RemarkableimprovementofcyclicstabilityinLi-O2batteriesusingruthenoceneasaredoxmediator

被引：0

作者：

Cuicui Zhu ^{[1
,2
]}

Yiping Wang ^{[3
]}

Ling Shuai ^{[3
]}

Yizhao Tang ^{[1
,2
]}

Ming Qiu ^{[3
]}

Jian Xie ^{[4
]}

Jia Liu ^{[5
]}

Wen Wen ^{[6
]}

Hengquan Chen ^{[1
,2
]}

Suifei Nan ^{[1
,2
]}

Mei Dou ^{[1
,2
]}

Qinggang He ^{[1
,2
,7
]}

机构：

[1] College of Chemical and Biological Engineering,Zhejiang University

[2] Institute of Zhejiang University-Quzhou

[3] Institute of Nanoscience and Nanotechnology,College of Physical Science and Technology,Central China Normal University

[4] School of Materials Science and Engineering,Zhejiang University

[5] Nation & Local United Engineering Laboratory for Power Batteries,Faculty of Chemistry,Northeast Normal University

[6] Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences

[7] Ningbo Research Institute,Zhejiang University

来源：

Chinese Chemical Letters | 2020年 / 31卷 / 07期

关键词：

D O I：

暂无

中图分类号：

TM911.41 [金属-空气电池]; O643.36 [催化剂];

学科分类号：

0808 ; 081705 ;

摘要：

Nonaqueous Li-O2 batteries attract attention for their theoretical specific energy density.However,due to the difficulty of decomposition of Li2 O2,Li-O2 batteries have high charge overpotential and poor cycling life.So all kinds of catalysts have been studied on the cathode.Compared to heterogeneous solid catalysts,soluble catalysts achieve faster and more effective transport of electrons by reversible redox pairs.Here,we first report ruthenocene（Ruc） as a mobile redox mediator in a Li-O2 battery.0.01 mol/L Ruc in the electrolyte effectively reduces the charging voltage by 610 mV.Additionally,Ruc greatly increases the cycling life by four-fold（up to 83 cycles） with a simple ketjen black（KB） cathode.The results of SEM,XPS and XRD confirm that less discharge product residue accumulated after recharge.To verify the reaction mechanisms of the mediato r,free energy profiles of the possible reaction pathways based on DFT are provided.

引用

页码：1997 / 2002

页数：6

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