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Conversion of LiPSs Accelerated by Pt-Doped Biomass-Derived Hyphae Carbon Nanobelts as Self-Supporting Hosts for Long-Lifespan Li–S Batteries
Energy & Environmental Materials ( IF 13.0 ) Pub Date : 2023-03-30 , DOI: 10.1002/eem2.12623 Fengfeng Han 1 , Liwen Fan 2 , Xinzhi Ma 1 , Huiqing Lu 1 , Lu Li 1 , Xitian Zhang 1 , Lili Wu 1
Energy & Environmental Materials ( IF 13.0 ) Pub Date : 2023-03-30 , DOI: 10.1002/eem2.12623 Fengfeng Han 1 , Liwen Fan 2 , Xinzhi Ma 1 , Huiqing Lu 1 , Lu Li 1 , Xitian Zhang 1 , Lili Wu 1
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Rechargeable Li–S batteries (LSBs) are emerging as an important alternative to lithium-ion batteries (LIBs), owing to their high energy densities and low cost; yet sluggish redox kinetics of LiPSs results in inferior cycle life. Herein, we prepared multifunctional self-supporting hyphae carbon nanobelt (HCNB) as hosts by carbonization of hyphae balls of Rhizopus, which could increase the S loading of the cathode without sacrificing reaction kinetics. Trace platinum (Pt) nanoparticles were introduced into HCNBs (PtHCNBs) by ion-beam sputtering deposition. Based on the X-ray photoelectron spectroscopy analyses, the introduced trace Pt regulated the local electronic states of heteroatoms in HCNBs. Electrochemical kinetics investigation combined with operando Raman measurements revealed the accelerated reaction mechanics of sulfur species. Benefiting from the synergistic catalytic effect and the unique structures, the as-prepared PtHCNB/MWNCT/S cathodes delivered a stable capacity retention of 77% for 400 cycles at 0.5 C with a sulfur loading of 4.6 mg cm−2. More importantly, remarkable cycling performance was achieved with an high areal S loading of 7.6 mg cm−2. This finding offers a new strategy to prolong the cycle life of LSBs.
中文翻译：
掺杂 Pt 的生物质衍生菌丝碳纳米带作为长寿命锂硫电池的自支撑宿主加速 LiPS 的转化
可充电锂硫电池（LSB）由于其高能量密度和低成本而成为锂离子电池（LIB）的重要替代品；然而，LiPS 缓慢的氧化还原动力学导致循环寿命较差。在此，我们通过根霉菌丝球的碳化制备了多功能自支撑菌丝碳纳米带（HCNB）作为主体，这可以在不牺牲反应动力学的情况下增加阴极的硫负载。通过离子束溅射沉积将痕量铂 (Pt) 纳米粒子引入 HCNB (PtHCNB)。基于X射线光电子能谱分析，引入的痕量Pt调节了HCNB中杂原子的局域电子态。电化学动力学研究与操作拉曼测量相结合揭示了硫物质的加速反应机制。得益于协同催化效应和独特的结构，所制备的PtHCNB/MWNCT/S正极在0.5 C下循环400次后，硫负载量为4.6 mg cm -2 ，容量保持率稳定为77% 。更重要的是，通过7.6 mg cm -2的高面积S负载实现了卓越的循环性能。这一发现为延长 LSB 的循环寿命提供了一种新策略。
更新日期：2023-03-30
中文翻译：
掺杂 Pt 的生物质衍生菌丝碳纳米带作为长寿命锂硫电池的自支撑宿主加速 LiPS 的转化
可充电锂硫电池（LSB）由于其高能量密度和低成本而成为锂离子电池（LIB）的重要替代品；然而，LiPS 缓慢的氧化还原动力学导致循环寿命较差。在此，我们通过根霉菌丝球的碳化制备了多功能自支撑菌丝碳纳米带（HCNB）作为主体，这可以在不牺牲反应动力学的情况下增加阴极的硫负载。通过离子束溅射沉积将痕量铂 (Pt) 纳米粒子引入 HCNB (PtHCNB)。基于X射线光电子能谱分析，引入的痕量Pt调节了HCNB中杂原子的局域电子态。电化学动力学研究与操作拉曼测量相结合揭示了硫物质的加速反应机制。得益于协同催化效应和独特的结构，所制备的PtHCNB/MWNCT/S正极在0.5 C下循环400次后，硫负载量为4.6 mg cm -2 ，容量保持率稳定为77% 。更重要的是，通过7.6 mg cm -2的高面积S负载实现了卓越的循环性能。这一发现为延长 LSB 的循环寿命提供了一种新策略。
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