Morphology and conductivity study of solid electrolyte Li3PO4

Prayogi, Lugas Dwi; Faisal, Muhamad; Kartini, Evvy; Honggowiranto, Wagiyo; Supardi, .

doi:10.1063/1.4941513

Cited by 10 publications

(7 citation statements)

References 11 publications

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“…The C600-air sample presents even poorer electrochemical performances as the charge–discharge curve shows a high internal resistance, and the second cycle capacity is far below the C-mixed reference, reaching only 28 mAh/g. This latter result is in agreement with the XRD analyses, which revealed that high-temperature treatment induces a decomposition of NMC to electrochemically inactive and insulating spinel and rocksalt-MO compounds and the formation of Li 3 PO 4 , which is non-conductive at 600 °C. However, at lower temperature, the samples have already started to degrade, either at the surface level or in negligible amount, as they were not detected by XRD.…”

Section: Resultssupporting

confidence: 90%

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

Valiyaveettil-SobhanRaj

Cid

Thompson

et al. 2023

ACS Appl. Mater. Interfaces

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Temperature-assisted densification methods are typically used in oxide-based solid-state batteries to suppress resistive interfaces. However, chemical reactivity among the different cathode components (which include a catholyte, the conducting additive, and the electroactive material) still represents a major challenge and processing parameters need thus to be carefully selected. In this study, we evaluate the impact of temperature and heating atmosphere in the LiNi0.6Mn0.2Co0.2O2 (NMC), Li1+x Al x Ti2–x P3O12 (LATP), and Ketjenblack (KB) system. A rationale of the chemical reactions between components is proposed from the combination of bulk and surface techniques and overall involves a cation redistribution in the NMC cathode material that is accompanied by the loss of lithium and oxygen from the lattice enhanced by LATP and KB, which act as lithium and oxygen sinks. The final result is the formation of several degradation products, starting at the surface, that lead to a rapid capacity decay above 400 °C. Both the reaction mechanism and threshold temperature depend on the heating atmosphere, with the air atmosphere being more favorable compared to oxygen or any other inert gases.

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Section: Resultssupporting

confidence: 90%

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

Valiyaveettil-SobhanRaj

Cid

Thompson

et al. 2023

ACS Appl. Mater. Interfaces

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“…According to literature, a thick or overly‐dense coating of a material with poor electronic conductivity can increase the charge‐transfer resistance [30,54] . Keeping in mind that lithium phosphate can also be used as a solid electrolyte [37] because of its low electronic conductivity, this implies that for a Li 3 PO 4 coating a compromise between a reduction of the surface film resistance R f and an increased charge transfer resistance R ct has to be made, which seems to be the case with the medium coating amount (c02‐NCA).…”

Section: Resultsmentioning

confidence: 99%

“…However, to the best of the authors’ knowledge, a phosphate‐coated NCA has never been used in a combination with a water‐based electrode manufacturing process. Amongst the phosphate coatings mentioned above, Li 3 PO 4 is relatively easy to synthesize and, in contrast to other metal phosphates such as Ni 3 (PO 4 ) 2 , Co 3 (PO 4 ) 2 , BiPO 4 , FePO 4 , MgHPO 4 , and AlPO 4, a lithium‐ion conductor [36,37] . The latter aspect might comparatively facilitate the migration of lithium ions through the particles surface.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of LiNi_0.8Co_0.15Al_0.05O₂ Particles via Li₃PO₄ Coating to Enable Aqueous Electrode Processing

