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Although MnO2 is a promising material for supercapacitors ( SCs ) due to its excellent electrochemical performance and natural abundance , its wide application is limited by poor electrical conductivity .
 Chemical: MnO2
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: MnO2