This comes right after you reach the Penguin.
This boss is a big guy with lots of area attacks. He's powered by lightning coming out of three spots in the ground. When the lightning is active, stay away until it ends. Use explosives to take out those spots, then punch the boss. The lightning spots will repair themselves, but now they with have protective stutters. You can place the explosives at anytime, but only detonate when the stutters are open. Punch the boss some more.
For the third and final round, the boss will stay in one place, the lightning spots will again have stutters, and the lightning will fire more often. Just be patient and you'll find an opening.