title: Hollow porous SiO2 nanocubes towards high-performance anodes for lithium-ion batteries.
abstract: The high theoretical capacity and low discharge potential of silicon have attracted much attention on Si-based anodes. Herein, hollow porous SiO2 nanocubes have been prepared via a two-step hard-template process and evaluated as electrode materials for lithium-ion batteries. The hollow porous SiO2 nanocubes exhibited a reversible capacity of 919 mAhg(-1) over 30 cycles. The reasonable property could be attributed to the unique hollow nanostructure with large volume interior and numerous crevices in the shell, which could accommodate the volume change and alleviate the structural strain during Li ions' insertion and extraction, as well as allow rapid access of Li ions during charge/discharge cycling. It is found that the formation of irreversible or reversible lithium silicates in the anodes determines the capacity of a deep-cycle battery, fast transportation of Li ions in hollow porous SiO2 nanocubes is beneficial to the formation of Li2O and Si, contributing to the high reversible capacity.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science & Engineering, and Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China.
authors.forename: Nan
authors.initials: N
authors.lastname: Yan
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Zhong
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Qianwang
authors.initials: Q
authors.lastname: Chen
references.citation: Nat Mater. 2010 Apr;9(4):353-8
references.pmid: 20228818
references.citation: ChemSusChem. 2012 Feb 13;5(2):400-3
references.pmid: 22262646
references.citation: Nano Lett. 2011 Jul 13;11(7):2949-54
references.pmid: 21668030
references.citation: Adv Mater. 2012 Feb 21;24(8):1111-6
references.pmid: 22271299
references.citation: Nature. 2008 Feb 7;451(7179):652-7
references.pmid: 18256660
references.citation: Chem Soc Rev. 2011 Nov;40(11):5472-91
references.pmid: 21799974
references.citation: Angew Chem Int Ed Engl. 2008;47(16):2930-46
references.pmid: 18338357
references.citation: Adv Mater. 2012 Aug 8;24(30):4124-9
references.pmid: 22311574
references.citation: Nat Nanotechnol. 2012 Mar 25;7(5):310-5
references.pmid: 22447161
references.citation: Sci Rep. 2012;2:986
references.pmid: 23248749
references.citation: Inorg Chem. 2004 Aug 23;43(17):5442-9
references.pmid: 15310226
references.citation: Nano Lett. 2012 May 9;12(5):2318-23
references.pmid: 22486769
references.citation: Chemistry. 2012 Nov 19;18(47):15049-56
references.pmid: 23032561
references.citation: Nano Lett. 2012 Jun 13;12(6):3315-21
references.pmid: 22551164
references.citation: Nat Nanotechnol. 2008 Jan;3(1):31-5
references.pmid: 18654447
references.citation: Adv Mater. 2012 Apr 10;24(14):1903-11
references.pmid: 22574316
references.citation: Angew Chem Int Ed Engl. 2012 Mar 5;51(10):2409-13
references.pmid: 22287200
references.citation: J Am Chem Soc. 2011 Nov 2;133(43):17146-8
references.pmid: 21977903
references.citation: Chemistry. 2012 Jul 16;18(29):8971-7
references.pmid: 22707431