Anode Material for Lithium-Ion Batteries Based on MoS2 and Conductive Polymer Binder: Effects of Electrode Thickness

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

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.
Язык оригиналаанглийский
Номер статьи211023
ЖурналInternational Journal of Electrochemical Science
Том16
DOI
СостояниеОпубликовано - сен 2021

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