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 | |
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 .
Funders | Funder number |
---|---|
National Natural Science Foundation of China | 50954005, 51074011 |
Ministry of Education of the People's Republic of China | |
Beihang University | |
National High-tech Research and Development Program | 2006AA03Z230, 2008AA03Z208 |
National Key Research and Development Program of China | 2007CB936502 |
Keywords
- Chemical etching
- Lithium ion battery
- Nanocones array
- Silicon anode