Operando X-ray Diffraction on LCO Batteries Under Non-ambient Conditions

Performing operando X-ray diffraction on LCO batteries during cycling is a powerful tool to in-vestigate electrochemical properties and structural changes in batteries simultaneously. The possibility to perform these measurements in different temperature environments increases the applicability further by allowing the investigation of the structure and performance of the bat-tery at high or low temperatures.

Introduction

With the increasing trend of electrical mobility, high-performance battery materials that provide a reliable and safe energy source are more important than ever. To enable this mobility all year round on a global scale, it is especially important to develop batteries that provide similar performance both at high and low temperatures. This is a key challenge, with electrical vehicles losing up to 50% of their range per charge in winter, according to trials conducted by Consumer Reports.(1) To understand the reasons for these drops in performance, and to develop new methods in battery manufacturing to combat the behavior, it is essential to establish the structure-property relationship of the battery materials. For this, operando X-ray diffraction (XRD) measurements of assembled batteries during cycling are a powerful tool. XRD is a non-destructive method that penetrates deep into batteries and can therefore show crystalline changes in the battery material in real-time. Combining these operando measurements with a variable temperature parameter offers the additional advantage of observing the degradation processes, changes in capacity, and cycling efficiency in-situ.

 

References

1. www.consumerreports.org/cars/hybrids-evs/how-temperature-affects-electric-vehicle-range-a4873569949/ (accessed 28.11.24)

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