On the thermal stability of olivine cathode materials for lithium-ion batteries

Surendra K. Martha; Ortal Haik; Ella Zinigrad; Ivan Exnar; Thierry Drezen; James H. Miners; Doron Aurbach

doi:10.1149/1.3622849

On the thermal stability of olivine cathode materials for lithium-ion batteries

Surendra K. Martha, Ortal Haik, Ella Zinigrad, Ivan Exnar, Thierry Drezen, James H. Miners, Doron Aurbach

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

121 Scopus citations

Abstract

The thermal stability of pristine and electrochemically delithiated LiMPO₄ (Carbon coated-LiMnPO₄, Carbon coated-LiMn _0.8 Fe_0.2PO₄, and Carbon coated-LiFePO ₄), LiCoO₂ and LiNi_0.8Co_0.15Al _0.05O₂ (NCA) composite electrodes with LiPF₆ solutions in ethylene carbonate (EC)/dimethyl carbonate (DMC) and EC/propylene carbonate (PC), was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis, coupled with mass spectrometry. The thermal reactions products were measured by XRD and electron microscopy. The LiFePO ₄ and LiMnPO₄ cathode materials were found to have comparable thermal stability in their pristine and fully delithiated states. The onset temperatures of the thermal reactions are lower in EC/DMC than in EC/PC solutions but the specific heat evolution of all the thermal reactions are higher with EC-PC solutions. No evidence was found that delithiated LiMnPO ₄ or LiMnFePO₄ have lower thermal stability than delithiated LiFePO₄. The thermal reactivity of the layered LiCoO ₂ and LiNi_0.8Co_0.15Al_0.05O ₂ cathode materials was found to be comparable to that of the LiMPO₄ materials. Oxygen release was detected from the layered compounds upon their heating around 200C.

Original language	English
Pages (from-to)	A1115-A1122
Journal	Journal of the Electrochemical Society
Volume	158
Issue number	10
DOIs	https://doi.org/10.1149/1.3622849
State	Published - 2011

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title = "On the thermal stability of olivine cathode materials for lithium-ion batteries",

abstract = "The thermal stability of pristine and electrochemically delithiated LiMPO4 (Carbon coated-LiMnPO4, Carbon coated-LiMn 0.8 Fe0.2PO4, and Carbon coated-LiFePO 4), LiCoO2 and LiNi0.8Co0.15Al 0.05O2 (NCA) composite electrodes with LiPF6 solutions in ethylene carbonate (EC)/dimethyl carbonate (DMC) and EC/propylene carbonate (PC), was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis, coupled with mass spectrometry. The thermal reactions products were measured by XRD and electron microscopy. The LiFePO 4 and LiMnPO4 cathode materials were found to have comparable thermal stability in their pristine and fully delithiated states. The onset temperatures of the thermal reactions are lower in EC/DMC than in EC/PC solutions but the specific heat evolution of all the thermal reactions are higher with EC-PC solutions. No evidence was found that delithiated LiMnPO 4 or LiMnFePO4 have lower thermal stability than delithiated LiFePO4. The thermal reactivity of the layered LiCoO 2 and LiNi0.8Co0.15Al0.05O 2 cathode materials was found to be comparable to that of the LiMPO4 materials. Oxygen release was detected from the layered compounds upon their heating around 200C.",

author = "Martha, {Surendra K.} and Ortal Haik and Ella Zinigrad and Ivan Exnar and Thierry Drezen and Miners, {James H.} and Doron Aurbach",

year = "2011",

doi = "10.1149/1.3622849",

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AU - Martha, Surendra K.

AU - Haik, Ortal

AU - Zinigrad, Ella

AU - Exnar, Ivan

AU - Drezen, Thierry

AU - Miners, James H.

AU - Aurbach, Doron

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N2 - The thermal stability of pristine and electrochemically delithiated LiMPO4 (Carbon coated-LiMnPO4, Carbon coated-LiMn 0.8 Fe0.2PO4, and Carbon coated-LiFePO 4), LiCoO2 and LiNi0.8Co0.15Al 0.05O2 (NCA) composite electrodes with LiPF6 solutions in ethylene carbonate (EC)/dimethyl carbonate (DMC) and EC/propylene carbonate (PC), was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis, coupled with mass spectrometry. The thermal reactions products were measured by XRD and electron microscopy. The LiFePO 4 and LiMnPO4 cathode materials were found to have comparable thermal stability in their pristine and fully delithiated states. The onset temperatures of the thermal reactions are lower in EC/DMC than in EC/PC solutions but the specific heat evolution of all the thermal reactions are higher with EC-PC solutions. No evidence was found that delithiated LiMnPO 4 or LiMnFePO4 have lower thermal stability than delithiated LiFePO4. The thermal reactivity of the layered LiCoO 2 and LiNi0.8Co0.15Al0.05O 2 cathode materials was found to be comparable to that of the LiMPO4 materials. Oxygen release was detected from the layered compounds upon their heating around 200C.

AB - The thermal stability of pristine and electrochemically delithiated LiMPO4 (Carbon coated-LiMnPO4, Carbon coated-LiMn 0.8 Fe0.2PO4, and Carbon coated-LiFePO 4), LiCoO2 and LiNi0.8Co0.15Al 0.05O2 (NCA) composite electrodes with LiPF6 solutions in ethylene carbonate (EC)/dimethyl carbonate (DMC) and EC/propylene carbonate (PC), was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis, coupled with mass spectrometry. The thermal reactions products were measured by XRD and electron microscopy. The LiFePO 4 and LiMnPO4 cathode materials were found to have comparable thermal stability in their pristine and fully delithiated states. The onset temperatures of the thermal reactions are lower in EC/DMC than in EC/PC solutions but the specific heat evolution of all the thermal reactions are higher with EC-PC solutions. No evidence was found that delithiated LiMnPO 4 or LiMnFePO4 have lower thermal stability than delithiated LiFePO4. The thermal reactivity of the layered LiCoO 2 and LiNi0.8Co0.15Al0.05O 2 cathode materials was found to be comparable to that of the LiMPO4 materials. Oxygen release was detected from the layered compounds upon their heating around 200C.

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On the thermal stability of olivine cathode materials for lithium-ion batteries

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