Oumellal Yassine, Zlotea Claudia, Bastide Stéphane, Cachet-Vivier Christine, Léonel Eric, Sengmany Stéphane, Leroy Eric, Aymard Luc, Bonnet Jean-Pierre, Latroche Michel
Institut de Chimie et des Matériaux Paris-Est, CNRS UPEC UMR 7182, 2-8 rue Henri Dunant, 94320 Thiais, France.
Nanoscale. 2014 Nov 6;6(23):14459-66. doi: 10.1039/c4nr03444a.
A promising anode material for Li-ion batteries based on MgH₂ with around 5 nm average particles size was synthesized by a bottom-up method. A series of several composites containing MgH₂ nanoparticles well dispersed into a porous carbon host has been prepared with different metal content up to 70 wt%. A narrow particle size distribution (1-10 nm) of the MgH₂ nanospecies with around 5.5 nm average size can be controlled up to 50 wt% Mg. After a ball milling treatment under Ar, the composite containing 50 wt% Mg shows an impressive cycle life stability with a good electrochemical capacity of around 500 mA h g(-1). Moreover, the nanoparticles' size distribution is stable during cycling.
通过自下而上的方法合成了一种有前景的锂离子电池负极材料，其基于平均粒径约为5nm的MgH₂。制备了一系列复合材料，其中MgH₂纳米颗粒均匀分散在多孔碳主体中，金属含量高达70wt%。MgH₂纳米物种的粒径分布较窄（1-10nm），平均粒径约为5.5nm，Mg含量可达50wt%。在Ar气氛下球磨处理后，含50wt%Mg的复合材料显示出令人印象深刻的循环寿命稳定性，电化学容量约为500 mA h g⁻¹。此外，纳米颗粒的粒径分布在循环过程中保持稳定。
