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dc.contributor.authorCui, Jinlongen_US
dc.contributor.authorYang, Jiachaoen_US
dc.contributor.authorMan, Jianzongen_US
dc.contributor.authorLi, Shaohuien_US
dc.contributor.authorYin, Jinpengen_US
dc.contributor.authorMa, Litongen_US
dc.contributor.authorHe, Wenxiuen_US
dc.contributor.authorSun, Juncaien_US
dc.contributor.authorHu, Jiangliangen_US
dc.identifier.citationCui, J., Yang, J., Man, J., Li, S., Yin, J., Ma, L., He, W., Sun, J. & Hu, J. (2019). Porous Al/Al2O3 two-phase nanonetwork to improve electrochemical properties of porous C/SiO2 as anode for Li-ion batteries. Electrochimica Acta, 300, 470-481.
dc.description.abstractAlthough C/SiOx (0 < x ≤ 2) composites are considered promising candidates as next-generation anode materials, their lower initial Coulombic efficiency and poor cycling stability seriously limit their commercial applications. In this study, a smooth porous Al2O3 protective layer containing pure Al is introduced onto the surfaces of porous C/SiO2 composites and the inside walls of their pores to prepare Al-doped porous C/SiO2 composites via a high-temperature solid-state method. This porous Al/Al2O3 two-phase network, ∼4 nm in thickness, is effective in obstructing the formation of a thick solid-electrolyte interface film and the dissolution of electrode materials by HF during cycling, thus significantly heightening the initial Coulombic efficiency and cycling stability of the porous C/SiO2 electrode. The pure Al nanoparticles in this Al/Al2O3 nanonetwork also enhance the electronic conductivity of the Al2O3 protective layer. When used as anode materials for Li-ion batteries, the resulting composites deliver a reversible specific capacity of 1385 mAh/g at a current density of 0.1 A/g, with an improved initial Coulombic efficiency of 80.47%, compared to that of porous C/SiO2 (41.90%). Even at 1.6 A/g, the specific capacity is also maintained at 583.1 mAh/g with a capacity loss of only 4.08% after 1200 cycles.en_US
dc.relation.ispartofElectrochimica Actaen_US
dc.rights© 2019 Elsevier Ltd. All rights reserved.en_US
dc.titlePorous Al/Al2O3 two-phase nanonetwork to improve electrochemical properties of porous C/SiO2 as anode for Li-ion batteriesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsLi-ion Batteriesen_US
dc.description.acknowledgementFinancial support from the National Natural Science Foundation of China (No. 51479019, 21766025 and 21766024) are gratefully acknowledged.en_US
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