Journal
CARBON
Volume 189, Issue -, Pages 46-56Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.12.051
Keywords
SnSx; N/P heteroatom codopant; Chlorella; Electrospinning; Na/K ion batteries
Funding
- National Key R&D Program of China [2019YFC1904500]
- National Natural Science Foundation of China [NSFC 51502036, 21875037]
- Young Top Talent of Fujian Young Eagle Program
- Natural Science Foundation of Distinguished Young Scholars for Fujian Province [2019J06015]
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In this study, waste chlorella was used as a reactor and phosphorous source to design few-layered tin sulfides immobilized on nitrogen and phosphorus dual-doped carbon nanofibres. The material exhibited impressive sodium/potassium ion storage performance and promising long-life cycling performance, suggesting its great potential for sodium/potassium-ion battery applications.
Na/K-ion batteries (SIBs/PIBs) owing to their low cost, earth abundance, appropriate redox potential and comparable electrochemical performance, have gained ever-growing attention. Nevertheless, it remains a major challenge for high performance of SIBs/PIBs applications. Herein, with the assistance of waste chlorella as the reactor and phosphorous source, we designed few-layered tin sulfides immobilized on nitrogen and phosphorus dual-doped carbon nanofibres (SnSx-N/P-CNFs). The characterization and DFT calculation results demonstrate that N/P co-doping is expected to favour the distribution of electron density and strengthen ion reaction kinetics, which can enhance the Na+/K+ storage performance. As expected, as an anode material for SIBs, the SnSx-N/PeCNF electrode displays an impressive capacity (522 mAh g(-1) after 50 cycles at 0.1 A g(-1)) and promising long-life cycling performance (214 mAh g(-1) up to 32,000 cycles at 10 A g(-1)). Moreover, it also exhibits exceedingly impressive potassium-ion storage performance (468 mAh g(-1) at 0.1 A g(-1) after 100 cycles and 170 mAh g(-1) exceed 10,000 cycles at 5 A g(-1)), which is the one of the optimal long-cycle properties reported for Sn-based anode for PIBs to date. Our work provides a reference for using biomass algae as the nitrogen and phosphorous source in constructing energy storage materials. (C) 2021 Elsevier Ltd. All rights reserved.
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