18264
However , when a voltage range of Ni - based cathode materials was increased up to > 4 . 5 V , phase transitions occurring above 4 . 3 V resulted in accelerated formation of the trigonal phase ( P3m1 ) and NiO phases , leading to and pulverization of the cathode during cycling at 60 degrees C .
 Chemical: Ni; Chemical: NiO
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: Ni; Chemical: NiO