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

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

doi:10.1016/j.electacta.2012.04.052

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 journal › Article › peer-review

15 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 language	English
Pages (from-to)	222-226
Number of pages	5
Journal	Electrochimica Acta
Volume	74
DOIs	https://doi.org/10.1016/j.electacta.2012.04.052
State	Published - Jul 15 2012
Externally published	Yes

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 .

Keywords

Chemical etching
Lithium ion battery
Nanocones array
Silicon anode

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10.1016/j.electacta.2012.04.052

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title = "Improved electrochemical performance of nanostructured Si-based films modified by chemical etching",

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.",

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T1 - Improved electrochemical performance of nanostructured Si-based films modified by chemical etching

AU - Du, Zhijia

AU - Zhang, Shichao

AU - Jiang, Tao

AU - Lin, Ruoxu

AU - Zhao, Jianfeng

PY - 2012/7/15

Y1 - 2012/7/15

N2 - 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.

AB - 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.

KW - Chemical etching

KW - Lithium ion battery

KW - Nanocones array

KW - Silicon anode

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DO - 10.1016/j.electacta.2012.04.052

M3 - Article

AN - SCOPUS:84861573311

SN - 0013-4686

VL - 74

SP - 222

EP - 226

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

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

Abstract

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Keywords

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