Carbon materials are generally preferred as anodes in supercapacitors,however their low capacitance limits the attained energy density of hybrid and asymmetric supercapacitors.Here,we develop a novel strategy to synthesize low-crystalline FeOOH nanoparticle anode with high comprehensive performance at a wide potential window.The FeOOH nanoparticles present high capacitance at both low and high mass loadings(1066 and 716 F g-1 at 1.6 and 9.1 mg cm-2 respectively),good rate capability(74.6%capacitance retention at 30 A g-1)and excellent cycling stability(91%capacitance retention after 10000 cycles).The excellent performance is attributed to the dominant capacitive charge-storage contribution(~90%at 5 mV s-1).A NiMoO4//FeOOH hybrid supercapacitor shows exceptional stability during float voltage test for 450 hours and high energy density of 104 Wh kg-1 at a power density of 1.27 kW kg-1.The packaged device delivers high gravimetric and volumetric energy densities of 33.14 Wh kg-1 and 17.24 Wh L-1,respectively.