Networked Amide Epoxy Polymer Electrolyte for Solid State Lithium-Ion Batteries, NAEPE

It is known that conventional LIBs with organic liquid electrolytes have safety issues such as flammability and leakage. Gel electrolytes have been applied in the market for many years. They are mostly used in

portable electronic devices rather than power LIBs. The main reason is that like polymer, gel electrolytes have lower ionic conductivity than liquid electrolytes, with difference by more than an order of magnitude. It limits the application of gel or polymer electrolytes in power LIBs. NAEPE (Networked Amide Epoxy Polymer Electrolyte) is a quasi-solid state, nonflammable and low cost electrolyte with high ionic conductivity and high voltage stability. NAEPE is a key material for the next generation solid-state Li-batteries and especially suitable for a variety of applications that operate at high voltage and temperature.

NAEPE enhances the safety and cycle life of high-energy density LIBs with its high ionic conductivity, non-flammability, and high voltage stability

 

▣ High Safety, Low Cost and Easy Processing

NAEPE can be applied in LIBs for electric vehicles, energy storage systems, and mobile electronic devices. NAEPE has the following advantages that are confirmed by a few cell manufacturers in Taiwan.

1. High safety (nonflammable, leak- and impact- proof batteries)

2. Low cost and easy processing (AEO can polymerize at ambient temperatures to absorb liquid electrolytes)

3. Excellent cyclability at high voltage (>4.5V) and temperature

4. Multi-applications (from portable electronic devices to vehicles)

NAEPE enhances the safety and cycle life of high-energy density LIBs with its high ionic conductivity, non-flammability, and high voltage stability NAEPE is a key material for the next generation solid-state Li-batteries and especially suitable for the electrical vehicles application to avoid liquid electrolyte leakage and improve the safety of LIBs 

 

Another advantage of NAEPE is battery high strength format, which increases battery safety and cycling stability. Nail penetration tests have shown that by using a stainless steel needle of 3 mm diameter to

penetrate an NAEPE cell, the penetration resistance is 100 times higher than that of a liquid electrolyte cell.

Furthermore, the NAEPE cell during the test does not cause combustion. It just induces a slight temperature rise ( to only around 150℃ ), while liquid electrolytes caught fire and the temperature rose up to 550℃ .

 

▣ The Nail Penetration Tests Show the NAEPE Cell has High Strength Format

By developing NAEPE, ITRI is able to provide high-energy, high-safety solid state batteries with excellent cycle life. The simple production process and friendly material cost have attracted battery manufactories including Amita, Formosa Plastics Corporation, CPC Corporation, and Gus Technology to cooperate with ITRI on material and battery verification. This technology is ideal for all kinds of portable communication equipment, energy storage systems and EVs, and will help industry capture new markets.

 

 

Material and Chemical Research Laboratories (MCL)

Dept. of Solid-State Li-Ion Batteries (N800)