Citation: ZHENG Zhuo, WU Zhen-Guo, XIANG Wei, YANG Xiu-Shan. Preparation and Electrochemical Performance of Porous Micro-Nano Structure Layered Li-Rich 0.6Li₂MnO₃·0.4LiNi_0.5Mn_0.5O₂ Cathode for Lithium-Ion Batteries[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(3): 479-486. doi: 10.11862/CJIC.2017.059 shu

Preparation and Electrochemical Performance of Porous Micro-Nano Structure Layered Li-Rich 0.6Li₂MnO₃·0.4LiNi_0.5Mn_0.5O₂ Cathode for Lithium-Ion Batteries

1.
Polymer Research Institute, Sichuan University, Chengdu 610065, China
2.
School of Chemical Engineering, Sichuan University, Chengdu 610065, China
3.
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610065, China

Corresponding author: YANG Xiu-Shan, yangxs@scu.edu.cn
Received Date: 11 November 2016
Revised Date: 25 December 2016

Figures(7)

A Li-rich 0.6Li₂MnO₃·0.4LiNi_0.5Mn_0.5O₂ cathode material with porous micro-nano spherical structure is prepared using a combination of carbonate co-precipitation and combustion method. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ adsorpation-desorpation and galvanostatic charge-discharge tests are employed to analyze the crystal structure, micro morphology and electrochemical properties of the as-prepared material. Results indicate that this cathode has a porous micro-nano spherical structure, which is composed of primary particles with a small size about 300 nm. Moreover, this cathode has a well-ordered layered α-NaFeO₂ structure (space group R3m) and a high BET specific surface area of 13 m²·g^-1. Electrochemical measurements confirm that this cathode has excellent high capacity, good cycling stability and outstanding rate performance. At 2.0~4.8 V, the discharge capacities of the material at 0.1C, 0.2C, 0.5C, 1C, 3C, 5C and 10C are 266, 254, 235, 205, 186, 149 and 107 mAh·g^-1, respectively. After 100 cycles at 0.5C, the cathode also exhibits a discharge capacity of 217 mAh·g^-1 with capacity retention of 94%.
- micro-nano structure,
- carbonate co-precipitation,
- Li-rich cathodes,
- electrochemical performance,
- Lithium-ion batteries
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Preparation and Electrochemical Performance of Porous Micro-Nano Structure Layered Li-Rich 0.6Li2MnO3·0.4LiNi0.5Mn0.5O2 Cathode for Lithium-Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

Preparation and Electrochemical Performance of Porous Micro-Nano Structure Layered Li-Rich 0.6Li₂MnO₃·0.4LiNi_0.5Mn_0.5O₂ Cathode for Lithium-Ion Batteries