This book entitled Selected papers from IEEE ICKII 2019 selected 13 excellent papers from the 260 papers presented in the IEEE International Conference on Knowledge Innovation and Invention (IEEE ICKII) 2019 on energies. The 2nd IEEE ICKII 2019 was held in Seoul South Korea 12-15 July 2019 and provided a unified communication platform for research on information technology innovation design communication science and engineering industrial design creative design applied mathematics computer scien