Optimization of carbon coating thickness to prevent crack generation in Sn nanoparticles during charge/discharge process and their electrochemical properties

被引：3

作者：

Choi, Ji-Seub ^{[1
,2
]}

Lee, Yeon-Ju ^{[1
,2
]}

Lee, Hoi-Jin ^{[1
,2
]}

Cho, Gyu-Bong ^{[1
,2
]}

Byeon, Jai-Won ^{[3
]}

Ahn, Hyo-Jun ^{[1
,2
]}

Kim, Ki-Won ^{[1
,2
]}

Ahn, Jou-Hyeon ^{[1
,2
,4
]}

Cho, Kwon-Koo ^{[1
,2
]}

机构：

[1] Gyeongsang Natl Univ, Dept Mat Engn & Convergence Technol, 501 Jinju Daero, Jinju 52828, South Korea

[2] Gyeongsang Natl Univ, RIGET, 501 Jinju Daero, Jinju 52828, South Korea

[3] Seoul Natl Univ Sci & Technol, Dept Mat Sci & Engn, 138 Gongneung Gil, Seoul 139743, South Korea

[4] Gyeongsang Natl Univ, Dept Chem Engn, 501 Jinju Daero, Jinju 52828, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 843卷

基金：

新加坡国家研究基金会;

关键词：

Sn/carbon nanoparticle; Carbon coating; Pulsed wire explosion; Acoustic emission analysis; Lithium-ion battery; HIGH-PERFORMANCE ANODE; DOPED POROUS CARBON; LONG-CYCLE; ION; BATTERY; TIN; ELECTRODES; NANOCOMPOSITE; LITHIATION;

D O I：

10.1016/j.jallcom.2020.155892

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：

One of the drawback of Tin (Sn) as anode material for Li-ion batteries (LIBs) is severe capacity fading due to pulverization of Sn particles during cycling. Many researchers have tried to solve this problem through various carbon coating on the surface of Sn particles. In this work, Sn/Carbon nanoparticles having various carbon coating thicknesses (0.0-7.0 nm) on the surface of Sn nanoparticles was fabricated by using pulsed wire explosion within various alcohol-based liquid media. The optimum carbon coating thickness needed to prevent crack of Sn nanoparticles was investigated. It was also investigated on when the cracks occurred during cycling using electrochemical analysis and acoustic emission signal analysis. It was found that around 95% of the crack is detected in the first cycling and the appropriate thickness of the carbon layer for the crack suppression is more than 5 nm. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：6

共 32 条

[1] High-rate, long cycle-life Li-ion battery anodes enabled by ultrasmall tin-based nanoparticles encapsulation [J].