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Achieving highly stable Li-O2battery operation by designing a carbon nitride-based cathode towards a stable reaction interface
Lou, Peili1,2; Cui, Zhonghui1; Guo, Xiangxin1
2017
发表期刊Journal of Materials Chemistry A
ISSN20507488
卷号5期号:34页码:18207-18213
摘要Aprotic Li-O2batteries have attracted a great deal of attention because of their potential to offer much higher energy density than those provided by commercialized lithium-ion batteries. However, their reversible operation is plagued by serious side-reactions from liquid electrolytes and/or carbon-based materials. Recently, carbon-free materials have been proposed and utilized to construct stable cathodes for Li/O2chemistry. Different from most of the previously reported metal-based carbon-free cathodes, herein we report a non-metal-based carbon-free cathode support consisting of mesoporous boron-doped carbon nitride (m-BCN) and demonstrate its excellent stability and activity for Li/O2chemistry. Benefiting from the introduction of evenly distributed RuO2nanoparticles (1-2 nm) in the pores of the boron-doped carbon nitride support, excellent cycle stability with a low overpotential (141 cycles with a pristine Li anode which is extended to 227 cycles after replacing it with a new Li anode at 0.5 mA cm-2) and superior rate capability (1.28 mA h cm-2at 1 mA cm-2) are obtained. This impressive performance is ascribed to the enhanced stability and activity of such designed cathodes, which is supported by the fact that reversible formation and decomposition of Li2O2with no accumulation of Li2CO3is detected during cycling. These results demonstrate that manipulating cathode materials towards stable reaction interfaces is essential for alleviating the formation of by-products and improving the performance of Li-O2batteries. © 2017 The Royal Society of Chemistry.
DOI10.1039/c7ta05009g
EI入藏号20173604126398
EI主题词Lithium-air batteries
EI分类号542.4 Lithium and Alloys - 714.1 Electron Tubes - 804.2 Inorganic Compounds - 951 Materials Science
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25436
专题中国科学院上海硅酸盐研究所
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100039, China
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Lou, Peili,Cui, Zhonghui,Guo, Xiangxin. Achieving highly stable Li-O2battery operation by designing a carbon nitride-based cathode towards a stable reaction interface[J]. Journal of Materials Chemistry A,2017,5(34):18207-18213.
APA Lou, Peili,Cui, Zhonghui,&Guo, Xiangxin.(2017).Achieving highly stable Li-O2battery operation by designing a carbon nitride-based cathode towards a stable reaction interface.Journal of Materials Chemistry A,5(34),18207-18213.
MLA Lou, Peili,et al."Achieving highly stable Li-O2battery operation by designing a carbon nitride-based cathode towards a stable reaction interface".Journal of Materials Chemistry A 5.34(2017):18207-18213.
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