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Fe3O4‑Embedded and N‑Doped Hierarchically Porous Carbon Nanospheres as High-Performance Lithium Ion Battery Anodes
journal contribution
posted on 2019-01-06, 00:00 authored by Jiayi Mao, Dechao Niu, Nan Zheng, Guangyu Jiang, Wenru Zhao, Jianlin Shi, Yongsheng LiRecently,
Fe3O4-based materials have been
widely studied as anodes in lithium-ion batteries (LIBs) because of
the large theoretical capacity (924 mAh g–1) and
environmental benignity. Unfortunately, these materials suffer from
the low practical capacity and poor cycling stability. Herein, we
developed a simple “soft-templating” approach to fabricate
multiple Fe3O4 nanoparticles-embedded and N-doped
hierarchically porous carbon nanospheres (Fe3O4@N-HPCNs) as anodes for LIBs by utilizing the self-assembly among
polystyrene-b-poly(acrylic acid), cetyltrimethylammonium
bromide, and hydrophobic Fe3O4 nanoparticles
in oil/water system. The resultant Fe3O4@N-HPCNs
present a well-defined spherical morphology, high specific surface
area, and unique dual-mesoporous core structures with multiple Fe3O4 nanoparticles in the large-mesopore channels.
More importantly, the Fe3O4@N-HPCNs anode exhibits
high reversible specific capacities of 1240 mAh g–1 (after 100 cycles at 0.1 A g–1) and 581 mAh g–1 (after 400 cycles at 1 A g–1).
Even at 10 A g–1, a specific capacity of ca. 290
mAh g–1 is still retained, indicating its excellent
rate capability. Therefore, such a “soft-templating”
approach is expected to provide us a new pathway to design and prepare
other nanoparticles@porous carbon anodes for LIBs.
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Keywords
surface areaLIBFe 3 O 4High-Performance Lithium Ion Battery Anodescapacityrate capabilityFe 3 O 4 nanoparticles-embeddedFe 3 O 4 nanoparticlescarbon nanospheresN-HPCNs anode exhibits400 cyclesmAhcycling stability100 cyclesN-doped hierarchicallylarge-mesopore channelslithium-ion batteriesdual-mesoporous core structures
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