et al. 2020

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The successful implementation of an aqueous-based electrode manufacturing process for nickel-rich cathode active materials is challenging due to their high water sensitivity. In this work, the surface of LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) was modified with a lithium phosphate coating to investigate its ability to protect the active material during electrode production. The results illustrate that the coating amount is crucial and a compromise has to be made between protection during electrode processing and sufficient electronic conductivity through the particle surface. Cells with water-based electrodes containing NCA with an optimized amount of lithium phosphate had a slightly lower specific discharge capacity than cells with conventional Nmethyl-2-pyrrolidone-based electrodes. Nonetheless, the cells with optimized water-based electrodes could compete in terms of cycle life. the active material by applying surface coatings seems to be very promising. [6-11,16] LiNiCoAlO 2 (NCA) has attracted significant attention as a cathode active material because of its high energy density. [17] However, NCA is known to be extremely sensitive to moisture, [15,18-20] making it a difficult candidate for the aqueous electrode processing. According to the results in the literature, it is assumed that aqueous processing of NCA will not be successful without additional surface modifications, prior to electrode fabrication [10,11] or in situ surface modification during processing [8,9] or in a combination of both. [21] The strong PÀ O-bonding energy in the PO 4 3À ion gives metal phosphates high structural stability against chemical attack. [22-24] Various phosphate coatings such as Ni 3 (PO 4) 2 , [25] FePO 4 , [26] LiMnPO 4 , [27] MgHPO 4 , [28] BiPO 4 , [29] Li 1.3 Al 0.3 Ti 1.7 (PO 4) 3 , [30] Li 3 PO 4 , [23,31] Co 3 (PO 4) 2 , [32,33] LiFePO 4 , [34] and AlPO 4 [31,33,35] have been studied on NCA and resulted in improved electrochemical performance. However, to the best of the authors' knowledge, a phosphatecoated NCA has never been used in a combination with a waterbased electrode manufacturing process. Amongst the phosphate coatings mentioned above, Li 3 PO 4 is relatively easy to synthesize and, in contrast to other metal phosphates such as Ni 3 (PO 4) 2 , Co 3 (PO 4) 2 , BiPO 4 , FePO 4 , MgHPO 4 , and AlPO 4, a lithium-ion conductor. [36,37] The latter aspect might comparatively facilitate the migration of lithium ions through the particles surface. Therefore, in this study, the surface of LiNi 0.8 Co 0.15 Al 0.05 O 2 particles was modified by applying Li 3 PO 4 coatings via a simple precipitation reaction. The modified particles are compared with pristine NCA in terms of their processability in water and their electrochemical performance in cells. Finally, the cycle stability of cells with electrodes prepared via an aqueous and the conventional NMP route as reference is investigated.

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“…Beberapa penelitian dilaporkan telah melakukan analisis tentang struktur senyawa ini, melalui karakterisasi sinar-X [6], karakterisasi neutron [7] dan melalui simulasi komputer [8,9]. Penelitian tentang morfologi senyawa ini juga telah dilaporkan dengan investigasi menggunakan Scanning Electron Microscopy (SEM) [10].…”

Section: Pendahuluanunclassified

SINTESIS DAN KAJIAN PERILAKU KONDUKTIVITAS KOMPOSISI BARU ELEKTROLIT PADAT (Li2O)x(P2O5)y

Jodi¹,

Zulfia²,

Sudjatno³

et al. 2017

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SINTESIS DAN KAJIAN PERILAKU KONDUKTIVITAS KOMPOSISI BARU ELEKTROLIT PADAT (Li 2 O) x (P 2 O 5) y. Bahan elektrolit padat (Li 2 O) x (P 2 O 5) y dengan komposisi konten Li 2 O sebesar x = 24 %berat dan 28 %berat telah dipreparasi menggunakan teknik reaksi padat pada suhu di bawah suhu lelehnya. Paduan yang telah dipreparasi kemudian dikarakterisasi menggunakan Scanning Electron Microscopy (SEM) dan Electrochemical Impedance Spectroscopy (EIS) untuk diperiksa morfologi, sifat elektrokimia dan konduktivitasnya. Karakterisasi elektrokimia menunjukkan bahwa nilai konduktivitas kedua paduan berada pada orde 10-6 S/cm, setara dengan nilai konduktivitas paduan Li 4 P 2 O 7 yang dipreparasi pada suhu lebih tinggi dengan kandungan Li 2 O lebih banyak, dan lebih tinggi dari konduktivitas senyawa Li 3 PO 4. Taksiran nilai eksponen frekuensi dari formula konduktivitas AC, memperlihatkan bahwa kemungkinan sumber konduksi ion dalam bahan yang diamati salah satunya adalah aliran ion jarak jauh. Kurva rugi dielektrik menunjukkan bahwa konduksi dalam bahan elektrolit ini didominasi oleh konduksi DC.

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Morphology and conductivity study of solid electrolyte Li3PO4

Cited by 10 publications

References 11 publications

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

Surface Modification of LiNi_0.8Co_0.15Al_0.05O₂ Particles via Li₃PO₄ Coating to Enable Aqueous Electrode Processing

SINTESIS DAN KAJIAN PERILAKU KONDUKTIVITAS KOMPOSISI BARU ELEKTROLIT PADAT (Li2O)x(P2O5)y

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Morphology and conductivity study of solid electrolyte Li3PO4

Cited by 10 publications

References 11 publications

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

High-Temperature Thermal Reactivity and Interface Evolution of the NMC-LATP-Carbon Composite Cathode

Surface Modification of LiNi0.8Co0.15Al0.05O2 Particles via Li3PO4 Coating to Enable Aqueous Electrode Processing

SINTESIS DAN KAJIAN PERILAKU KONDUKTIVITAS KOMPOSISI BARU ELEKTROLIT PADAT (Li2O)x(P2O5)y

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Surface Modification of LiNi_0.8Co_0.15Al_0.05O₂ Particles via Li₃PO₄ Coating to Enable Aqueous Electrode Processing