MnCo2O4/MoO2 Nanosheets Grown on Ni foam as Carbon- and Binder-Free Cathode for Lithium-Oxygen Batteries

被引:32
作者
Cao, Xuecheng [1 ,2 ]
Sun, Zhihui [1 ,2 ]
Zheng, Xiangjun [1 ,2 ]
Jin, Chao [1 ,2 ]
Tian, Jinhua [1 ,2 ]
Li, Xiaowei [1 ,2 ]
Yang, Ruizhi [1 ,2 ]
机构
[1] Soochow Univ, Coll Phys Optoelect & Energy, Soochow Inst Energy & Mat Innovat,Key Lab Adv Car, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou, Jiangsu 215006, Peoples R China
[2] Inst Chem Power Sources, Suzhou 215006, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
high efficiency; lithium-oxygen batteries; long life; molybdenum dioxide; spinel oxide; LI-O-2; BATTERIES; EFFICIENT ELECTROCATALYST; EVOLUTION; GRAPHENE; PERFORMANCE; CATALYST; LI2O2; NUCLEATION; REDUCTION; MECHANISM;
D O I
10.1002/cssc.201702240
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Carbon is usually used as cathode material for Li-O-2 batteries. However, the discharge product, such as Li2O2 and LiO2, could react with carbon to form an insulating lithium carbonate layer, resulting in cathode passivation and capacity fading. To solve this problem, the development of non-carbon cathodes is highly desirable. Herein, we successfully synthesized MnCo2O4 (MCO) nanoparticles anchored on porous MoO2 nanosheets that are grown on Ni foam (current collector) (MCO/MoO2@Ni), acting as a carbon- and binder-free cathode for Li-O-2 batteries, in an attempt to improve the electrical conductivity, electrocatalytic activity, and durability. This MCO/MoO2@Ni electrode delivers excellent cyclability (more than 400cycles) and rate performance (voltage gap of 0.75V at 5000 mA g(-1)). Notably, the battery with this electrode exhibits a high energy efficiency (higher than 85%). The advanced electrochemical performance of MCO/MoO2@Ni can be attributed to its high electrical conductivity, excellent stability, and outstanding electrocatalytic activity. This work offers a new strategy to fabricate high-performance Li-O-2 batteries with non-carbon cathode materials.
引用
收藏
页码:574 / 579
页数:6
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