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The performance of the battery cathode depends on the electrode microstructure and morphology, as well as the inherent electrochemical properties of the cathode materials. The spinel LiMn 2 O 4 is the most promising candidate as a cathode material because of its low cost and nontoxicity compared with commercial LiCoO 2 . However, there is still a challenge to synthesize high-quality single-crystal nanostructured cathode materials. Nanowires offer advantages of a large surface to volume ratio, efficient electron conducting pathways and facile strain relaxation. To enhance the activity and stability, flexible spinel nanowires are synthesized, via α-MnO 2 nanowire precursor method. Ultrathin LiMn 2 O 4 nanowires with cubic spinel structure were synthesized by using a solvothermal reaction to produce α-MnO 2 nanowire followed by solid-state lithiation. LiMn 2 O 4 nanowires have diameters less than 10 nm and lengths of several micrometers. The LiMn 2 O 4 nanowires are used as stabilizing support during the electrochemical redox processes. The unique nanoporous material effectively accommodates structural transformation during Li+ ion insertion and effectively reduces Li+ diffusion distances, reducing the volumetric changes and lattice stresses during charge and discharge. Galvanostatic battery testing showed that LiMn 2 O 4 nanowires delivered 146 mAh/g in a large potential window. The electrochemical and spectrochemical interrogation techniques demonstrated that LiMn 2 O 4 nanowires are promising cathode materials for lithium ion batteries as apposed to LiMn 2 O 4 powders.

Analysis of Electrochemical and Structurally Enhanced LiMn2O4 Nanowire Cathode System