Improved electrochemical performance of nanostructured Si-based films modified by chemical etching

Zhijia Du, Shichao Zhang, Tao Jiang, Ruoxu Lin, Jianfeng Zhao

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Chemical etching is introduced into the nanocones array supported silicon films to improve the lithium storage properties for Li-ion batteries. With the directional removal of some silicon, enough space is left between adjacent Si nanopillars. The Ni nanocones array enhances the electron conductivity and the interfacial strength to facilitate the electron collection and avoid the delamination. The space accommodates the volume expansion and allows the penetration of electrolyte into the inner of the electrode. This new type of nanostructured Si anodes delivers a high discharge capacity of ∼2900 mAh g -1 (at 0.2 C) and excellent cycling stability for a prolonged 200 cycles. The electrode also demonstrates appealing rate capability. The remarkable performance of nanostructured Si anode indicates the potential of its application as electrode materials for high performance energy storage.

Original languageEnglish
Pages (from-to)222-226
Number of pages5
JournalElectrochimica Acta
Volume74
DOIs
StatePublished - Jul 15 2012
Externally publishedYes

Funding

This work was supported by the National Natural Science Foundation of China ( 50954005 , 51074011 ), National Basic Research Program of China ( 2007CB936502 ) and National 863 Program ( 2006AA03Z230 , 2008AA03Z208 ), and the Innovation Foundation of BUAA for Ph.D. graduates as well as the Scholarship Award for Excellent Doctoral Student granted by China Ministry of Education .

FundersFunder number
National Natural Science Foundation of China50954005, 51074011
Ministry of Education of the People's Republic of China
Beihang University
National High-tech Research and Development Program2006AA03Z230, 2008AA03Z208
National Key Research and Development Program of China2007CB936502

    Keywords

    • Chemical etching
    • Lithium ion battery
    • Nanocones array
    • Silicon anode

    Fingerprint

    Dive into the research topics of 'Improved electrochemical performance of nanostructured Si-based films modified by chemical etching'. Together they form a unique fingerprint.

    Cite this