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Merck
CN

940550

Lithium aluminum germanium phosphate

greener alternative

LAGP solid electrolyte, powder

Synonym(s):

Phosphate solid electrolyte

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About This Item

Linear Formula:
Li1.5Al0.5Ge1.5(PO4)3
CAS Number:
UNSPSC Code:
12352302
NACRES:
NA.21
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SMILES string

[Li].[Al].[Ge].O=P([O-])([O-])[O-]

description

battery grade

assay

99.9%

form

powder

mol wt

471.77 g/mol

composition

(Li1.5Al0.5Ge1.5(PO4)3)

Quality Level

greener alternative product characteristics

Design for Energy Efficiency
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sustainability

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density

3.6 g/mL ((lit.))

application(s)

battery manufacturing

greener alternative category

General description

Lithium aluminum germanium phosphate (LAGP) is a ceramic solid electrolyte material characterized by its high ionic conductivity of lithium ions and excellent chemical stability. LAGP adopts a NASICON-type crystal structure, providing a conducive environment for lithium-ion diffusion. With an ionic conductivity surpassing 10-4 S cm-1, LAGP facilitates efficient lithium-ion transport, which is crucial for the performance of all-solid-state lithium batteries. In contrast to other solid electrolyte materials, LAGP offers good stability against moisture and air, which allows for easier handling and processing. Our LAGP is a powder form with a typical particle size of 2-3 microns.
Lithium Aluminium Germanium Phosphate (LAGP) is a solid-state electrolyte known for its high ionic conductivity and chemical stability. Its use in batteries supports greener technologies by enhancing safety, extending battery life, and enabling the development of more sustainable, efficient, and environmentally friendly energy storage systems. Click here for more information.

Application

LAGP is one of the top-choices for solid electrolyte in ASSLBs. LAGP powder is typically processed into thin films through pressing a pellet and sintering at temperatures between 800–900 °C. One advantage of LAGP compared to other solid electrolytes it that its thin films typically exhibit superior mechanical strength, crucial for resisting lithium dendrite growth and maintaining structural integrity within battery cells. Because LAGP is stable with most high-voltage cathode materials, LAGP is also commonly mixed with cathode material to form a composite cathode or "catholyte", which helps form continuous ionic conduction pathways through the interface between the electrodes and the solid electrolyte. Direct contact with lithium metal anodes, however, requires strategic interfacial engineering such as coatings or intermediary layers to promote stable anode/electrolyte interfaces. Furthermore, LAGP′s versatility extends to its role in polymer-ceramic composite electrolytes, where it synergizes with polymers such as PEO-LiTFSI to form a matrix that supports enhanced ionic conductance and structural flexibility.
battery manufacturing

Storage Class

13 - Non Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Yue Zhang et al.
Nanomaterials (Basel, Switzerland), 12(11) (2022-06-11)
Lithium aluminum germanium phosphate (LAGP) solid electrolyte is receiving increasing attention due to its high ionic conductivity and low air sensitivity. However, the poor interface compatibility between lithium (Li) metal and LAGP remains the main challenge in developing all-solid-state lithium
Li+ Conduction in a Polymer/Li1.5 Al0.5Ge1.5(PO4)3 Solid Electrolyte and Li-Metal/Electrolyte Interface
Li Q, et al.
Molecules (Basel), 28(24), 8029-8029 (2023)
Hongzheng Zhu et al.
Nanomaterials (Basel, Switzerland), 9(8) (2019-08-01)
Sodium superionic conductor (NASICON)-type lithium aluminum germanium phosphate (LAGP) has attracted increasing attention as a solid electrolyte for all-solid-state lithium-ion batteries (ASSLIBs), due to the good ionic conductivity and highly stable interface with Li metal. However, it still remains challenging

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