Ultrafine Ru/RuOx Nanoparticles Uniformly Anchored on Carbon Nanotubes as Cathode Electrocatalyst for Lithium-Oxygen Batteries

被引：11
作者：
Zhang, Yaowen [1 ]
Wang, Xiaogang [2 ]
Yin, Jianjun [1 ]
Wang, Yifeng [2 ,3 ,4 ]
Li, Chao [2 ]
Xia, Dingguo [2 ,3 ]
机构：
[1] Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China
[2] Chinese Acad Sci, Qingdao Ind Energy Storage Res Inst, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Shandong, Peoples R China
[3] Peking Univ, Coll Engn, Beijing Key Lab Theory & Technol Adv Batteries Ma, Beijing 100871, Peoples R China
[4] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
来源：
CHEMISTRYSELECT | 2019年 / 4卷 / 15期
基金：
中国国家自然科学基金;
关键词：
carbon nanotubes; ethylene glycol reduction; lithium-oxygen batteries; ruthenium; RUTHENIUM NANOPARTICLES; LI-O-2; BATTERIES; RATE CAPABILITY; CATALYST; REDUCTION; SIZE; OXIDATION; PLATINUM; CAPACITY; SUPPORT;
D O I：
10.1002/slct.201900023
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The nonaqueous lithium-oxygen (Li-O-2) battery possesses extremely high theoretical energy density which is considered as one of the most fascinating next-generation energy storage systems. However, the sluggish oxygen redox reaction kinetics in the cathode of Li-O-2 battery severely limits its practical application. The incorporation of cathode electrocatalyst with high activity is an effective strategy to address this issue. Herein we report a novel electrocatalyst of ultrafine Ru/RuOx nanoparticles (NPs) decorated on the surface of carbon nanotubes (Ru/RuOx@CNTs) synthesized by a facile modified ethylene glycol reduction method. The as-prepared Ru/RuOx@CNTs electrocatalyst as cathode for Li-O-2 battery delivers high initial discharge specific capacity up to 3795 mAh g(-1), low overpotential and preferable cycle stability of 113 cycles with a limited specific capacity of 500 mAh g(-1) at 0.1 mA cm(-2) compared with CNTs cathode, which is originated from the well-dispersed Ru/RuOx nanoparticles on CNTs, leading to efficient electrocatalytic activities for oxygen reduction and evolution reactions.
引用
收藏
页码：4593 / 4597
页数：5
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