A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries

作者：Wang Xiaoya; Hao Hao; Liu Jiali; Huang Tao; Yu Aishui^*

来源：Electrochimica Acta, 2011, 56(11): 4065-4069.

DOI：10.1016/j.electacta.2010.12.108

• Macroporous
• Rate capacity
• Lithium manganese nickel oxide
• Lithium ion battery
• Cathode materials

A simple one-step route using gas template method is applied to synthesize macroporous LiNi(0.5)Mn(0.5)O(2) which is characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Telle (BET) surface area, charge-discharge tests and electrochemical impedance spectroscopy (EIS) measurements. The as-synthesized material shows pure crystalline phase of LiNi(0.5)Mn(0.5)O(2), while the microstructure is comprised of macrospores ranging from 0.2 to 0.5 mu m. The first discharge capacity is of 174 mAh g(-1) at 0.1 C rate, which is much higher than that of the material synthesized by the conventional solid state reaction method. Furthermore, the macroporous LiNi(0.5)Mn(0.5)O(2) material shows remarkable rate capacity and cycle stability, which may be attributed to the shorter lithium ion diffusion distance and better electrolyte penetration.

• 出版日期2011-4-15
• 单位复旦大学