Influence of EDTA in poly(acrylic acid) binder for enhancing electrochemical performance and thermal stability of silicon anode

被引：31

作者：

Lee, Sun-Young ^{[1
]}

Choi, Yunju ^{[1
]}

Hong, Kyong-Soo ^{[1
]}

Lee, Jung Kyoo ^{[2
]}

Kim, Ju-Young ^{[3
]}

Bae, Jong-Seong ^{[1
]}

Jeong, Euh Duck ^{[1
]}

机构：

[1] Busan Ctr, KBSI, Busan 46742, South Korea

[2] Dong A Univ, Dept Chem Engn, Busan 49315, South Korea

[3] Sch Mat Sci & Engn, Ulsan 44919, South Korea

来源：

APPLIED SURFACE SCIENCE | 2018年 / 447卷

基金：

新加坡国家研究基金会;

关键词：

Si anode; PAA binder; EDTA; Li-ion batteries; Thermal stability; LITHIUM-ION BATTERIES; SI-BASED ANODES; BETA-CYCLODEXTRIN; POLYACRYLIC-ACID; CROSS-LINKING; CARBONATE; POLYMER; NANOCOMPOSITES; ELECTROLYTES; COMPOSITE;

D O I：

10.1016/j.apsusc.2018.04.004

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 crucial roles of ethylenediaminetetraacetic acid (EDTA) in the poly(acrylic acid) (PAA)-binder system were investigated for the high electrochemical performance silicon anode in lithium-ion batteries. The EDTA supports the construction of a mechanically robust network through the formation of sbndCOOH linkage with the SiO2 layer of the Si nanoparticles. The mixture of the PAA/EDTA binder and the conductive agent exhibited an improved elastic modulus and peeling strength. The creation of hydrogen fluoride (HF) was effectively suppressed through the elimination of the H2O. An H2O-phosphorous pentafluoride (PF5) reaction, which is known for its use in the etching of metal oxides including its creation of the solid electrolyte interphase (SEI) layer, generates the HF. A remarkably sound cyclability with a discharge capacity of 2540 mA h g(-1) was achieved as a result of the synergistic effect between robust mechanical properties and suppression of the HF creation for the stability of the SEI layer. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：442 / 451

页数：10

共 44 条

[1] Polydopamine Wrapping Silicon Cross-linked with Polyacrylic Acid as High-Performance Anode for Lithium-Ion Batteries [J].