Analytical insight into the oxygen diffusion in wetted porous cathodes of Li-air batteries

被引：15

作者：

Ye, Luhan ^{[1
]}

Wang, Xiaoning ^{[1
]}

Lv, Weiqiang ^{[1
]}

Fei, Jipeng ^{[1
]}

Zhu, Gaolong ^{[1
]}

Liang, Yachun ^{[1
]}

Song, Yuanqiang ^{[1
]}

Zhai, Junyi ^{[2
]}

He, Weidong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol, Sch Energy Sci & Engn, Chengdu 611731, Sichuan, Peoples R China

[2] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China

来源：

ENERGY | 2015年 / 93卷

关键词：

Lithium-air battery; Porous cathode; Diffusivity; Limiting current; Concentration polarization; LI-O-2; BATTERY; LITHIUM; PERFORMANCE;

D O I：

10.1016/j.energy.2015.09.054

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Lithium-air batteries have attracted extensive attention in the general energy field. To enhance the practical applicability of lithium-air batteries, the overpotential caused by the diffusion of oxygen in the cathode, a significant component of the total overpotential, should be well comprehended. In this work, a wetted model is derived to evaluate the energy loss associated with liquid electrolytes. The oxygen diffusion in both electrolytes and porous cathodes is investigated systematically by taking oxygen concentration distribution into account. By analyzing the factors associated with cathode overpotential, such as the cathode thickness of and the viscosity of electrolyte, our work facilitates the improvement in the electrochemical performance of lithium-air batteries. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：416 / 420

页数：5

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