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Low-temperature synthesis of Na 2Mn 5O 10 for supercapacitor applications

Low-temperature synthesis of Na 2Mn 5O 10 for supercapacitor applications,10.1016/j.jpowsour.2011.08.014,Lancet,Sheng Liu,Cheng-Zhi Fan,Yuan Zhang,Che

Low-temperature synthesis of Na 2Mn 5O 10 for supercapacitor applications  
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The romanechite-like sodium manganese oxide Na2Mn5O10 is synthesized through alkaline hydrolysis of [Mn12O12(CH3COO)16(H2O)4] followed by thermal calcination. Amorphous Na2Mn5O10 is obtained at relatively low temperature (200°C). Increasing the calcination temperature leads to highly crystalline nano-rods. Electrochemical studies demonstrate that Na2Mn5O10 is a good candidate as positive electrode materials for supercapacitor: specific capacitances of 178, 173 and 175Fg−1 are obtained for Na2Mn5O10 calcined at different temperatures (200, 400 and 600°C), respectively, by charge–discharge tests at 0.1Ag−1. Moreover, capacitance losses of all the products in 1000 cycles are less than 3%.
Journal: Lancet , vol. 196, no. 23, pp. 10502-10506, 2011
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