阴极
催化作用
精炼(冶金)
锂(药物)
动力学
化学工程
材料科学
氧气
粒度
晶粒生长
化学
冶金
物理化学
有机化学
医学
物理
量子力学
工程类
内分泌学
作者
Ruonan Yang,Jiajia Li,Dongmei Zhang,Xiuqi Zhang,Xia Li,Yizhuo Han,Zhanhu Guo,Chuanxin Hou,Gang Lian,Feng Dang
标识
DOI:10.1016/j.cclet.2024.109595
摘要
Highly active cathode catalysts for efficient formation/decomposition of Li2O2 are essential for the performance improvement of lithium-oxygen batteries (LOBs). In this study, a grain-refining Co0.85Se catalyst with a lattice spacing of 2.69 Å of (101) plane closely matching with the (100) plane (2.72 Å) of Li2O2 was applied for high-performance LOBs. Highly (101) plane exposed Co0.85Se@CNT was synthesized by a simple one-pot hydrothermal method. The Co0.85Se with the lattice matching effect not only led to the efficient conversion and polarized growth of Li2O2, but also prevented the formation of byproducts. Density functional theory (DFT) calculations reveal that Co0.85Se (101) plane has the intrinsic catalytic ability to generate/decompose Li2O2 during ORR/OER process, due to its homogeneous electron distribution, suitable adsorption energy, and promoted Li2O2 growth kinetics. As a consequence, the (101) plane highly exposed Co0.85Se@CNT-80 electrode exhibited remarkable cycle stability over 2400h at 100 mA/g and 290 cycles at 500 mA/g, which is about 2 times longer than other electrodes.
科研通智能强力驱动
Strongly Powered by AbleSci AI