期刊论文

Long, B;Deng, Q

英文

Chemical Engineering Journal

1385-8947

2024

480

148369

10.1016/j.cej.2023.148369

The schematic illustration of the preparation procedure of the LiNi0.5Mn1.5O4 materials is displayed in Fig. 1a. Pure LiNi0.5Mn1.5O4 is prepared by calcinating the commercial MnO2 in ternary molten salt (KCl@LiCl@NiCl2). While a quaternary molten salt of KCl@LiCl@NiCl2@CoCl2 is used to synthesize Co-doped LiNi0.5Mn1.5O4. Reductive molten salt and Co doping contribute to the formation of disordered phase. The successful preparation of MS-LNMO and MS-xCo-LNMO is proven in the following tests.

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The electrochemical performances of LiNi0.5Mn1.5O4 (LNMO) materials are strongly correlated with the ratio of disordered to ordered phases. Nevertheless, there are few reports on the adjustment of ordered and disordered phase ratio. In this paper, the ratio of ordered to disordered phases in LNMO is successfully adjusted by using a quaternary molten salt, which is proven by XRD refinement, FT-IR, and XPS. Reductive quaternary molten salt and Co doping are favorable for Ni/Mn cation disorder, leading to the increased disordered phase. LNMO with an appropriate ratio of ordered to disordered phas...