Mn2C monolayer: A superior anode material offering good conductivity, high storage capacity and ultrafast ion diffusion for Li-ion and Na-ion batteries

被引：62

作者：

Zhang, Xiaoming ^{[1
,2
]}

Meng, Weizhen ^{[1
,2
]}

He, Tingli ^{[1
,2
]}

Jin, Lei ^{[1
,2
]}

Dai, Xuefang ^{[1
,2
]}

Liu, Guodong ^{[1
,2
]}

机构：

[1] Hebei Univ Technol, State Key Lab Reliabil & Intelligence Elect Equip, Tianjin 300130, Peoples R China

[2] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 503卷

关键词：

Li-ion/Na-ion batteries; Anode materials; Mn2C monolayer; GENERALIZED GRADIENT APPROXIMATION; LITHIUM-ION; ELECTRODE MATERIAL; ENERGY-STORAGE; SODIUM; METAL; TEMPERATURE; PERFORMANCE; CAPABILITY; GRAPHENE;

D O I：

10.1016/j.apsusc.2019.144091

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：

Developing superior anode materials with offering good conductivity, excellent ion diffusion ability, and high storage capacity is highly desired in current Li-/Na-ion battery (LIB/NIB) technologies. Here, we demonstrate Mn2C monolayer can serve as a such anode material with providing excellent performances on all the crucial judgments. Mn2C monolayer offers stable Li/Na adsorption and relatively low open-circuit voltages, which are desired for anode materials. Mn2C monolayer hosts excellent conductivity during Li/Na adsorption process. Mn2C monolayer shows very high specific capacities for Li (887.6 mA h g(-1)) and Na (443.6 mA h g(-1)). Remarkably, Mn2C monolayer nearly has the lowest Li/Na diffusion barrier among known 2D anode materials, which offers ultrafast ion diffusion. These results suggest Mn2C monolayer is one of the few superior LIB/NIB anode materials indentified so far.

引用

页数：7

共 76 条

[1] BAND THEORY AND MOTT INSULATORS - HUBBARD-U INSTEAD OF STONER-I [J].