Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 24, Pages 12369-12374Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm31910a
Keywords
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Funding
- National Natural Science Foundation of China [50572003, 50972004]
- State Key Basic Research Program of China [2006CB9326022006]
- Foundation of Excellent Doctoral Dissertation of Beijing City [YB20081001001]
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Novel hierarchical porous carbon nanosheets (HPCS) with quantities of micropores and mesopores were prepared on a large-scale by using thermoplastic phenolic formaldehyde resin as the carbon source and copper nitrate as the template precursor. The HPCS, possessing a thickness of about 40 nm and the width of several microns, exhibited a high specific capacity and favorable high-rate performance when used as an anode material for lithium ion batteries (LIBs). The reversible capacities were 748 mA h g(-1) at a current density of 20 mA g(-1) and 460 mA h g(-1) even at 1 A g(-1), which were much higher than those of traditional porous carbon materials. It also showed superior cyclical stability for only 0.3% capacity loss per cycle under high rate charge-discharge process, suggesting that HPCS should be a promising candidate for anode materials in high-rate LIBs. The roles of various-sized pores in HPCS in Li storage were discussed briefly.
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