Shuvrodev Biswas

Impurities Present and Visual Observation Analysis of IL The impurities in all AlCl 3 salts were analyzed using the ICP-OES technique, and the results are summarized in Table 2 , which do not fully align with the data provided by the supplier (see Table S3 ). The analysis indicates that only a few metals, namely Na, Mg, Ca, Fe, and Zn, along with the nonmetal S, were detected as impurities.

1. Introduction Click to copy section linkSection link copied! Since fossil fuels are the primary driver of global warming, the need for emission-free energy is becoming increasingly urgent. (1) The development of sustainable electrochemical energy storage systems is crucial for the extensive use of renewable green energy. (2) Due to their disadvantages, such as high cost, element scarcity, and concerns about reliability and safety, (3−5) alternatives to lithium batteries will become necessary.