium-ion batteries struggle to achieve high-rate continuous discharge, primarily due to severe overheating of the battery tabs. Internal resistance leads to excessively high overall battery temperature, increasing the risk of thermal runaway. Therefore, electrolytes must maintain high conductivity while suppressing rapid battery temperature rise. Furthermore, achieving fast charging is a crucial direction for electrolyte development in the field of power lithium batteries.
3. Wide-temperature range electrolyte
At high temperatures, batteries are prone to electrolyte decomposition and increased side reactions between materials and electrolyte components; while at low temperatures, electrolyte salt precipitation and a significant increase in the impedance of the negative electrode SEI film may occur. A wide-temperature electrolyte is designed to provide batteries with a wider operating range.
4. Safety Electrolyte
Battery safety is primarily concerned with combustion and even explosion. Batteries themselves are flammable; therefore, overcharging, over-discharging, short-circuiting, external irritation such as punctures or pressure, and excessively high temperatures can all trigger safety incidents. Consequently, flame retardancy is a crucial area of research in safe electrolytes.
5. Long-circulation electrolyte
Currently, the recycling of lithium-ion batteries, especially power lithium batteries, still faces significant technical challenges. Therefore, improving battery life is one way to alleviate this situation. The research approach for long-cycle electrolytes focuses on two key aspects: first, electrolyte stability, including thermal, chemical, and voltage stability; and second, stability with other materials, requiring stable film formation with electrodes, no oxidation with separators, and no corrosion with current collectors.
