Perspective—Reversible Magnesium Storage in Silicon: An Ongoing Challenge
Perspective—Reversible Magnesium Storage in Silicon: An Ongoing Challenge
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DOI：
10.1149/1945-7111/ab736b
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发表时间：
2020-02
影响因子：
3.9
通讯作者：
Dongyang Zhang;Jintao Fu;Zeyu Wang;Lin Wang;John S. Corsi;E. Detsi
中科院分区：
文献类型：
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作者：
Dongyang Zhang;Jintao Fu;Zeyu Wang;Lin Wang;John S. Corsi;E. Detsi
可充电商用锂离子电池的日益普及引发了一个严重的可持续性问题：仅依靠锂离子电池来满足全球便携式/非固定式电化学能量存储需求，将对这些电池中使用的资源造成相当大的压力。因此，替代的可充电电池技术，包括镁离子电池，是可取的。硅具有高天然丰度和3816 mAh g - 1的超高重量容量，可以以硅化镁（mg2si）的形式储存镁，因此在大规模应用中作为镁离子电池的阳极非常有吸引力。尽管有这些独特的优势，但迄今为止，硅中镁的可逆电化学存储尚未得到实验证明，尽管理论研究预测硅与镁的合金化反应在热力学上是可能的。本文旨在阐明硅中镁可逆存储的挑战和现状，并提出克服这一挑战的未来需要。
The increasing popularity of rechargeable commercial lithium-ion batteries raises a serious sustainability concern: Relying solely on lithium-ion batteries for the global portable/non-stationary electrochemical energy storage demands will put considerable strain on the resources used in these batteries. Therefore, alternative rechargeable battery technologies, including magnesium-ion batteries, are desirable. Silicon is very attractive for largescale application as a magnesium-ion battery anode due to its high natural abundance and its ultrahigh gravimetric capacity of 3,816 mAh g − 1 for magnesium storage in the form of magnesium silicide (Mg 2 Si). Despite these unique advantages, to date the reversible electrochemical storage of magnesium in silicon has not yet been demonstrated experimentally, although theoretical studies predict that alloying reactions of silicon with magnesium are thermodynamically possible. The present article is aimed at elucidating the challenge and current status associated with the reversible storage of magnesium in silicon and presenting the future needs to overcome this challenge.