Electrochemical properties of Si film electrodes with TiNi shape memory alloy as a current collector

被引：6

作者：

Cho, Gyu-bong ^{[1
]}

Kim, Bo-min ^{[1
]}

Noh, Jung-pil ^{[1
]}

Im, Yeon-min ^{[1
]}

Lee, Sang-hun ^{[1
]}

Kim, Ki-won ^{[1
]}

Nam, Tae-hyun ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, WCU Ctr Next Generat Batteries, Sch Mat Sci & Engn, Jinju 660701, Gyeongnam, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷

基金：

新加坡国家研究基金会;

关键词：

Si electrode; Shape memory alloy; Current collector; Anode; Stress; LI-ION BATTERIES; AMORPHOUS-SILICON; RECHARGEABLE BATTERIES; THIN-FILMS; ANODE; NI; INSERTION/EXTRACTION; DEPOSITION; CAPACITY;

D O I：

10.1016/j.jallcom.2011.12.173

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical and structural properties of Si thin film electrodes using a TiNi shape memory alloy as a current collector (substrate) are investigated with and without annealing. Annealed Si film electrodes exhibit an initial efficiency of 87% and a charge capacity retention (at the 50th cycle) of 85%. XRD results of the annealed Si film electrode during the charge-discharge process reveal the phase transformation (stress accommodation) of the TiNi substrate: cubic TiNi (initial) to monoclinic TiNi (after charge) and back to cubic TiNi (after discharge). SEM results of the annealed Si electrode show a remarkable reduction in structural damage of the Si film as compared to the as-deposited Si film electrode. The good electrochemical performances are ascribed to the high structural stability enhanced by both the post-annealing and stress accommodation of the TiNi substrate. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：S190 / S194

页数：5

共 20 条

[1] Amorphous silicon thin films as a high capacity anodes for Li-ion batteries in ionic liquid electrolytes [J].