关键词: 微生物燃料电池, 电子接收体, 新能源, 重金属回收, 二氧化碳捕获

Abstract: The microbial fuel cells (MFCs) research progress is reviewed from the view point of cathodic functions. The cathodic system focuses on electron acceptors. Electron acceptors include traditional oxygen，potassium ferricyanide，permanganate and iodine，as well as protons，heavy metal ions，carbon dioxide and nitrate developed recently. MFCs’ functions expansion into hydrogen production，heavy metal recovery，carbon dioxide capture and nitrogen removal is contributed by the development of new electron acceptors.

Key words: MFCs, electron acceptors, new energy, heavy metal recovery, carbon dioxide capture