Surface Redox-Active Organosulfur-Tethered Carbon Nanotubes for High Power and Long Cyclability of Na–Organosulfur Hybrid Energy Storage,ACS Energy Letters

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Surface Redox-Active Organosulfur-Tethered Carbon Nanotubes for High Power and Long Cyclability of Na–Organosulfur Hybrid Energy Storage
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-12-28 , DOI: 10.1021/acsenergylett.0c02188
Milan Jana ₁ , Jae Min Park ₁ , Manikantan Kota ₁ , Kang Ho Shin ₁ , Harpalsinh H. Rana ₁ , Puritut Nakhanivej ₁ , Jia-Qi Huang ₂ , Ho Seok Park _{1,

3,

4}

Affiliation

Despite the clear benefits of Na and S active materials, Na–S hybrid energy storage devices have yet to be exploited, and existing Na–S batteries cannot provide fast kinetics and long-term stability. Herein, we describe chemical and electronic coupling of the redox-active organosulfur moiety (−S–S–S−) with carbon nanotube (CNT) networks for high power and long cyclability of Na–organosulfur hybrid energy storage devices. The facile and reversible surface redox kinetics of organosulfur-tethered CNT is associated with a two-electron transfer toward the formation of low-order polysulfide, as confirmed by in situ and ex situ analyses. The specific capacitance of SOS-OCNT is 377 F g^–1 (94% of theoretical capacitance) and 61.3% of capacitance is retained at 10 A g^–1. The Na–organosulfur hybrid full cells deliver an ultrahigh power density of 13.4 kW kg^–1 and high energy density of 27 Wh kg^–1 over 50000 cycles.

中文翻译：

表面氧化还原活性有机硫束缚碳纳米管，用于高功率和长循环性的Na-有机硫杂化储能

尽管Na和S活性材料具有明显的好处，但Na-S混合储能装置尚未得到开发，并且现有的Na-S电池无法提供快速的动力学和长期稳定性。在这里，我们描述了氧化还原活性有机硫部分（-SS–SS–）与碳纳米管（CNT）网络的化学和电子偶联，以实现高功率和长循环性的Na-有机硫杂化储能装置。如原位和异位分析所证实的那样，有机硫束缚的CNT的容易和可逆的表面氧化还原动力学与向低级多硫化物形成的两电子转移有关。SOS-OCNT的比电容为377 F g ^–1（理论电容的94％），在10 A g时保持61.3％的电容^–1。Na-有机硫杂化全电池在5万次循环中可提供13.4 kW kg ^–1的超高功率密度和27 Wh kg ^–1的高能量密度。

更新日期：2021-01-08

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