Solution combustion synthesis and enhanced electrochemical performance Li1.2Ni0.2Mn0.6O2 nanoparticles by controlling NO3–/CH3COO– ratio of the precursors

• The size of Li1.2Ni0.2Mn0.6O2 nanoparticles can be controlled by NO3−/CH3COO− ratio.
• 35 nm Li1.2Ni0.2Mn0.6O2 nanoparticles can be obtained with 3:1 NO3–/CH3COO– ratio.
• 35 nm Li1.2Ni0.2Mn0.6O2 nanoparticles shows excellent electrochemical performance.

Lithium-rich layer oxide Li1.2Ni0.2Mn0.6O2 nanoparticles were fabricated through solution combustion synthesis by controlling NO3–/CH3COO– ratio of the precursors. The relationships between the NO3–/CH3COO– ratio and structure as well as electrochemical performance of Li1.2Ni0.2Mn0.6O2 nanoparticles are investigated. XRD reveals that Li1.2Ni0.2Mn0.6O2 nanoparticles obtained with a suitable NO3–/CH3COO– ratio of 3:1 (LLO-3N1A) is composed of the smallest nanocrystallite of 18 nm. SEM reflects that the average primary particles of LLO-3N1A are the smallest with a size of 35 nm. Those unique characteristic guarantee the excellent electrochemical performance of LLO-3N1A. LLO-3N1A exhibits a specific capacity of 252.3 mA h g−1 at 0.1 C. In addition, LLO-3N1A also shows best rate capability among the four prepared Li1.2Ni0.2Mn0.6O2 samples.

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