Supercapacitors had higher power density compared with rechargeable battery and larger capacity,higher energy,broad operating temperature range and long cycle life compared with conventional capacitors.The energy storage of supercapacitors of mental oxide was based on quasi-capacitor,the electrode materials were classified into three sorts:precious mental oxides,base mental oxides and composition mental oxides.The energy storage mechanism,preparation and the recent research progress in metal oxides supercap...