TY - JOUR

T1 - Anode Material for Lithium-Ion Batteries Based on MoS2 and Conductive Polymer Binder: Effects of Electrode Thickness

AU - Volkov, A. I.

AU - Tolstopjatova, E. G.

AU - Kondratiev, V. V.

N1 - Publisher Copyright: © 2021 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/)

PY - 2021/10/1

Y1 - 2021/10/1

N2 - High specific capacity of anode materials based on MoS2 is attractive for their use in lithium-ionbatteries. However, low cycling stability of bulk MoS2 and complicated conversion mechanism of chargestorage are major challenges for adoption of such materials as anodes for lithium-ion batteries. In thiswork, we focus on the effects of electrode thickness on electrochemical performance of anodes based onMoS2. We assess whether variation of thickness is a viable strategy to enhance the stability of suchmaterials. Among electrodes with thickness varied within 70-250 μm, those with 100 μm to 150 μmmaterial 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 byelectrochemical impedance spectroscopy. We also show that conductive polymer binder based onPEDOT:PSS and CMC facilitates charge transfer, as compared to conventional PVDF binder.Electrochemical studies and investigations with SEM, HR-XRD, and XPS methods show thatirreversible processes occur in the electrodes and point at the necessity of substantial MoS2 materialsmodification to preserve their stability.

AB - High specific capacity of anode materials based on MoS2 is attractive for their use in lithium-ionbatteries. However, low cycling stability of bulk MoS2 and complicated conversion mechanism of chargestorage are major challenges for adoption of such materials as anodes for lithium-ion batteries. In thiswork, we focus on the effects of electrode thickness on electrochemical performance of anodes based onMoS2. We assess whether variation of thickness is a viable strategy to enhance the stability of suchmaterials. Among electrodes with thickness varied within 70-250 μm, those with 100 μm to 150 μmmaterial 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 byelectrochemical impedance spectroscopy. We also show that conductive polymer binder based onPEDOT:PSS and CMC facilitates charge transfer, as compared to conventional PVDF binder.Electrochemical studies and investigations with SEM, HR-XRD, and XPS methods show thatirreversible processes occur in the electrodes and point at the necessity of substantial MoS2 materialsmodification to preserve their stability.

KW - anode material

KW - conducting polymer

KW - PEDOT:PSS

KW - molybdenum disulfide

KW - electrode thickness

KW - lithium-ion batteries

KW - Pedot Pss

KW - Lithium-Ion Batteries

KW - Molybdenum Disulfide

KW - Electrode Thickness

KW - Anode Material

KW - Conducting Polymer

KW - ASSISTED SYNTHESIS

KW - CAPACITY

KW - CARBON

KW - EXCELLENT ELECTROCHEMICAL PERFORMANCES

KW - GRAPHENE

KW - SURFACE MODIFICATION

KW - NANOSHEETS

KW - COMPOSITE

KW - ELECTROCATALYTIC ACTIVITY

KW - IN-SITU

UR - http://www.scopus.com/inward/record.url?scp=85115655296&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/ea3380fd-f017-33a0-aec7-83966ee5d690/

U2 - 10.20964/2021.10.18

DO - 10.20964/2021.10.18

M3 - Article

VL - 16

SP - 1

EP - 23

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

SN - 1452-3981

IS - 10

M1 - 211023

ER -