Synthesis and electrochemical characterization of nano-sized Ag₄Sn particles as anode material for lithium-ion batteries

详细信息    查看全文

• 作者：Guido Schmuelling^a ; ^{guido.schmuelling@uni-muenster.de" class="auth_mail" title="E-mail the corresponding author} ; Nikolas Oehl^b ; ; Olga Fromm^a ; Martin Knipper^b ; Joanna Kolny-Olesiak^b ; Thorsten Plaggenborg^b ; Jü ; rgen Parisi^b ; Martin Winter^a ; Tobias Placke^a
• 关键词：Silver ; tin ; nanoparticles ; Ag4Sn ; intermetallic compound ; anode material ; lithium-ion batteries
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 April 2016
• 年：2016
• 卷：196
• 期：Complete
• 页码：597-602
• 全文大小：1490 K

文摘

For the first time, sub 10 nm sized intermetallic Ag₄Sn particles are prepared via an aqueous synthesis route in order to improve the electrochemical performance of pure Sn nanoparticles. High-resolution transmission electron microscopy, X-ray diffraction and thermogravimetric analysis are used to investigate the morphology, crystal structure and particle surface of the as prepared Ag₄Sn nanoparticles. In addition, galvanostatic cycling and cyclic voltammetry measurements are carried out to characterize the electrochemical behavior of the particles. Upon lithiation and de-lithiation a phase transformation from Ag₄Sn to Ag₃Sn is observed, which has not been reported so far. The intermetallic nanoparticle-based anode delivers a specific de-lithiation capacity of 460 mAhg⁻¹ for more than 150 cycles.