Cobalt nanoparticles embedded into free-standing carbon nanofibers as catalyst for room-temperature sodium-sulfur batteries.,Journal of Colloid and Interface Science

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Cobalt nanoparticles embedded into free-standing carbon nanofibers as catalyst for room-temperature sodium-sulfur batteries.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.jcis.2020.01.010
Wenyan Du ₁ , Wei Gao ₁ , Tingting Yang ₁ , Bingshu Guo ₁ , Longzhen Zhang ₁ , Shu-Juan Bao ₁ , Yuming Chen ₂ , Maowen Xu ₁

Affiliation

Room-temperature sodium-sulfur (RT Na-S) batteries are seriously limited because of poor conductivity of sulfur and sluggish reaction kinetics of polysulfide intermediates. Here, we design a free-standing film, constructed from Co nanoparticles onto nitrogen-doped porous carbon nanofibers (Co@NPCNFs), to load sulfur for RT Na-S batteries. Experiment result shows that Co as catalyst can enable the rapid sodium intercalation and fast reduction reaction of the polysulfides during cycling. Hence, the prepared Co@NPCNFs/S cathode exhibits a remarkable capacity of 906 mAh g-1 at 0.1 C and long cycling life up to 800 cycles with a slow capacity decay of 0.038% per cycle at 1 C.

中文翻译：

嵌入纳米碳钴纤维中的钴纳米颗粒作为室温钠硫电池的催化剂。

室温钠硫（RT Na-S）电池受到严重限制，原因是硫的导电性差以及多硫化物中间体的反应动力学缓慢。在这里，我们设计了一个独立的薄膜，该薄膜由Co纳米颗粒构造到氮掺杂的多孔碳纳米纤维（Co @ NPCNFs）上，以为RT Na-S电池装载硫。实验结果表明，钴作为催化剂能够使多硫化物在循环过程中快速嵌入钠和快速还原反应。因此，制备的Co @ NPCNFs / S阴极在0.1 C时表现出906 mAh g-1的显着容量，在800次循环中具有较长的循环寿命，在1 C时每个循环的缓慢容量衰减为0.038％。

更新日期：2020-01-07

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