5936
The unique nanostructural features endow them with excellent electrochemical performance as demonstrated by high capacities of 640 mA h g ( - 1 ) after 100 cycles at 0 . 2 C rate and an excellent specific capacitance of 340 F g ( - 1 ) , which corresponds to the energy density of 45 W h kg ( - 1 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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