| 原位负载Au纳米层在锂空气电池正极中的电催化特性 |
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| 引用本文： | 张蕾,刘清华,段晓波,华小虎,朱丁,陈云贵.原位负载Au纳米层在锂空气电池正极中的电催化特性[J].高等学校化学学报,2016(4):682-687. |
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| 作者姓名： | 张蕾 刘清华 段晓波 华小虎 朱丁 陈云贵 |
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| 作者单位： | 1. 西安科技大学材料科学与工程学院,西安,710054;2. 四川大学材料科学与工程学院,成都,610064 |
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| 基金项目： | 西安科技大学培育基金(批准号:2014004)资助~~ |
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| 摘 要： | 通过自发交换法使Au与非水性锂空气电池中的泡沫镍集流体发生反应,实现了金纳米层催化剂的原位负载.将其作为非水性锂空气电池正极,研究了不同气氛(纯氧、大气和模拟大气)下电池的电化学性能.结果表明,Au纳米层催化剂对氧还原反应/氧逸出反应起到了双功能催化作用,使得氧气电极在不同气氛下的首次放电容量与电压均显著提升,容量分别提升至9169,1604和1853 m A·h/gcarbon;同时氧气电极在模拟大气下的充电过电位降低,能量效率提高,循环性能得到一定提升.
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| 关 键 词： | 锂空气电池 Au双功能催化剂 环境气氛 自发交换法 |
In situ Formed Au Nanolayer as a Bifunctional Catalyst for Li-air Batteries |
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| ZHANG Lei;LIU Qinghua;DUAN Xiaobo;HUA Xiaohu;ZHU Ding;CHEN Yungui.In situ Formed Au Nanolayer as a Bifunctional Catalyst for Li-air Batteries[J].Chemical Research In Chinese Universities,2016(4):682-687. |
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| Authors: | ZHANG Lei;LIU Qinghua;DUAN Xiaobo;HUA Xiaohu;ZHU Ding;CHEN Yungui |
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| Institution: | ZHANG Lei;LIU Qinghua;DUAN Xiaobo;HUA Xiaohu;ZHU Ding;CHEN Yungui;College of Materials Science and Engineering,Xi’an University of Science and Technology;School of Materials Science and Engineering,Sichuan University; |
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| Abstract: | Au nanolayers( ANL) were in situ formed on the Ni foam( SP) via the galvanic exchange method. The as-prepared ANL/SP was applied as the current collector of air cathode for the Li-air battery which operated in pure O2 , ambient air and simulated air. The electrochemical performances of ANL/SP electrode for Li-O2 battery were investigated. The results showed that the in situ incorporation of ANL significantly improves the energy output and the cycling performance of the aprotic Li-O2 battery in ambient or simulated air, and effectively facilitates the oxygen reduction/evolution reactions( ORR/OER) kinetics of the O2 elec-trode in simulated air. |
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| Keywords: | Li-air battery Au bifunctional catalyst Air atmosphere Spontaneous exchange |
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