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Effects of binder content on manganese dissolution and electrochemical performances of spinel lithium manganese oxide cathodes for lithium ion batteries

Title
Effects of binder content on manganese dissolution and electrochemical performances of spinel lithium manganese oxide cathodes for lithium ion batteries
Authors
Kim, EY[Kim, Eun-Young]Lee, BR[Lee, Bo-Ram]Yun, G[Yun, Giyeong]Oh, ES[Oh, Eun-Suok]Lee, H[Lee, Hochun]
DGIST Authors
Kim, EY[Kim, Eun-Young]; Lee, H[Lee, Hochun]
Issue Date
2015-04
Citation
Current Applied Physics, 15(4), 429-434
Type
Article
Article Type
Article
Keywords
BinderBindersDissolutionElectric BatteriesElectro-Chemical ElectrodesElectrochemical Impedance MeasurementsElectrochemical PerformanceElectrode ImpedanceElectrodesElevated TemperatureFluorine CompoundsLithiumLithium-Ion BatteriesLithium AlloysLithium BatteriesLithium CompoundsLithium Ion BatteryLoadingManganeseManganese DissolutionManganese OxideOxidesPassivation LayerPolyvinylidene FluoridePolyvinylidene FluoridesSpinel Lithium Manganese OxideSpinel Lithium Manganese OxidesX Ray Photoelectron Spectroscopy
ISSN
1567-1739
Abstract
In this study, the effects of the polyvinylidene fluoride (PVdF) binder on the Mn dissolution behavior and electrochemical performances of LiMninf2/infOinf4/inf (LMO) electrodes are investigated. It is found that increasing the PVdF content (3, 5, 7, and 10 wt.%) leads to reduced Mn dissolution, and thus superior cycle performance at elevated temperature (60 °C). This can be ascribed to increased binder coverage on the LMO surface, as evidenced by X-ray photoelectron spectroscopy measurements, which acts a role as a passivation layer for Mn dissolution. The rate capability of the LMO electrode is hardly deteriorated as the PVdF content increases, despite the increasing surface coverage. Electrochemical impedance measurements reveal that the LMO electrode with higher binder loading exhibits lower electrode impedance, which is suggested to be due to enhanced electronic passage through the composite LMO electrode. © 2015 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/2914
DOI
10.1016/j.cap.2015.01.029
Publisher
Elsevier B.V.
Related Researcher
  • Author Lee, Ho Chun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
Files:
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Collection:
Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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