Facile synthesis of porous Mn₂O₃ microsphere as an anode material for lithium ion batteries

Abstract

Abstract. The precursors of Mn2O3 was synthesized through co-precipitation method using MnAc2· 4H2O, NaHCO3 as raw materials. The precursors were heat-treated at 400℃, 500℃, and 600℃, respectively. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties of the samples were investigated also. The test results showed that the Mn2O3 (heat-treated at and 600℃) featured higher reversible capacity and better cycling performance than that of other samples. The specific capacity of the Mn2O3 samples (heat-treated at and 600℃) was 745 mAh/g respectively after 100 cycles at a constant current of 100 mA/g in the voltage range of 0.01-3 V. The preparation principle for the formation of the Mn2O3 samples and its electrochemical process of Mn2O3 were discussed also.

Structural, morphological and cryogenic magnetic behaviour of double perovskite La1.9Sr0.1NiMnO6−δ thin film

“…All the diffraction peaks corresponding to monoclinic phase like (110), (112), (202), (220), (310), (312), (204) and (224) are present in the film, confirming the single phase that is the monoclinic phase with P2 1 /n space group as also reported in bulk La 2 NiMnO 6 target [28,40]. The extra peak around 38 degrees is from the precursor Mn 2 O 3 [41] (JCPDS Card No. 78-0390) , that might have remained unmixed.…”