1. Hexagonal Boron Nitride-Based Electrolyte Composite for Li-Ion Battery Operation from Room Temperature to 150 °C.
- Author
-
Rodrigues, Marco‐Tulio F., Kalaga, Kaushik, Gullapalli, Hemtej, Babu, Ganguli, Reddy, Arava Leela Mohana, and Ajayan, Pulickel M.
- Subjects
PRIMARY cells ,BORON nitride ,LITHIUM-ion batteries ,ELECTROLYTES ,ELECTROCHEMICAL analysis ,THERMAL properties - Abstract
Batteries for high temperature applications capable of withstanding over 60 °C are still dominated by primary cells. Conventional rechargeable energy storage technologies which have exceptional performance at ambient temperatures employ volatile electrolytes and soft separators, resulting in catastrophic failure under heat. A composite electrolyte/separator is reported that holds the key to extend the capability of Li-ion batteries to high temperatures. A stoichiometric mixture of hexagonal boron nitride, piperidinium-based ionic liquid, and a lithium salt is formulated, with ionic conductivity reaching 3 mS cm
−1 , electrochemical stability up to 5 V and extended thermal stability. The composite is used in combination with conventional electrodes and demonstrates to be stable for over 600 cycles at 120 °C, with a total capacity fade of less than 3%. The ease of formulation along with superior thermal and electrochemical stability of this system extends the use of Li-ion chemistries to applications beyond consumer electronics and electric vehicles. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF