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By focusing on SnO ( 2 ) , the hope is that such concepts and strategies can be extended to other potential metal oxides , such as titanium dioxide or iron oxides , thus shedding some light on the future development of high - performance metal - oxide based negative electrodes for LIBs .
 Chemical: SnO ( 2 ); Chemical: metal oxides; Chemical: titanium dioxide; Chemical: iron oxides; Chemical: metal - oxide
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: SnO ( 2 ); Chemical: metal oxides; Chemical: titanium dioxide; Chemical: iron oxides; Chemical: metal - oxide