Max engine thrust by type: (varies by aircraft version and engine type)
747: 46,000 to 66,000 lb (x4)
777: 77,000 to 115,000 lb (x2)
787: 64,000, 76,000, lb (x2)
Yes energy storage is a major problem, perhaps even the critical point that will prevent changes in large aircraft. But the point was that generating large amounts of thrust electrically on large aircraft is also not solved and has been being worked for awhile - if I have missed some advance here I would love to read about it.