13385
Accordingly , the following features were simultaneously incorporated into the design : ( i ) an optimal particle size , ( ii ) a conducting matrix , ( iii ) adequately large active material surface area and ( iv ) strong electrode material - current collector integrity .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None