Sn buffered by shape memory effect of NiTi alloys as high-performance anodes for lithium ion batteries

Hu, Renzong, Zhu, Min, Wang, Hui, Liu, Jiangwen, Ouyang Liuzhang and Zou, Jin (2012) Sn buffered by shape memory effect of NiTi alloys as high-performance anodes for lithium ion batteries. Acta Materialia, 60 12: 4695-4703. doi:10.1016/j.actamat.2012.05.015


Author Hu, Renzong
Zhu, Min
Wang, Hui
Liu, Jiangwen
Ouyang Liuzhang
Zou, Jin
Title Sn buffered by shape memory effect of NiTi alloys as high-performance anodes for lithium ion batteries
Journal name Acta Materialia   Check publisher's open access policy
ISSN 1359-6454
1873-2453
Publication date 2012-07
Sub-type Article (original research)
DOI 10.1016/j.actamat.2012.05.015
Volume 60
Issue 12
Start page 4695
End page 4703
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
By applying the shape memory effect of the NiTi alloys to buffer the Sn anodes, we demonstrate a simple approach to overcome a long-standing challenge of Sn anode in the applications of Li-ion batteries - the capacity decay. By supporting the Sn anodes with NiTi shape memory alloys, the large volume change of Sn anodes due to lithiation and delithiation can be effectively accommodated, based on the stress-induced martensitic transformation and superelastic recovery of the NiTi matrix respectively, which leads to a decrease in the internal stress and closing of cracks in Sn anodes. Accordingly, stable cycleability (630 mA h g -1 after 100 cycles at 0.7C) and excellent high-rate capabilities (478 mA h g -1 at 6.7C) were attained with the NiTi/Sn/NiTi film electrode. These shape memory alloys can also combine with other high-capacity metallic anodes, such as Si, Sb, Al, and improve their cycle performance.
Keyword Lithium ion battery
Sn anode
Shape memory alloy
Stress
Martensitic transformation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 24 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 15 Nov 2012, 15:12:10 EST by System User on behalf of Centre for Microscopy and Microanalysis