Indonesia’s president Joko Widodo has called on the west to release a promised $20bn to finance his country’s green energy transition and do more to support its critical minerals industry, which underpins emerging technologies such as electric vehicles and batteries.

In an interview with the Financial Times, Widodo said there was “tremendous” concern in Indonesia over the delay of the funds, which a group of advanced economies, led by the US, promised a year ago to help accelerate the closure of its coal-powered plants.

“Don’t question Indonesia’s commitment towards [the] energy transition. What I’m questioning is the commitment of the developed states,” he said, adding that he had raised the issue at the G7 summit in Japan in May and the G20 summit in India in September.