  We report three different synthesis routes while maintaining similar reaction
conditions to choose an effective way to precisely control the growth of
ultrafine one dimensional LiMn2O4 in the form of nanorods. We developed a novel
method of mixing the precursors through hydrothermal, yielding low dimensional
precursors for effective solid state reaction to synthesize the nanorods.
However, to achieve these, highly uniform beta-MnO2 nanorods were initially
grown as one of the main precursors. The uniformity observed in as grown
beta-MnO2 nanorods using hydrothermal technique help to attract minute LiOH
particles upon mixing over its highly confined nanoregime surface. This
facilitated the solid state reaction between MnO2 and LiOH to develop one of
the finest LiMn2O4 nanorods with diameters of 10 - 80 nm possessing high
surface area of 88.294 m2/g. We find superior charge storage behaviour for
these finely ordered 1D nanostructures as supercapacitor electrodes in KOH with
K3Fe(CN)6 as electrolyte in contrast to Li2SO4. A high pseudo - capacitance of
653.5 F/g at 15 A/g is observed using galvanostatic discharge time with high
retention capacity of 93% after 4000 cycles. The enhanced charge storage
property may arise from the redox couple [Fe(CN)6]3n/[Fe(CN)6]4n and K+ ions of
the electrolyte. To the best of our knowledge, we demonstrate for the first
time the effectiveness of a two step hydrothermal method in tuning the
supercapacitive behaviour of 1D LiMn2O4 in redox additive electrolyte.
