过电位
纳米团簇
电解质
电催化剂
催化作用
分解
化学工程
锂(药物)
电化学
材料科学
纳米技术
析氧
化学
无机化学
电极
物理化学
有机化学
内分泌学
工程类
医学
作者
Lina Song,Lianchun Zou,Xiaoxue Wang,Nan Luo,Ji‐Jing Xu,Jihong Yu
出处
期刊:iScience
[Elsevier]
日期:2019-03-15
卷期号:14: 36-46
被引量:28
标识
DOI:10.1016/j.isci.2019.03.013
摘要
The rapid and effective formation and decomposition of Li2O2 during cycling is crucial to solve the problems associated with the practical limitation of lithium-oxygen (Li-O2) batteries. In this work, a highly dispersed electrocatalyst with Ru nanoclusters inside the special organic molecular cage ([email protected]) through a reverse double-solvent method for Li-O2 batteries has been proposed for the first time. This [email protected] shows an effective catalyst enabling reversible formation and decomposition of the Li2O2 at the interface between the Li2O2 and the liquid electrolyte, rather than the sluggish solid-solid interface reactions on commonly used solid catalysts. As a result, the Li-O2 cells with [email protected] show enhanced electrochemical performance, including low overpotential (310 mV at a current density of 100 mA g−1), high specific capacity (15,068 mAh g−1), good rate capability (1,800 mAh g−1 at a current density of 2.8 A g−1), and especially superior cycle stability up to 470 cycles.
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