Development of a high-performance anode for lithium ion batteries using novel ordered mesoporous tungsten oxide materials with high electrical conductivity

被引：145

作者：

Yoon, Songhun ^{[1
]}

Jo, Changshin ^{[2
]}

Noh, Soon Young ^{[1
]}

Lee, Chul Wee ^{[1
]}

Song, Jun Ho ^{[3
]}

Lee, Jinwoo ^{[2
]}

机构：

[1] KRICT, Green Chem Technol Div, Taejon 305600, South Korea

[2] Pohang Univ Sci & Technol, Dept Chem Engn, Kyungbuk 790784, South Korea

[3] Korea Elect Technol Inst, Green Energy Res Ctr, Songnam 463816, Gyeonggi Do, South Korea

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 23期

关键词：

NEGATIVE-ELECTRODE MATERIALS; POSITIVE ELECTRODE; SPIN-RESONANCE; METATHESIS; GRAPHITE; TRIOXIDE; SAFETY;

D O I：

10.1039/c1cp20940j

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：

An ordered mesoporous WO3-X with high electrical conductivity (m-WO3-X) was prepared and evaluated as an anode material for lithium ion batteries (LIBs). Ordered mesoporous tungsten trioxide (m-WO3) with an identical pore structure to that of m-WO3-X and bulk WO3-X (b-WO3-X) was prepared for the comparison purpose. An m-WO3-X electrode exhibited a high reversible capacity (748 mAh g(-1), 6.5 Li/W) and a high volumetric capacity (similar to 1500 mAh cm(-3)), which is comparable to the Li metal itself (ca. 2000 mAh cm(-3)). Also, an improved rate capability and a good cyclability were observed in the m-WO3-X electrode when compared with m-WO3 and b-WO3-X electrodes. From electrochemical impedance spectroscopy (EIS) analysis, the advanced anode performance of the m-WO3-X electrode was probably attributed to large ordered mesopores and a high electrical conductivity. Differential scanning calorimetry (DSC) result displayed that the safety of m-WO3-X was more improved than those of graphite and Si anode materials.

引用

页码：11060 / 11066

页数：7

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