Improvement of Electrode/Electrolyte Interfaces in High-Voltage Spinel Lithium-Ion Batteries by Using Glutaric Anhydride as Electrolyte Additive

被引：93

作者：

Bouayad, H. ^{[1
]}

Wang, Z. ^{[2
]}

Dupre, N. ^{[2
,5
,6
]}

Dedryvere, R. ^{[1
,5
,6
]}

Foix, D. ^{[1
,5
,6
]}

Franger, S. ^{[3
]}

Martin, J. -F. ^{[4
]}

Boutafa, L. ^{[4
]}

Patoux, S. ^{[4
]}

Gonbeau, D. ^{[1
,5
,6
]}

Guyomard, D. ^{[2
,5
,6
]}

机构：

[1] Univ Pau, CNRS UMR 5254, IPREM ECP, Pau, France

[2] Univ Nantes, CNRS UMR 6502, Inst Mat Jean Rouxel, Nantes, France

[3] Univ Paris Sud, CNRS UMR 8182, ICMMO EPCES, Orsay, France

[4] CEA, LITEN, Grenoble, France

[5] Alistore European Res Inst, F-80039 Amiens, France

[6] FR CNRS 3459, Reseau Stockage Electrochim Energie RS2E, Toulouse, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 09期

关键词：

MAS NMR; SUCCINIC ANHYDRIDE; CATHODE MATERIALS; LI-7; TRANSITION; LAYERS; DEINTERCALATION; CONDUCTIVITY; SPECTROSCOPY; IMPEDANCE;

D O I：

10.1021/jp5001573

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：

High-voltage spinet oxides combined with Li4Ti5O12 result in 3 V Li-ion batteries with a high power capability, but electrochemical performances are limited by electrode/electrolyte interfacial reactivity at high potential. We have investigated glutaric anhydride (GA) as an electrolyte additive to improve the performances of LiNi0.4Mn1.6O4/ Li4Ti5O12 cells. We showed that GA efficiently reduces both the capacity fading upon cycling and the self-discharge. From X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance (NMR), and electrochemical impedance spectroscopy (EIS) measurements, we showed that GA reduces salt (LiPF6) degradation. Addition of 2% GA in the electrolyte results in a passivation film at the surface of both electrodes, which is mainly composed of organic compounds resulting from degradation of GA. The film is much thicker but less resistive due to a better ionic conductivity, and behaves like a polymer electrolyte interface.

引用

页码：4634 / 4648

页数：15

共 38 条

[31] IMPEDANCE OF LITHIUM ELECTRODES IN A PROPYLENE CARBONATE ELECTROLYTE [J].