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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >3D Gold Nanocrystal Arrays: A Framework for Reversible Lithium Storage
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3D Gold Nanocrystal Arrays: A Framework for Reversible Lithium Storage

机译：3D金纳米晶体阵列：可逆锂存储的框架

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摘要

Nanosized metal particles are currently used in the development of high-capacity metal-based negative electrodes for Li-ion batteries. Here, we report on a new strategy that uses 6-mercaptopurine-monolayer protected gold clusters (6MP-MPCs) as an electrode for a lithium battery. The higher performance of the Li/6MP-MPC as compared to the Li/2D-Au cell (the latter consists of naked gold microparticles composed of nanocrystallites of around 17 nm in size) is explained on the basis of the three-dimensional organization of the 6MP-MPCs in the powder sample. The cell specific capacity of the Li/6MP-MPC is kept on extended cycling in contrast to the behavior observed for the Li/2D-Au cell that shows an abrupt decay of this magnitude after a few cycles. The reorganization of the 6MP molecular layer on the lithium-gold alloying process allows the accommodation of the increased cores in the same space volume, avoiding the cracks in the electrode, thus, keeping the electronic conduction.
机译：纳米尺寸的金属颗粒目前被用于开发用于锂离子电池的高容量金属基负极。在这里，我们报告了一种使用6-巯基嘌呤单层保护的金簇（6MP-MPC）作为锂电池电极的新策略。与Li / 2D-Au电池（后者由裸露的金微粒组成，该裸金微粒由大小约为17 nm的纳米微晶组成）相比，Li / 6MP-MPC的性能更高，是根据Li / 2MP-MPC的三维组织来解释粉末样品中的6MP-MPC。 Li / 6MP-MPC的电池比容量保持延长的循环，这与Li / 2D-Au电池观察到的行为相反，后者在几个循环后显示出这种幅度的突然衰减。锂金合金化过程中6MP分子层的重组允许将增加的核容纳在相同的空间体积中，避免了电极中的裂纹，从而保持了电子传导。

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