23495
This study describes the use of the pyrrolidinium nitrate ( [ Pyrr ] [ NO3 ] ) protic ionic liquid ( PIL ) in a mixture with gamma butyrolactone ( gamma - BL ) as an electrolyte for carbon - based supercapacitors with an operating voltage of 2 . 0 V and at very low temperature .
 Chemical: pyrrolidinium nitrate; Chemical: [ Pyrr ] [ NO3 ]; Chemical: gamma butyrolactone; Chemical: gamma - BL; Chemical: carbon
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: pyrrolidinium nitrate; Chemical: [ Pyrr ] [ NO3 ]; Chemical: gamma butyrolactone; Chemical: gamma - BL; Chemical: carbon