Dilithium phthalocyanine as a catalyst for oxygen reduction in non-aqueousLi-O2cells

Author:

Selvaraj C.1,Munichandraiah N.1,Scanlon L.G.2

Affiliation:

1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India

2. Air Force Research Laboratory, Thermal and Electrochemical Branch, Wright-Patterson Air Force Base, Ohio 45433, USA

Abstract

The electrochemical performance of Li-O2cells depends mainly on the kinetics of the cathode reaction, namely, oxygen reduction reaction in non-aqueous electrolytes. The catalyst plays an important role on the kinetics of the reaction. In the present work, dilithium phthalocyanine is used as the catalyst in the cathode of Li-O2cells. Dual-layer O2electrodes are fabricated employing a high surface area microporous carbon with Ni gauge current collector present between the two layers. Discharge capacity of Li-O2cell measured at 0.2 mA.cm-2is about 30 mAh.cm-2. Phthalocyanine ring is considered to interact with O2producing Li2Pc- O2as a reaction intermediate, which facilitates the electron-transfer reaction.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Chemistry

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