Practical fuel cells are already ubiquitous, but publication of everything around them is heavily suppressed. Your instincts against batteries are well grounded, but there are commercial forces inhibiting our understanding of hydrogen and fuel cells. I am doing a series right now, on how to use model based design to create domestic and community solar hydrogen installations, the next part in the series will be on fuel cells, I will cover a little of how to source them, probably from Alibaba.