The controllable morphology and size Li-rich Mn-based layered oxide LiNiCoMnO with micro/nano structure is successfully prepared through a simple coprecipitation route followed by subsequent annealing treatment process. By rationally regulating and controlling the volume ratio of ethylene glycol (EG) in hydroalcoholic solution, the morphology and size of the final products can be reasonably designed and tailored from rod-like to olive-like, and further evolved into shuttle-like with the assistance of surfactant. Further, the structures and electrochemical properties of the Li-rich layered oxide with various morphology and size are systematically investigated. The galvanostatic testing demonstrates that the electrochemical performances of lithium ion batteries (LIBs) are highly dependent on the morphology and size of LiNiCoMnO cathode materials. In particular, the olive-like morphology cathode material with suitable size exhibits much better electrochemical performances compared with the other two cathode materials in terms of initial reversible capacity (297.0 mAh g) and cycle performance (95.4% capacity retention after 100 cycles at 0.5 C), as well as rate capacity (142.8 mAh g at 10 C). The excellent electrochemical performances of the as-prepared materials could be related to the synergistic effect of well-regulated morphology and appropriate size as well as their micro/nano structure.

Fusiform porous micro-nano 0.5Li2MnO3·0.5LiNi1/3Co1/3Mn1/3O2 has been synthesised as a cathode material for high performance lithium ion batteries.

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Effect of LiTi2(PO4)3 coating on the electrochemical properties of spherical layered Li1.5Ni0.25Mn0.75O2+δ cathode material.

The Mn doped spherical Li 2 FeSiO 4 /C cathode materials are successfully synthesized through a citric acidassisted sol-gel method. The effects of Mn doping on the chemical composition, structure characteristics, morphology and elemental distribution of the as-prepared polyanionic cathode materials are investigated by the inductively coupled plasma optical emission spectroscopy (ICP-OES), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM) and energy-dispersive X-ray spectroscope (EDX). The results indicate that the alien atom Mn can effectively and equably dope into the samples as well as maintain the original spherical morphology. Besides, the electrochemical measurements reveal that the sample doped with 5% Mn delivers the highest initial discharge capacity of 248.5 mAh g À1 at 0.1C under ambient temperature in a voltage range of 1.5-4.8 V, the retention of the capacity is as high as 91.9% after 200 cycles. Additionally, the sample doped with 5% Mn also exhibits a good rate capability with a discharge capacity of 105.6 mAh g À1 even at a high rate of 10C. The excellent electrochemical performances can be ascribed to the appropriate Mn doping, which can effectively optimize the crystal structure of Li 2 FeSiO 4 /C and facilitate the diffusion coefficient of lithium-ion during cycling process.