18907
In - depth analysis of operando X - ray pair distribution function ( PDF ) data is combined with Li NMR spectroscopy to gain comprehensive insights into the electrochemical reaction mechanism of high - performance iron oxyfluoride electrodes .
 Chemical: Li; Chemical: iron oxyfluoride
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Li; Chemical: iron oxyfluoride