Journal
IONICS
Volume 23, Issue 9, Pages 2301-2310Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-2089-7
Keywords
Calcium citrate; Shape controlled; Porous carbon; Lithium-ion batteries
Funding
- National Natural Science Youth Foundation of China [NSFC 51003008]
- State-Owned Enterprises
- Universities of Sichuan Province [80303-SZL021]
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Porous carbon nanosheets (PCNSs), porous carbon nanofibers (PCNFs), and flowerlike porous carbon microspheres (FPCMs) were successfully synthesized through a carbonization method combined with a simple acid pickling treatment using calcium citrate as the precursor. The as-prepared products show uniform morphologies, in which the FPCMs are self-assembled from PCNSs. As anodes of lithium-ion (Li-ion) batteries, these carbon materials deliver a stable reversible capacity above 515 mAh g(-1) after 50 cycles at 100 mA g(-1). Compared with PCNSs and PCNFs, FPCMs demonstrate preferable rate capability (378 mAh g(-1) at 1 A g(-1)) and cyclability (643 mAh g(-1) at 100 mA g(-1)). These results suggest that an appropriate select of morphology and structure will significantly improve the lithium storage capacity. The study also indicates that the novel shape-controlled porous carbon materials have potential applications as electrode materials in electronic devices.
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