Inorganic Membrane Separators for Lithium Ion Batteries

Project: Research project

Project Details

Description

Inorganic Membrane Separators for Lithium Ion Batteries Inorganic Membrane Separators for Lithium Ion Batteries TATEMENT OF WORK Inorganic Membrane Separators for Lithium Ion Batteries Jerry Y.S. Lin School for Engineering of Matter, Transport and Energy Arizona State University Jerry.Lin@ASU.EDU Among various energy storage technologies, lithium ion battery is considered most promising because of its high energy and power density and fast response time. The state-of-the-art lithium batteries suffer from safety issues that have prevent their uses in electrical cars and energy storage. The safety issues include heat-runaway and fires on the batteries. The key factors responsible for the safety issues of lithium ion batteries are tied to their separator and electrolyte. The current separator and liquid electrolyte are made of organic materials. These materials have low thermal stability and weak mechanical strength, and are flammable. The project will focus on development of inorganic membranes as separators for lithium ion batteries. The specific work includes the following. (1) Selection of Inorganic Separator Materials and Synthesis of Nanoparticles We will focus on two groups of inorganic metal oxide materials:dense metal oxide and microporous molecular sieves. The chemical properties of the molecular sieves can be changed by adjusting silicon/aluminum ratio. Nanoparticles of dense metal oxides will be prepared by liquid method including sol-gel method, and those of molecular sieves by hydrothermal method. The particles will be characterized by XRD and DSC, SEM/TEM, nitrogen adsorption porosimetry, and FTIR. Sols containing the nanopartilces will be prepared for making separators. (2) Synthesis and Characterization of All Inorganic Separators All inorganic separators for lithium ion batteries will be prepared by two methods. Small area, relatively thick separator of inorganic materials will be prepared by press and sintering method. We will also prepare thin inorganic separator, with adequate binder, directly on copper or aluminum foil precoated with electrode, followed by pressing and infiltration of electrolyte. Half-cells containing the inorganic separator with lithium as the reference electrode will be prepared and the performance of the cells with inorganic separators will be studied. Under various conditions, the effects of operation conditions on the performance of the lithium ion batteries with inorganic separator will be studied. (3) Synthesis and Characterization of Inorganic-organic Composite Separator We will study synthesis of inorganic particle filled polymer separators for lithium ion batteries. The work will include selection and synthesis of porous organic polymer films. We will study synthesis of inorganic particle filled polymer separators by a homogenous approach. Experiments will be conducted to identify synthesis method for one step preparation of the composite inorganic-organic homogenous thin films as separator. Half battery cells using the improved inorganic-organic separator will be prepared, and the performance of the batteries will studied as described above. (4) Study of Retardation of Electrolyte Side Reaction through Separator Modification We will study coating a proper chemical on inorganic separators to control the side reaction of electrolyte in lithium ion batteries. The selection of the adequate additives will be suggested by the sponsor of this project. The modified inorganic nanoparticles will be used to make separators and half battery cells using the modified inorganic separators will be prepared and the performance of the batteries will be measured and compared with the regular lithium ion batteries to examine the effectives of the method to retard electrolyte side reaction. (5) Material Exchanges and Report If the performance of the modified separators should be texted in the sponsors research facilities, we will provide the sponsor the lab scale samples and proper instruction for testing the performance of the separator in the whole battery cell. The project will include a final report summarizing results obtained in this project.
StatusFinished
Effective start/end date9/30/139/30/17

Funding

  • INDUSTRY: Foreign Company: $275,000.00

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