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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Bowl-like C@MoS2 Nanocomposites as Anode Materials for Lithium-Ion Batteries: Enhanced Stress Buffering and Charge/Mass Transfer
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Bowl-like C@MoS2 Nanocomposites as Anode Materials for Lithium-Ion Batteries: Enhanced Stress Buffering and Charge/Mass Transfer

机译:碗状C @ MOS2纳米复合材料作为锂离子电池的阳极材料:增强应力缓冲和充电/传质

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摘要

Fabrication of stress-buffered nanostructured electrodes with good mechanical stability and electrical conductivity remains a daunting challenge. Herein, we describe the design and preparation of bowl-like hybrids whereby ultrathin MoS2 nano-sheets are anchored on the surfaces of mesoporous hollow carbon bowls (MHCBs). The porous bowl-like structure not only buffers mechanical stress arising from volumetric variation during the charge/discharge process but also increases the packing density of electrode materials by stacking up the carbon bowls. The resulting bowl-like C@MoS2 hybrid structure exhibits a reversible capacity of 798 mA h g(-1) at 0.1 A g(-1) and outstanding long-term stability at 526 mA h g(-1) after 1000 cycles at 1 A g(-1). Kinetics investigation demonstrates that the Li+ storage is governed by the pseudocapacitive mechanism due to the porous, conductive network of MHCBs.
机译:具有良好机械稳定性和电导率的应力缓冲纳米结构电极的制造仍然是令人生畏的攻击。 在此,我们描述了碗状杂种的设计和制备,由此超薄MOS2纳米片锚定在介孔中空碳碗(MHCB)的表面上。 多孔碗状结构不仅缓冲来自电荷/放电过程中的体积变化而产生的机械应力,而且通过堆叠碳碗来增加电极材料的填充密度。 由此得到的碗状C杂交结构在0.1Ag(-1)的可逆容量为798mA Hg(-1),在1A的1000次循环后,在526 mA Hg(-1)下出色的长期稳定性 g(-1)。 动力学调查表明,由于MHCB的多孔导电网络,Li +储存受伪电容机制的管辖。

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