Reduced-graphene oxide/molybdenum oxide/polyaniline ternary composite for high energy density supercapacitors: Synthesis and properties

Reduced- graphene oxide/molybdenum oxide/polyaniline ternary composites, RGO(MP), for use as electrode materials for high energy density supercapacitors, were firstly synthesized using a one-step method with Mo3O10(C6H8N)(2)center dot 2H(2)O and graphene oxide (GO) as precursors. When the mass ratio of Mo3O10(C6H8N)(2)center dot 2H(2)O to GO is 8 : 1, the resulting composite RGO(MP)(8) shows excellent electrochemical performance with a maximum specific capacitance of 553 F g(-1) in 1M H2SO4 and 363 F g(-1) in 1M Na2SO4 at a scan rate of 1 mV s(-1). Its energy density reaches 76.8Wh kg(-1) at a power density of 276.3W kg(-1), and 28.6Wh kg(-1) at a high power density of 10294.3Wkg(-1) in H2SO4. While in Na2SO4, the energy density achieves 72.6 W h Kg(-1) at a power density of 217.7 W kg(-1) and 13.3 W h Kg(-1) at power density of 3993.8 W kg(-1), respectively. The composite also presents good cycling stability (86.6, 73.4% at 20 mV s(-1) after 200 cycles in 1 M H2SO4 and Na2SO4, respectively).