3D deposition of LiMn2O4:: enhancement of lithium battery performance

被引：22

作者：

Eftekhari, A ^{[1
]}

机构：

[1] Electrochem Res Ctr, Tehran, Iran

来源：

SOLID STATE IONICS | 2003年 / 161卷 / 1-2期

关键词：

lithium batteries; surface structure; cathode material; fractal dimension; discharge capacity; 3D deposition;

D O I：

10.1016/S0167-2738(03)00278-9

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：

A film of LiMn2O4 with 3D macroporous structure was deposited on a substrate surface during gold codeposition. Fractal analysis of the LiMn2O4 suggested a 3D structure for the film deposited with a fractal dimension approaching 3. Battery performance of a lithium secondary cell employing the 3D LiMn2O4 cathode was investigated and compared with that of using a conventional LiMn2O4 cathode. The results indicated that the 3D cathode fabricated has higher capacity in comparison with the conventional cathode. It is due to the existence of higher surface area for lithium intercalation/deintercalation processes. Indeed, 3D structure of the electrode provides chance for the Li deintercalation in three directions. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：41 / 47

页数：7

共 27 条

[1] Variations of the electrochemical properties of LiMn2O4 with synthesis conditions [J].

Ahn, D ;

Song, M .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (03) :874-879

[2] MOLECULAR FRACTAL SURFACES [J].

AVNIR, D ;

FARIN, D ;

PFEIFER, P .

NATURE, 1984, 308 (5956) :261-263

[3] Electrochemical deposition of macroporous platinum, palladium and cobalt films using polystyrene latex sphere templates [J].

Bartlett, PN ;

Birkin, PR ;

Ghanem, MA .

CHEMICAL COMMUNICATIONS, 2000, (17) :1671-1672

[4] Physical and electrochemical characterization of nanocrystalline LiMn2O4 prepared by a modified citrate route [J].

Choy, JH ;

Kim, DH ;

Kwon, CW ;

Hwang, SJ ;

Kim, YI .

JOURNAL OF POWER SOURCES, 1999, 77 (01) :1-11

[5]

DEGENNES PG, 1982, CR ACAD SCI II, V295, P1061

[6] On the fractal study of LiMn2O4 electrode surface [J].

Eftekhari, A .

ELECTROCHIMICA ACTA, 2003, 48 (19) :2831-2839

[7] Mixed-metals codeposition as a novel method for the preparation of LiMn2O4 electrodes with reduced capacity fades [J].

Eftekhari, A .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (07) :A966-A969

[8] Enhanced stability of hexacyanoferrate-based modified electrodes prepared under centrifugal fields [J].

Eftekhari, A .

MENDELEEV COMMUNICATIONS, 2002, (05) :206-207

[9] Fractal study of LiMn2O4 film electrode surface for lithium batteries application (vol 47, pg 4347, 2001) [J].

Eftekhari, A .

ELECTROCHIMICA ACTA, 2002, 48 (03) :290-290

[10] Effect of centrifugal fields on the solid-state film formation as applied to gold electrodeposits [J].

Eftekhari, A .

MENDELEEV COMMUNICATIONS, 2002, (03) :122-123

← 1 2 3 →