Traditional fuel cells work by using a catalytic material to oxidise a fuel, such as hydrogen, turning it into a positively charged ion and a negative electron.
传统的燃料电池使用催化材料来氧化燃料，比如氢气，使之转变为一个带正电的离子与一个电子。
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The hydrogen and boron ion bombardments were performed by applying a negative bias voltage to the substrate during microwave plasma chemical vapor deposition process.