8362
The B - rG - O had a high specific surface area of 466 m ( 2 ) / g and showed excellent supercapacitor performance including a high specific capacitance of 200 F / g in aqueous electrolyte as well as superior surface area - normalized capacitance to typical carbon - based supercapacitor materials and good stability after 4500 cycles .
 Chemical: B; Chemical: O; 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: B; Chemical: O; Chemical: carbon