School of Materials Science and Engineering , Hebei University of Technology , Tianjin 300130 , P. R. China.
ACS Appl Mater Interfaces. 2018 Nov 14;10(45):38978-38984. doi: 10.1021/acsami.8b15139. Epub 2018 Nov 2.
Identifying applicable anode materials is a significant task for Li- and Na-ion battery (LIB and NIB) technologies. We propose the GaN monolayer (2D GaN) can be a good anode candidate. The GaN monolayer manifests stable Li/Na adsorption and inherently low theoretical voltages. Most excitingly, both high storage capacity and extremely fast Li/Na diffusion can be simultaneously realized in the GaN monolayer. For Li, the storage capacity and diffusion barrier is 938 mA h g and 79 meV, respectively. And, the values for Na are 625 mA h g and 22 meV. Compared with known two-dimensional (2D) anode materials with similar scale of ion diffusion barriers, the GaN monolayer almost possesses the highest Li/Na storage capacity discovered to date. Our work suggests that the 2D GaN is a prospective anode material offering fast ion diffusion and high storage capacity.
确定适用的阳极材料是锂离子电池和钠离子电池技术的重要任务。我们提出 GaN 单层（二维 GaN）可以作为一种良好的阳极候选材料。GaN 单层表现出稳定的 Li/Na 吸附和固有低理论电压。最令人兴奋的是，GaN 单层可以同时实现高存储容量和极快的 Li/Na 扩散。对于 Li，存储容量和扩散势垒分别为 938 mA h g 和 79 meV。对于 Na，存储容量和扩散势垒分别为 625 mA h g 和 22 meV。与具有类似离子扩散势垒规模的已知二维（2D）阳极材料相比，GaN 单层几乎拥有迄今为止发现的最高 Li/Na 存储容量。我们的工作表明，二维 GaN 是一种具有快速离子扩散和高存储容量的有前途的阳极材料。
