Journal
NANO ENERGY
Volume 58, Issue -, Pages 192-201Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.01.048
Keywords
Sodium-ion batteries; Prussian blue analogues; Cathode materials; 3D ultra-thin carbon networks; Interfacial synergistic effects; First-principles calculation
Categories
Funding
- National Natural Science Foundation of China [51472177, 11474216, 51772206]
- Science and Technology Support Program of Tianjin [16ZXCLGX00110, 16ZXCLGX00070]
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3D ultra-thin carbon networks are ideal skeleton structures for loading active materials as energy storage and conversion devices. In this work, excellent cathode materials for sodium ion batteries were successfully prepared by homogeneously anchoring NaxKyMnFe(CN)(6) (x+ y <= 2, NaK-MnHCF) on hierarchical porous 3D N-doped ultra-thin carbon networks (3DNC). The compounds present a high reversible capacity, good rate performance, and superior cycling stability. Combined fully experimental analysis and first-principles calculation, the interfacial synergistic effect between 3DNC and NaK-MnHCF on the sodium storage capacity is revealed, contributing to the extra capacity and electrical conductivity. Furthermore, considerable content of capacitive-controlled sodium storage of NaK-MnHCF@3DNC conduces to the rate performance. These results reveal an efficient route for the fabrication of other cathode materials for sodium ion batteries as high-performance energy storage devices.
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