Structure of liquid PEO-LiTFSI electrolyte

被引：169

作者：

Mao, GM

Saboungi, ML

Price, DL

Armand, MB

Howells, WS

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Univ Montreal, Dept Chem, Montreal, PQ H3C 3J7, Canada

[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.84.5536

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The structure of a polymer electrolyte, P(EO)(7.5)LiN(SO2CF3)(2), has been determined by neutron diffraction with isotropic substitution. The Li ions are bonded on average to five ether oxygens belonging to pairs of PEO coils. These are arranged with a considerable degree of extended-range order providing pathways for the Li ion conduction. The lack of ion pairing in this system below 4.8 Angstrom is reminiscent of that observed in the remarkable structure of P(EO)(6)LiAsF6 and implies that anions and cations are free to migrate independently.

引用

收藏

页码：5536 / 5539

页数：4

相关论文

共 24 条

[1] Structure of the polymer electrolyte poly(ethylene oxide)(3): LiN(SO2CF3)(2) determined by powder diffraction using a powerful Monte Carlo approach [J].

Andreev, YG ;

Lightfoot, P ;

Bruce, PG .

CHEMICAL COMMUNICATIONS, 1996, (18) :2169-2170

[2] Ab initio solution of a complex crystal structure from powder-diffraction data using simulated-annealing method and a high degree of molecular flexibility [J].

Andreev, YG ;

MacGlashan, GS ;

Bruce, PG .

PHYSICAL REVIEW B, 1997, 55 (18) :12011-12017

[3]

ARMAND M, 1990, P 2 INT S POL EL, P91

[4] LOCAL AND INTERMEDIATE-RANGE ORDER IN CESIUM GERMANATE GLASS [J].

ARMAND, P ;

BENO, M ;

ELLISON, AJG ;

KNAPP, GS ;

PRICE, DL ;

SABOUNGI, ML .

EUROPHYSICS LETTERS, 1995, 29 (07) :549-553

[5] Li+-(diglyme)2 and LiClO4-diglyme complexes:: Barriers to lithium ion migration [J].

Baboul, AG ;

Redfern, PC ;

Sutjianto, A ;

Curtiss, LA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (31) :7220-7227

[6]

BABOUL AG, COMMUNICATION

[7] Electrochemistry of liquids vs. solids: Polymer electrolytes [J].

Baril, D ;

Michot, C ;

Armand, M .

SOLID STATE IONICS, 1997, 94 (1-4) :35-47

[8] MICROSCOPIC INVESTIGATION OF IONIC-CONDUCTIVITY IN ALKALI-METAL SALTS POLY(ETHYLENE OXIDE) ADDUCTS [J].

BERTHIER, C ;

GORECKI, W ;

MINIER, M ;

ARMAND, MB ;

CHABAGNO, JM ;

RIGAUD, P .

SOLID STATE IONICS, 1983, 11 (01) :91-95

[9] Molecular dynamics simulations of poly(ethylene oxide)/LiI melts. 1. Structural and conformational properties [J].

Borodin, O ;

Smith, GD .

MACROMOLECULES, 1998, 31 (23) :8396-8406

[10] Neutron-scattering studies of a polymer electrolyte, PPO-LiClO4 [J].

Carlsson, P ;

Mattsson, B ;

Swenson, J ;

Torell, LM ;

Käll, M ;

Börjesson, L ;

McGreevy, RL ;

Mortensen, K ;

Gabrys, B .

SOLID STATE IONICS, 1998, 113 :139-147