Nissan Motor Co., which reported record U.S. sales of Leaf hatchbacks in 2013, is optimistic that it can soon double deliveries, Chief Executive Officer Carlos Ghosn said.

Sales of the battery-powered Leaf jumped 130 percent last year to 22,610 vehicles, aided by 2,529 deliveries in December, the most ever in a single month for the Yokohama-based firm. That should keep rising, Ghosn said in a CNBC interview Wednesday.

"We are now on a trend of 3,000 cars a month in the U.S., which is about 36,000 cars" a year, Ghosn said. "The next step is moving up to 4,000 a month," he said, without setting a target date.