Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 572, Issue -, Pages 122-132Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.03.063
Keywords
Tin dioxide; N, P-doped porous carbon; Anode material; Lithium-ion battery; Sodium-ion battery
Categories
Funding
- National Natural Science Foundation of China [21574032, 21875051]
- Sino-German Center [GZ1288, 325774457]
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An ultrafine tin dioxide/N, P-doped porous carbon (SnO2/NPPC) nanocomposite is prepared through in-situ growth of tin dioxide (SnO2) nanoparticles in N, P-doped porous carbon (NPPC). Owing to the in-situ growth method, the size of SnO2 nanoparticles in SnO2/NPPC is quite small and uniform (generally less than 5.0 nm). NPPC provides a support and a conductive carbon skeleton for the SnO2 nanoparticles. The small SnO2 nanoparticles are less likely to aggregate during the discharge-charge process due to the presence of Sn-O-C bonding and nanoconfinement effect of SnO2 nanoparticles in carbon matrix. The N and P doping can provide abundant defects to facilitate the penetration of Li+ or Na+ into the interior of the electrode. In addition, the presence of Sn-N bonding can further improve the electrochemical properties of the electrodes. Thus, as an anode material for lithium-ion batteries, SnO2/NPPC possesses an enhanced rate performance, an excellent cycling stability, and a high initial Coulombic efficiency. The structure of the ultrafine SnO2 nanoparticles is well maintained in cycled SnO2/NPPC. Meanwhile, SnO2/NPPC also possesses good electrochemical performance as an anode for sodium-ion batteries. The good electrochemical properties for SnO2/NPPC materials can be ascribed to the synergetic effect between small SnO2 nanoparticles and NPPC. (C) 2020 Elsevier Inc. All rights reserved.
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