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3703021 
Journal Article 
High performance lithium-manganese-rich cathode material with reduced impurities 
Wang, Z; Yin, Y; Ren, Y; Wang, Z; Gao, Min; Ma, T; Zhuang, W; Lu, S; Fan, A; Amine, K; Chen, Z 
2017 
31 
247-257 
WOS:000393446500028 
Lithium-manganese-rich transition metal oxides have attracted substantial R&D attention due to their potential for high energy-density lithium-ion batteries. In this work, in situ high-energy X-ray diffraction was deployed to investigate the phase evolution during the solid-state synthesis of Li[Li0.2Mn0.54Ni0.13Co0.13]O-2. A step-wise consumption of the starting materials was observed during the one-step heating process primarily due to the heterogeneous nature of the precursor. According to observations from in situ high-energy X-ray diffraction, a two-step process was adopted to minimize the elemental heterogeneity of the final product. The electrochemical characterization results showed a substantial improvement on the reversible specific capacity for the material synthesized through the two-step process. 
Lithium-manganese-rich transition metal oxide; Cathode; Lithium-ion battery; Heterogeneity; In situ; High-energy X-ray diffraction