High voltage LIB cathodes enabled by salt-reinforced liquid electrolytes

被引：20

作者：

Lu, Yingying ^{[1
]}

Xu, Shaomao ^{[1
]}

Shu, Jonathan ^{[2
]}

Aladat, Wajdi Issam A. ^{[1
]}

Archer, Lynden A. ^{[1
]}

机构：

[1] Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14853 USA

[2] Cornell Univ, Cornell Ctr Mat Res, Ithaca, NY 14853 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2015年 / 51卷

基金：

美国国家科学基金会;

关键词：

Lithium-ion battery; High voltage cathode; Lithium fluoride; LITHIUM; CHALLENGES;

D O I：

10.1016/j.elecom.2014.11.010

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report on electrochemical properties of Li/Li1.2Ni0.15Co0.1Mn0.55O2 secondary batteries in electrolytes designed to stabilize electrodeposition of lithium. Ethylene carbonate (EC): dimethyl carbonate (DMC) containing a LiPF6/LiF salt blend stabilizes lithium electrodeposition and enables Li/Li1.2Ni0.15Co0.1Mn0.55O2 batteries with a high discharge capacity of 270 mAh.g(-1) at 0.05 mA cm(-2). Cells containing the LiF-reinforced electrolytes also exhibit excellent capacity retention over 500 cycles with Columbic efficiencies approaching 100%. Postmortem SEM analysis of the lithium anode shows more compact deposition in the presence of the LiF salt additive, while XPS depth profile analysis of cathodes show a more uniform distribution of Mn over the first 180 nm from the electrode/electrolyte interface. The results imply that LiF reinforced electrolytes simultaneously facilitate stable lithium electrodeposition and reduce Mn dissolution. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：23 / 26

页数：4

共 19 条

[1] A new class of advanced polymer electrolytes and their relevance in plastic-like, rechargeable lithium batteries [J].

Appetecchi, GB ;

Dautzenberg, G ;

Scrosati, B .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (01) :6-12

[2]

Archer L.A., 2014, CORNELL U INVENTION, V5016

[3]

Armand M, 2009, NAT MATER, V8, P621, DOI [10.1038/NMAT2448, 10.1038/nmat2448]

[4] Solid-Electrolyte Interphase Formation and Electrolyte Reduction at Li-Ion Battery Graphite Anodes: Insights from First-Principles Molecular Dynamics [J].

Ganesh, P. ;

Kent, P. R. C. ;

Jiang, De-en .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (46) :24476-24481

[5] Synthesis and characterization of Li2MnxFe1-xSiO4 as a cathode material for lithium-ion batteries [J].

Gong, Z. L. ;

Li, Y. X. ;

Yang, Y. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (12) :A542-A544

[6] Challenges for Rechargeable Li Batteries [J].

Goodenough, John B. ;

Kim, Youngsik .

CHEMISTRY OF MATERIALS, 2010, 22 (03) :587-603

[7] High-voltage lithium cathode materials [J].

Kawai, H ;

Nagata, M ;

Tukamoto, H ;

West, AR .

JOURNAL OF POWER SOURCES, 1999, 81 :67-72

[8] Synthesis and study of new cyclic boronate additives for lithium battery electrolytes [J].

Lee, HS ;

Sun, X ;

Yang, XQ ;

McBreen, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (11) :A1460-A1465

[9] Synthesis and electrochemical performance of the high voltage cathode material Li[Li0.2Mn0.56Ni0.16Co0.08]O2 with improved rate capability [J].

Li, J. ;

Kloepsch, R. ;

Stan, M. C. ;

Nowak, S. ;

Kunze, M. ;

Winter, M. ;

Passerini, S. .

JOURNAL OF POWER SOURCES, 2011, 196 (10) :4821-4825

[10]

Lu YY, 2014, NAT MATER, V13, P961, DOI [10.1038/nmat4041, 10.1038/NMAT4041]

← 1 2 →