Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 3, Pages 3424-3433Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b05651
Keywords
Fe3O4; Hierarchically porous; N-Doping; Soft-template; Lithium-ion battery
Categories
Funding
- National Natural Science Foundation of China for Innovative Research Groups [51621002]
- NSFC [51572083, 51572084, 51672083]
- Program of Shanghai Academic/Technology Research Leader [18XD1401400]
- Basic Research Program of Shanghai [17JC1404702]
- Shanghai Rising-Star Program [16QA1401300]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- 111 project [B14018]
- Fundamental Research Funds for Central Universities [222201718002]
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Recently, 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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