کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1641339 | 1517212 | 2016 | 4 صفحه PDF | دانلود رایگان |
• The samples show nanowire morphology and strong interaction with carbon.
• CCH/C-based cathode shows reduced overpotential and greater specific capacity.
• The cell with CCH/C catalyst shffigows much prolonged cycle life.
Cobalt carbonate hydroxide (CCH) composited with XC-72R carbon was synthesized via a simple hydrothermal process. Transmission electron microscopes(TEM) shows that CCH with nanowire morphology is well dispersed in carbon medium. The CCH/C-based oxygen cathode exhibited low polarization with specific capacity of 3500 mA h g−1 at a current density of 0.05 mA cm−2 and prolonged cycling life. The cell with CCH/C catalyst can run for 55 cycles before the terminal potential of discharge declines to 2.0 V with a limited specific capacity of 500 mA h g−1. The improved performance was mainly attributed to the excellent OER activity of CCH/C that Li2O2 can be decomposed in lower potential, which might help avoid generation of undesirable byproducts.
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Journal: Materials Letters - Volume 176, 1 August 2016, Pages 97–100