Electrochemical Analysis the influence of Propargyl Methanesulfonate as Electrolyte Additive for Spinel LTO Interface Layer

被引：33

作者：

Wang, Renheng ^{[1
,3
]}

Wang, Zhixing ^{[2
]}

Li, Xinhai ^{[2
]}

Zhang, Han ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

[2] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

[3] Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore

来源：

ELECTROCHIMICA ACTA | 2017年 / 241卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Non-aqueous electrolyte; Spinel lithium titanate; Solid electrolyte interphase layer; Elevated temperature property; Propargyl methanesulfonate; P-TOLUENESULFONYL ISOCYANATE; LITHIUM-ION BATTERIES; RATE ANODE; LI4TI5O12; PERFORMANCE; CELLS; CONDUCTIVITY; SPECTROSCOPY; REACTIVITY; CATHODE;

D O I：

10.1016/j.electacta.2017.04.125

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Propargyl methanesulfonate (PMS) is chosen as an electrolyte additive to study the interfacial performance between the electrolyte and spinel lithium titanate (Li4Ti5O12, LTO) electrode. The result displays that PMS can improve cyclability of Li/LTO cell. Very interestingly, a solid electrolyte interface (SEI) film is formed above 1.0 V in the voltage range of 3.0-0 V. The observations are explained in terms of PMS include triple-bonded compounds and SO3. The triple-bonded compounds were able to produce a characteristic SEI with dense and low impedance, which can effectively suppress the decomposition of electrolyte, HF generation and LiF formation upon cycling. The S = O groups may acts as the weak base site to hinder the reactivity of PF5. Accordingly, the incorporation of PMS into the electrolyte can remarkably enhance the cyclic performance of the Li/LTO cell. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：208 / 219

页数：12

共 48 条

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