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Title: A hybrid Li-air battery with buckypaper air cathode and sulfuric acid electrolyte

Abstract

We demonstrate a type of carbon nanotube based buckypaper cathode in a hybrid electrolyte Li-air battery (HyLAB) that showed outstanding discharging performances. The HyLAB has sulfuric acid as the catholyte and a large active electrode area (10 cm(2)). The active cathode layer was made from a buckypaper with 5 wt.% Pt supported on carbon nanotubes (Pt/CNTs) for oxygen reduction and evolution. A similar cathode was constructed with a catalyst of 5 wt.% Pt supported on carbon black (Pt/CB). It is demonstrated that sulfuric acid can achieve high discharging current densities while maintaining relatively high cell potentials. The cell with Pt/CNTs showed a much better performance than with Pt/CB at high current densities. The HyLAB with Pt/CNTs achieved a discharging capacity of 306 mAh/g and a cell voltage of 3.15 V at 0.2 mA/cm(2). The corresponding specific energy is 1067 Wh/kg based on the total weight of the sulfuric acid. Slow decrease in performance was observed, but it can be recovered by refilling the cell with new electrolyte after continuous discharging of more than 75 h. A charge-discharge experiment at 0.2 mA/cm(2) showed that the cell was rechargeable with a capacity of more than 300 mAh/g. (c) 2012 Elsevier Ltd. Allmore » rights reserved.« less

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1211036
DOE Contract Number:  
DE-AR0000066
Resource Type:
Journal Article
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 81; Journal ID: ISSN 0013-4686
Country of Publication:
United States
Language:
English

Citation Formats

Li, YF, Huang, K, and Xing, YC. A hybrid Li-air battery with buckypaper air cathode and sulfuric acid electrolyte. United States: N. p., 2012. Web. doi:10.1016/j.electacta.2012.07.060.
Li, YF, Huang, K, & Xing, YC. A hybrid Li-air battery with buckypaper air cathode and sulfuric acid electrolyte. United States. doi:10.1016/j.electacta.2012.07.060.
Li, YF, Huang, K, and Xing, YC. Tue . "A hybrid Li-air battery with buckypaper air cathode and sulfuric acid electrolyte". United States. doi:10.1016/j.electacta.2012.07.060.
@article{osti_1211036,
title = {A hybrid Li-air battery with buckypaper air cathode and sulfuric acid electrolyte},
author = {Li, YF and Huang, K and Xing, YC},
abstractNote = {We demonstrate a type of carbon nanotube based buckypaper cathode in a hybrid electrolyte Li-air battery (HyLAB) that showed outstanding discharging performances. The HyLAB has sulfuric acid as the catholyte and a large active electrode area (10 cm(2)). The active cathode layer was made from a buckypaper with 5 wt.% Pt supported on carbon nanotubes (Pt/CNTs) for oxygen reduction and evolution. A similar cathode was constructed with a catalyst of 5 wt.% Pt supported on carbon black (Pt/CB). It is demonstrated that sulfuric acid can achieve high discharging current densities while maintaining relatively high cell potentials. The cell with Pt/CNTs showed a much better performance than with Pt/CB at high current densities. The HyLAB with Pt/CNTs achieved a discharging capacity of 306 mAh/g and a cell voltage of 3.15 V at 0.2 mA/cm(2). The corresponding specific energy is 1067 Wh/kg based on the total weight of the sulfuric acid. Slow decrease in performance was observed, but it can be recovered by refilling the cell with new electrolyte after continuous discharging of more than 75 h. A charge-discharge experiment at 0.2 mA/cm(2) showed that the cell was rechargeable with a capacity of more than 300 mAh/g. (c) 2012 Elsevier Ltd. All rights reserved.},
doi = {10.1016/j.electacta.2012.07.060},
journal = {Electrochimica Acta},
issn = {0013-4686},
number = ,
volume = 81,
place = {United States},
year = {2012},
month = {10}
}