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首页> 外文期刊>International Journal of Electrochemical Science >Anode Material for Lithium-Ion Batteries Based on MoS2?and Conductive Polymer Binder: Effects of Electrode Thickness
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Anode Material for Lithium-Ion Batteries Based on MoS2?and Conductive Polymer Binder: Effects of Electrode Thickness

机译：基于MOS2的锂离子电池阳极材料α和导电聚合物粘合剂：电极厚度的影响

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摘要

High specific capacity of anode materials based on MoS2 is attractive for their use in lithium-ion batteries. However, low cycling stability of bulk MoS2 and complicated conversion mechanism of charge storage are major challenges for adoption of such materials as anodes for lithium-ion batteries. In this work, we focus on the effects of electrode thickness on electrochemical performance of anodes based on MoS2. We assess whether variation of thickness is a viable strategy to enhance the stability of such materials. Among electrodes with thickness varied within 70-250 μm, those with 100 μm to 150 μm material thickness display the most favorable rate capability in galvanostatic charge-discharge tests (32% of initial capacity at 2 A g-1 ), which is linked to their low charge transfer resistance, as shown by electrochemical impedance spectroscopy. We also show that conductive polymer binder based on PEDOT:PSS and CMC facilitates charge transfer, as compared to conventional PVDF binder. Electrochemical studies and investigations with SEM, HR-XRD, and XPS methods show that irreversible processes occur in the electrodes and point at the necessity of substantial MoS2 materials modification to preserve their stability.
机译：基于MOS2的阳极材料的高比容量对于它们在锂离子电池中使用具有吸引力。然而，散装MOS2的低循环稳定性和电荷存储的复杂转换机构是用于采用这种材料作为锂离子电池的阳极的主要挑战。在这项工作中，我们专注于电极厚度对基于MOS2的阳极电化学性能的影响。我们评估厚度的变异是可行的策略，以提高这些材料的稳定性。在70-250μm内的厚度变化的电极中，具有100μm至150μm的材料厚度在镀锌电荷 - 放电测试中显示最有利的速率能力（2 a g-1的初始容量的32％），其与之相关联它们的低电荷传递电阻，如电化学阻抗光谱所示。我们还表明，与常规PVDF粘合剂相比，基于PEDOT：PSS和CMC的导电聚合物粘合剂有助于电荷转移。使用SEM，HR-XRD和XPS方法的电化学研究和调查表明，在电极中发生不可逆的过程，并且在实质性MOS2材料改性以保持其稳定性的情况下发生不可逆的过程。

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