Synthesis of mesoporous LixMnO2 as a cathode material of Lithium ion battery via one-pot galvanostatic electrodeposition method

Mesoporous LixMnO2 cathode material is synthesized using the one-pot anodic electrodeposition through simultaneous electrodeposition and Li+ incorporation into the host manganese dioxide without using of any template. Incorporating Li into the manganese oxide structure definitely influences the properties of the final material. The content of incorporated Li+ in the manganese dioxide structure (x in LixMnO2 , x = 0.07-0.33) is determined as a function of Li+ concentration in the electrodeposition bath. The various contents of Li+ in samples have a tremendous impact on the ultimate material in terms of structural and physicochemical properties. The structural changes of host manganese dioxide as a consequence of Li+ intercalation have been identified through the X-ray diffraction, inductively coupled plasma-optical emission spectroscopy, Fourier transform infrared, thermogravimetric/differential scanning calorimetry as well as Raman spectroscopy. The results of nitrogen adsorption-desorption isotherms along with the scanning electron microscopy proved the mesoporous structure of electrode materials with a significantly high surface area. Among the LixMnO2 materials, the Li0.21MnO2 , shows the best electrochemical performance with the first discharge capacity of 283.0, 240.0, 191.0,161.0 and 113.0 mAh g(-1) at 0.1C, 0.2C, 1C, 2C and 5C, respectively, retaining 92% of the initial capacity over 50 cycles at 0.1C.