Advance Sensor for Monitoring Electrolyte Leakage in Lithium-ion Batteries for Electric Vehicles

Abstract

In the current era of autonomous mobility, designing safe energy storage system is one of the challenging tasks. The internal reactions such as electrolyte leakage and electrolysis are one of the major issues of Li-ion batteries failure. An advance nano-sensors can be one of the feasible solutions which can detect gas vapors (methane, carbon dioxide, oxygen, carbonates) at ppb levels. In the present work, advance sensing mechanism that is selective memory-based sensing film made up of the polymeric-Triethyl 1,3,5-triazine-2,4,6-tricarboxylate doped with copper grown on graphdiyne coated carbon nanofibers. The developed nanocomposite has high efficiency to sense gases and volatile organic compounds with no cross-selectivity. This miniaturized sensor has unique property of detection of carbonates as well as hydro fluorides, which can be the indicator of electrolysis in the batteries. Novel fabricated sensor has capability to sense vapors of carbonates, methane, and hydro fluorides at 10−2 ppb level with good resolution in signals. Real-time detection leakage gives very early signature of health of battery and gives opportunity to manufacturers to develop high performance Lithium-ion batteries. The developed sensor also provides insights on the chemical sensing capability of modified graphdiyne coated carbon nanofibers and capabilities to withstand in hazardous internal battery environment.