Journal
JOURNAL OF POWER SOURCES
Volume 491, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229577
Keywords
Morphology evolution; Manganese dioxide nanoparticle layer; High specific surface area; Li ion batteries
Funding
- South China University of Technology (the Young Talent Fellowship program) [X2hjD2192020]
- Guangdong Pearl River Talent Program [2019QN01L560]
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In this study, hollow carbon nanospheres loaded with MnO2 were investigated as an anode material for lithium-ion batteries, showing excellent electrochemical performance and cycling stability.
In this work, hollow carbon nanospheres (HCN) loaded with MnO2 (denoted as MnO2@HCN) are investigated as an anode material for lithium-ion batteries. HCN is developed by treatment of 3-aminophenol and formaldehyde resin. MnO2 is loaded on the outer surface of HCN via the reduction of KMnO4 to form porous core-shell structures. SEM, TEM and XRD characterizations indicate that the MnO2@HCN has a spherical morphology with a core consisting of porous carbon nanoparticles and a shell consisting of MnO2 nanoparticles. The charge-discharge tests demonstrate that this unique configuration endows the resulting MnO2@HCN with excellent electrochemical performance as anode of a lithium ion battery, delivering a capacity of 604 mA h g(-1) at 0.3 C after 200 cycles, compared to 211 mA h g(-1) of the HCN. The porous structure consisting of small nanoparticles provides MnO2@HCN with high surface area and good structural stability, facilitating lithium insertion/extraction, which yields excellent cycling stability of the MnO2@HCN electrode.
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