Journal
NANOSCALE HORIZONS
Volume 4, Issue 6, Pages 1402-1410Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nh00327d
Keywords
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Funding
- National Natural Science Foundation of China [21875292, 51525202]
- National Key Research and Development Program of China [2016YFA0202604]
- Fundamental Research Funds for the Central Universities [17lgjc36]
- Science Starting Foundation of Hunan University [531118010182]
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The Li-ion storage properties of transition metal oxide (TMOs) electrodes such as Li-ion intercalation-based electrodes are usually enhanced by hybridizing with 3D carbon scaffolds. However, understanding of the large variation in performance enhancement is rarely reported. As a proof of concept, intercalation reaction-based TMO (V2O5 and TiO2) nanowires were hybridized with two types of 3D carbon scaffolds (namely pristine carbon fiber cloth, CFC and porous N-doped CFC, PNCFC). Theoretical calculation predicts that the PNCFC@TMO hybrids displayed reasonably lower adsorption energy towards easier Li-ion intercalation than those of CFC@TMOs. Electrochemical properties further disclosed that PNCFC-based hybrids exhibit the best lithium storage performance. Furthermore, in situ Raman, XPS and charge redistribution studies not only decipher that strong electronic interaction exists between PNCFC and TMOs but also consistently affirm that such interaction is ascribed to the shift of the p-adsorption energy, facilitating rapid kinetics and leading to improved Li storage properties.
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