High Voltage LiNi0.5Mn0.3Co0.2O2/Graphite Cell Cycled at 4.6 V with a FEC/HFDEC-Based Electrolyte

被引：120

作者：

He, Meinan ^{[1
,2
]}

Su, Chi-Cheung ^{[1
]}

Feng, Zhenxing ^{[3
]}

Zeng, Li ^{[4
]}

Wu, Tianpin ^{[5
]}

Bedzyk, Michael J. ^{[4
,6
]}

Fenter, Paul ^{[1
]}

Wang, Yan ^{[2
]}

Zhang, Zhengcheng ^{[1
]}

机构：

[1] Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Argonne, IL 60439 USA

[2] Worcester Polytech Inst, Dept Mech Engn, 100 Inst Rd, Worcester, MA 01609 USA

[3] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA

[4] Northwestern Univ, Appl Phys Program, Evanston, IL 60208 USA

[5] Argonne Natl Lab, Xray Sci Div, 9700 South Cass Ave, Argonne, IL 60439 USA

[6] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

ADVANCED ENERGY MATERIALS | 2017年 / 7卷 / 15期

关键词：

LITHIUM-ION BATTERY; CHARGE COMPENSATION MECHANISM; FLUORINATED ELECTROLYTES; CATHODE MATERIALS; PERFORMANCE; ADDITIVES; TEMPERATURE; SEPARATORS; STABILITY; LICOO2;

D O I：

10.1002/aenm.201700109

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

A high voltage LiNi0.5Mn0.3Co0.2O2/graphite cell with a fluorinated electrolyte formulation 1.0 m LiPF6 fluoroethylene carbonate/bis(2,2,2-trifluoroethyl) carbonate is reported and its electrochemical performance is evaluated at cell voltage of 4.6 V. Comparing with its nonfluorinated electrolyte counterpart, the reported fluorinated one shows much improved Coulombic efficiency and capacity retention when a higher cut-off voltage (4.6 V) is applied. Scanning electron microscopy/energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy data clearly demonstrate the superior oxidative stability of the new electrolyte. The structural stability of the bulk cathode materials cycled with different electrolytes is extensively studied by X-ray absorption near edge structure and X-ray diffraction.

引用

页数：9

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