Effect of PS-PVD production throughput on Si nanoparticles for negative electrode of lithium ion batteries. (16th February 2018)

• Record Type: Journal Article
• Authors: Ohta, R; Fukada, K; Tashiro, T; Dougakiuchi, M; Kambara, M
• Is Part Of: Journal of physics. Volume 51:Number 10(2018)
• Publication Date: 2018-02-16
• Subjects: lithium ion batteries -- silicon nanoparticle -- plasma spray physical vapor deposition; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aaab37
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Silicon nanoparticles (Si-NPs) have been produced by plasma spray physical vapor deposition at throughput as high as 1 kg h −1 (17 g min −1 ) and the effect on the battery performance is investigated. When the Si powder feed-rate is changed from 1 to 17 g min −1, although the average primary particle size increases to 50 nm, the cycle capacity of the batteries using these Si-NPs is improved slightly owing to their less agglomerated structure. In contrast, when Ni is added to Si feedstock, the cycle capacity is improved at 1 g min −1 due to modified Si-NP structure having SiNi2 interface. Whereas, the batteries with the Si-NP produced at 17 g min −1 shows significant decrease in the cycle capacity because of the excess Ni silicide formation that is resulted from the elevated co-condensation point and the increased reaction area at high throughputs despite the constant Ni concentration in the feedstock.