Uniform MnO2 nanostructures supported on hierarchically porous carbon as efficient electrocatalysts for rechargeable Li-O2 batteries

被引:72
作者
Han, Xiaopeng [1 ]
Cheng, Fangyi [1 ]
Chen, Chengcheng [1 ]
Hu, Yuxiang [1 ]
Chen, Jun [1 ]
机构
[1] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn, Coll Chem, Key Lab Adv Energy Mat Chem,Minist Educ, Tianjin 300071, Peoples R China
基金
中国国家自然科学基金;
关键词
lithium-oxygen batteries; manganese oxide; nanocomposite; catalyst; oxygen electrochemistry; MANGANESE OXIDE NANOPARTICLES; PERFORMANCE CATHODE CATALYST; OXYGEN REDUCTION REACTION; HYBRID; DURABILITY; NANOWIRES; ELECTRODE; GRAPHENE; CAMNO3; GROWTH;
D O I
10.1007/s12274-014-0604-y
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Through in situ redox deposition and growth of MnO2 nanostructures on hierarchically porous carbon (HPC), a MnO2/HPC hybrid has been synthesized and employed as cathode catalyst for non-aqueous Li-O-2 batteries. Owing to the mild synthetic conditions, MnO2 was uniformly distributed on the surface of the carbon support, without destroying the hierarchical porous nanostructure. As a result, the as-prepared MnO2/HPC nanocomposite exhibits excellent Li-O-2 battery performance, including low charge overpotential, good rate capacity and long cycle stability up to 300 cycles with controlling capacity of 1,000 mAh center dot g(-1). A combination of the multi-scale porous network of the shell-connected carbon support and the highly dispersed MnO2 nanostructure benefits the transportation of ions, oxygen and electrons and contributes to the excellent electrode performance.
引用
收藏
页码:156 / 164
页数:9
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