Multifunctional Interlayer Based on Molybdenum Diphosphide Catalyst and Carbon Nanotube Film for Lithium–Sulfur Batteries,Small

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Multifunctional Interlayer Based on Molybdenum Diphosphide Catalyst and Carbon Nanotube Film for Lithium–Sulfur Batteries
Small ( IF 13.0 ) Pub Date : 2017-12-27 , DOI: 10.1002/smll.201702853
Yufeng Luo _{1,

2,

3} , Nannan Luo ₁ , Weibang Kong _{1,

2} , Hengcai Wu _{1,

2} , Ke Wang _{1,

2} , Shoushan Fan _{1,

2,

3} , Wenhui Duan ₁ , Jiaping Wang _{1,

2}

Affiliation

A multifunctional interlayer, composed of molybdenum diphosphide (MoP₂) nanoparticles and a carbon nanotube (CNT) film, is introduced into a lithium–sulfur (Li–S) battery system to suppress polysulfide migration. Molybdenum diphosphide acts as the catalyst and can capture polysulfides and improve the polysulfide conversion activity during the discharge/charge processes. The CNT film acts as a conductive skeleton to support the MoP₂ nanoparticles and to ensure their uniform distribution. The CNT film physically hinders polysulfide migration, acts as a current collector, and provides abundant electron pathways. The Li–S battery containing the multifunctional MoP₂/CNT interlayer exhibits excellent electrochemical performance. It delivers a reversible specific capacity of 905 mA h g⁻¹ over 100 cycles at 0.2 C, with a capacity decay of 0.152% per cycle. These results suggest the introduction of the multifunctional CNT/MoP₂ interlayer as an effective and practical method for producing high‐performance Li–S batteries.

中文翻译：

基于二硫化钼催化剂和碳纳米管薄膜的锂硫电池多功能中间层

由二硫化钼（MoP ₂）纳米颗粒和碳纳米管（CNT）膜组成的多功能中间层被引入锂硫（Li–S）电池系统中，以抑制多硫化物迁移。二磷化钼充当催化剂，可以在放电/充电过程中捕获多硫化物并改善多硫化物的转化活性。CNT膜充当导电骨架，以支撑MoP ₂纳米颗粒并确保其均匀分布。CNT膜在物理上阻碍了多硫化物的迁移，充当了集电器，并提供了丰富的电子通道。包含多功能MoP ₂的Li–S电池/ CNT中间层具有出色的电化学性能。它在0.2 C的100个循环中提供905 mA hg ^-1的可逆比容量，每个循环的容量衰减为0.152％。这些结果表明，引入多功能CNT / MoP ₂中间层是生产高性能Li-S电池的有效方法。

更新日期：2017-12-27

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