Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education

Xiangtan, China

Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education

Xiangtan, China

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Yang S.-Y.,Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education | Wang X.-Y.,Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education | Liu Z.-L.,Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education | Yang X.-K.,Key Laboratory of Environmentally Friendly Chemistry and Applications of Minister of Education | And 3 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2011

Anhydrous layered sodium manganese oxides were synthesized by acetate sol-gel method and glycolic acid sol-gel method, respectively. The structure and performance of as-prepared materials were characterized by thermogravimetric analysis (TG), inductively coupled plasma (ICP), X-ray diffractometer (XRD), scanning electron microscope (SEM), galvanostatic charge/discharge and cyclic voltammetry (CV). The results show that the sample α-Na0.65MnO2.13 synthesized by glycolic acid sol-gel method has much better electrochemical performances than that of α-Na0.67MnO2.26 prepared by acetate sol-gel method. Besides, α-Na0.65MnO2.13 exhibits the second discharge capacity of 182 mA · h/g at a current density of 25 mA/g in the cutoff voltage of 2.0-4.3 V, and the capacity retention after 40th cycle is close to 90.6%.

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