Work

Synthesis of Single-Crystalline LiMn2O4 with Different Dimensional Nanostructures for Li-ion Batteries

Year: 2014

Type: article

Abstract: The powders of single-crystalline LiMn2O4 with different dimensional nanostructures were synthesized. The effect of nanostructure on the electrochemical properties of LiMn2O4 cathode was also investigated by controlling the nanostructure of LiMn2O4, consisting of one-dimensional (1-D) nanorods with the diameter of 100 nm and length of 1.6 μm, of two-dimensional (2-D) nanoplates with the diameter ranging from 300 to 400 nm and a thickness of 20 nm, and of three-dimensional (3-D) octahedral single-crystals with edge length of 1 pm. It was found that the 1-D LiMn2O4 performed the best electrochemical properties with a high discharge capacity of 123.4 mAhg-1, a stable cyclic retention, and an excellent rate capability (107.6 mAhg-1 at 10 C, 89.3% of 0.5 C-rate discharge capacity). Electrochemical impedance spectroscopy testing revealed the improved electrochemical performance, which could be considered that the nanostructure can reduce the impedance by enhancing the reaction area and lengthening the Li+ diffusion length.

Source: International Journal of Electrochemical Science

DOI: 10.1016/s1452-3981(23)10896-0