Abstract
By adjusting the oxidant amount and hydrothermal reaction temperature, a rod-shaped MnO2 sample was formed. Taking it as the manganese source, a Li-rich manganese-based cathode material (LMCM) with obvious rod-like micro/nano structure was obtained by high-temperature solid-state method. After conducting tests on the morphology structure and electrochemical performance, the results indicated that the micro/nano structure was made up of polyhedral nano-scale primary particles and rod-like micro-scale secondary particles. The obtained LMCM had the standard α-NaFeO2 crystal structure. At the charge and discharge rate of 0.1C, its initial discharge specific capacity and Coulombic efficiency were 267 mAh·g−1 and 85.8%, respectively, which was obviously better than those of LMCM prepared with commercially purchased MnO2 (222 mAh·g−1 and 76.3%) by the same operations. Additionally, the LMCM with rod-like micro/nano structure also demonstrated a high rate performance and a high cycle capacity retention (140 mAh·g−1 discharge capacity at 5C) after 50 cycles of charge / discharge), further indicating a promising application prospect.
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The data that support the findings of this study are available on request from the corresponding author, upon reasonable request.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51602266), Sichuan Province Key R&D Project (2021YFG0216), Chengdu Technology Innovation R&D Project (2022-YF05-00320-SN) and Fundamental Research Funds for the Central Universities (SRTP2023061).
Funding
This work was funded by Sichuan Province Key R&D Project, 2021YFG0216, Jiang Qi.
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Hu Lei: methodology, formal analysis, and writing—original draft; Song Xi: methodology and writing—review and editing; Lan Jiayi: data curation, investigation; Xue Wentao: data curation, investigation; Yang Chengsong: data curation, investigation; Qiu Jiaxin: writing—review and editing; Jiang Qi: conceptualization, resources, writing—review and editing.
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Lei, H., Xi, S., Jiayi, L. et al. Construction of rod-like micro/nano structure and its effects on the electrochemical energy storage performance of lithium-rich manganese-based cathode material. J Mater Sci: Mater Electron 35, 973 (2024). https://doi.org/10.1007/s10854-024-12732-z
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DOI: https://doi.org/10.1007/s10854-024-12732-z