Improving the performance of a non-aqueous lithium-air battery by defective titanium dioxides with oxygen vacancies

Improving the performance of a non-aqueous lithium-air battery by defective titanium dioxides with oxygen vacancies
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通过氧空位缺陷二氧化钛改善非水锂空气电池的性能

DOI:
10.1016/j.electacta.2016.04.007
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发表时间:
2016-06
影响因子:
6.6
通讯作者:
Zhongkuan Luo
Zhongkuan Luo
中科院分区:
材料科学2区
文献类型:
--
作者:
Yang Huang;Chunli Yin;Yanghai Xu;Zhongkuan Luo

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在这项工作中,我们提出了使用二氧化钛(二氧化钛)与氧空位(H-TiO 2)作为阴极催化剂,以改善非水锂空气电池的电化学性能。通过对金红石型TiO 2进行简单的热处理得到了H-TiO 2催化剂,并通过拉曼光谱和X射线光电子能谱(XPS)证实了空位的存在。结果表明,由于存在可促进氧的吸附和解离的缺陷,具有H-TiO 2的内部锂空气电池可以在0.3和0.5 mA cm− 2的电流密度下放电,同时分别保持3.2和2.8 mAh cm−2的比容量,远高于不含催化剂或具有原始金红石TiO 2的电池。此外,循环测试表明,在0.3和0.5 mA cm− 2的电流密度下,具有0.1 mAh cm− 2的固定比容量和2.0 V的截止放电电压,具有H-TiO 2的电池可以分别经历400和372次循环。
In this work, we proposed using titanium dioxides (TiO2) with oxygen vacancies (H-TiO2) as cathode catalysts to improve the electrochemical performance of non-aqueous lithium-air batteries. Such H-TiO2catalysts were attained by a facile heat treatment of rutile TiO2and the existence of vacancies was confirmed by Raman spectra and X-ray photoelectron spectroscopy (XPS). It was demonstrated that due to the presence of defects which can facilitate the adsorption and dissociation of oxygen, the in-house lithium-air battery with H-TiO2can be discharged at the current densities of 0.3 and 0.5 mA cm−2while maintaining the specific capacities of 3.2 and 2.8 mAh cm−2, respectively, much higher than those of the batteries without catalysts or with pristine rutile TiO2. In addition, the cycling test showed that the battery with H-TiO2can undergo 400 and 372 cycles, respectively, at the current densities of 0.3 and 0.5 mA cm−2with a fixed specific capacity of 0.1 mAh cm−2and a cutoff discharge voltage of 2.0 V.
氧化钌改性二氧化钛纳米管阵列作为无碳和无粘合剂锂空气电池阴极催化剂
DOI: 10.1016/j.jpowsour.2014.07.112
发表时间: 2014-12
影响因子: 9.2
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基于不含碳或粘合剂的 TiO2 负载正极的增强 Li-O2 电池的循环性能
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DOI: 10.1016/j.chemphys.2014.07.011
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发表时间: 2011-01
影响因子: 3.7
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DOI: 10.1002/cssc.201500873
发表时间: 2015-11-09
期刊: CHEMSUSCHEM
影响因子: 8.4
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