https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46663 3−x) electrode with an ultrahigh mass loading of 15.4 mg cm⁻² on a functionalized partially exfoliated graphite substrate using a facile electrochemical method. In addition to the highly open graphene nanosheets atop, the unique layered structures of intercalated graphite sheets ensure efficient ionic transport in the entire MoO_3−x electrode. The oxygen-containing functional groups on the exfoliated graphene can bind strongly with the MoO_3−x via formation of C–O–Mo bonding, which provides a fast electron transport path from graphene to MoO_3−x and thus allows high reversible capacity and excellent rate performance. The optimized MoO_3−x electrode delivers an outstanding areal capacitance of 4.03 F cm⁻² at 3 mA cm⁻² with an excellent rate capability which is significantly higher than the values of other molybdenum oxide based electrodes reported to date. More importantly, the areal capacitance increases proportionally with the MoO_3−x mass loading, indicating that the capacitive performance is not limited by ion diffusion even at such a high mass loading. An asymmetric supercapacitor (ASC) assembled with an MoO_3−x anode delivers a maximum volumetric energy density of 2.20 mW h cm⁻³ at a volumetric power density of 3.60 mW cm⁻³, which is superior to those of the majority of the state-of-the-art supercapacitors.]]> Mon 28 Nov 2022 18:32:21 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44574 2.0 V) have been reported. Herein, the effects of theoretical mechanisms on voltage window are first introduced, which provide the fundamental guidance to enlarge the voltage window of aqueous SCs. Subsequently, the strategies for constructing the aqueous SCs over 2.0 V are comprehensively summarized and classified into the electrode modification by structural engineering, metal cations doping and constructing advanced composites, and the electrolyte optimization by preparing “Water in Salt” and novel mixed electrolyte. Finally, via the discussion of current progresses and drawbacks of these >2.0 V aqueous SCs, their future development directions are proposed.]]> Mon 17 Oct 2022 11:37:36 AEDT ]]>