Plasma-processed homogeneous magnesium hydride/carbon nanocomposites for highly stable lithium storage

Release time:2020-05-23

Impact Factor:8.67

DOI number:10.1007/s12274-017-1902-y

Affiliation of Author(s):Peking Univ

Journal:Nano Res.

Abstract:Magnesium hydride (MgH2) is a high-capacity anode material for lithium ion batteries, which suffers from poor cycling stability. In this study, we describe a thermal plasma-based approach to prepare homogeneous MgH2/C nanocomposites with very high cycling stability. In this process, magnesium evaporation is coupled with carbon generation from the plasma decomposition of acetylene, leading to a homogeneous Mg/C nanocomposite, which can be easily converted to MgH2/C by hydrogenation. The MgH2/C nanocomposite achieves a high reversible capacity of up to 620 mAh.g(-1) after 1,000 cycles with an ultralow decay rate of only 0.0036% per cycle, which represents a significantly improved performance compared to previous results.

Co-author:Jun, Chen, Yanru, Guo, Xinyao, Zheng

First Author:Xinghua, Chang

Indexed by:Journal paper

Correspondence Author:Xingguo, Li, Jie, Zheng

First-Level Discipline:0805 材料科学与工程

Document Type:J

Translation or Not:no

Date of Publication:2018-05-01