Abstract
Sn-doped δ-MnO2 (Sn-MnO2) hollow nanoparticles have been synthesized via chemical process at room temperature. Many characterizations have been carried out to fully identify the intrinsic information of the as-prepared samples and investigate their electrochemical properties. The results indicate that the morphologies of the samples can be adjusted by changing the concentration of Sn while the capacitance of Sn-MnO2 nanoparticles increased corresponded with that of the undoped δ-MnO2 nanoparticles. The specific capacitance of Sn(1 at.%)-MnO2 is up to 258.2 F g− 1 at a current density of 0.1 A g− 1. What’s more, over 90% of the initial specific capacitance still remains after 1000 cycles at a current density of 2.0 A g− 1, displaying excellent cycling stability.
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Acknowledgements
This work was supported by the Fundamental Research Funds for the Central Universities Key Project (No. XDJK2017B062), the Central Universities Student Program (No. XDJK2017D011) and the National Undergraduate Training Program for Innovation and Entrepreneurship (No. 201710635009).
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Miao, J., Lin, H., Mao, Z. et al. Electrochemical performance of Sn-doped δ-MnO2 hollow nanoparticles for supercapacitors. J Mater Sci: Mater Electron 29, 2689–2697 (2018). https://doi.org/10.1007/s10854-017-8195-5
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DOI: https://doi.org/10.1007/s10854-017-8195-5