Dual Functional Ni3S2@Ni Core–Shell Nanoparticles Decorating Nanoporous Carbon as Cathode Scaffolds for Lithium–Sulfur Battery with Lean Electrolytes,ACS Applied Energy Materials

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Dual Functional Ni3S2@Ni Core–Shell Nanoparticles Decorating Nanoporous Carbon as Cathode Scaffolds for Lithium–Sulfur Battery with Lean Electrolytes
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-05-05 , DOI: 10.1021/acsaem.0c00568
Yulun Zhang ₁ , Yuxiao Lin ₁ , Lingfeng He ₁ , Vijayakumar Murugesan ₂ , Gorakh Pawar ₁ , Bhuvana M. Sivakumar ₂ , Hanping Ding ₁ , Dong Ding ₁ , Boryann Liaw ₁ , Eric J. Dufek ₁ , Bin Li ₁

Affiliation

Lithium–sulfur batteries are very promising for next-generation energy storage. However, most studies use flooded electrolytes to achieve a high specific capacity at the expense of lowering the specific energy. Understanding lithium–sulfur battery performance with lean electrolytes is highly desirable. Herein, a modified Pechini method is developed to synthesize a nanoporous carbon host decorated with Ni₃S₂@Ni particles. Such a cathode delivers enhanced specific capacities with extended cycling life in lean electrolytes, due to the dual functions of the Ni₃S₂ shell, which can both facilitate reaction kinetics and promote electrolyte wetting. This work highlights a strategy to rationally design cathodes for high-energy lithium–sulfur batteries.

中文翻译：

双功能Ni ₃ S ₂ @Ni核-壳纳米粒子修饰纳米多孔碳作为具有稀薄电解质的锂硫电池的阴极支架

锂硫电池对于下一代储能非常有前途。然而，大多数研究使用溢流电解质来实现高比容量，但以降低比能为代价。非常需要了解使用稀薄电解质的锂硫电池的性能。在本文中，开发了一种改进的Pechini方法以合成装饰有Ni ₃ S ₂ @Ni颗粒的纳米多孔碳基质。由于Ni ₃ S ₂的双重功能，这种阴极在稀薄电解质中具有增强的比容量和更长的循环寿命。壳，既可以促进反应动力学，又可以促进电解质润湿。这项工作强调了合理设计高能锂硫电池正极的策略。

更新日期：2020-05-05

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