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首页> 外文期刊>RSC Advances >Free-standing lithiophilic Ag-nanoparticle-decorated 3D porous carbon nanotube films for enhanced lithium storage
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Free-standing lithiophilic Ag-nanoparticle-decorated 3D porous carbon nanotube films for enhanced lithium storage

机译：用于增强锂储存的独立式锂碘术Ag纳米粒子 - 装饰3D多孔碳纳米管膜

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摘要

Lithium metal batteries are promising candidates for next generation high energy batteries. However, an undesirable dendrite growth hinders their practical applications. Herein, a three-dimensional (3D) porous carbon nanotube film decorated with Ag nanoparticles (CNT/Ag) has been synthesized via the thermal decomposition reaction of AgNO _(3) into Ag nanoparticles, and then is transformed into a 3D porous CNT/Ag/Li film via thermal infusion to obtain a high-performance free-standing lithium host. This as-formed 3D CNT/Ag/Li host can effectively restrain the dendrite growth by guiding Li deposition via the highly lithiophilic Ag nanoparticle seeds and lowering local current density of the highly conductive matrix. The as-prepared CNT/Ag/Li electrode exhibits long-term cycling stability over 200 cycles at a current density of 1 mA cm ~(?2) with an areal capacity of 1.0 mA h cm ~(?2) . Moreover, the full cell paired with a sulfur/C cathode shows good cycling stability. Therefore, the 3D porous CNT/Ag/Li film formed via a facile three-step fabrication process can enlarge the cycle lifetime of a lithium metal anode.
机译：锂金属电池是下一代高能源电池的承诺候选人。然而，不希望的树突生长阻碍​​了它们的实际应用。在此，通过Ag Na1-（3）的热分解反应在Ag纳米粒子中合成了用Ag纳米颗粒（CNT / Ag）装饰的三维（3D）多孔碳纳米管膜，然后转化为3D多孔CNT / Ag / Li薄膜通过热输注，获得高性能的独立锂宿主。该作为形成的3D CNT / Ag / Li宿主可以通过通过高锂硫酸氮纳米粒子种子引导Li沉积并降低高导电基质的局部电流密度来有效地抑制树突生长。制备的CNT / Ag / Li电极在电流密度为1mA cm〜（β2）的情况下具有超过200次循环的长期循环稳定性，其容量为1.0mA H cm〜（Δ2）。此外，与硫/ C阴极配对的全细胞显示出良好的循环稳定性。因此，通过容易的三步制造过程形成的3D多孔CNT / Ag / Li膜可以扩大锂金属阳极的循环寿命。

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