Lithium/metal batteries with microstructured solid electrolytes

Abstract

In one embodiment, an electrochemical cell comprises: an anode comprising lithium form; a cathode spaced apart from said anode; and a microstructured composite separator positioned between said anode and said cathode, said The microstructured composite separator includes a first layer adjacent to the anode, a second layer positioned between the first layer and the cathode, and extending from the first layer toward the second layer. Multiple solid electrolyte assemblies.

Description

[0001] cross reference [0002] This application claims the benefit of US Provisional Application No. 61 / 867,050, filed August 17, 2013, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to batteries and more particularly to lithium-metal batteries. Background technique [0004] Batteries are a useful source of stored energy that can be incorporated into many systems. Rechargeable lithium-ion ("Li-ion") batteries are attractive energy storage systems for portable electronic devices and electric and hybrid electric vehicles because of their high specific energy compared to other electrochemical energy storage devices. In particular, batteries in the form of lithium metal incorporated into the negative electrode offer exceptionally high specific energy (measured in Wh / kg) and energy density (measured in Wh / kg) compared to batteries with conventional carbonaceous negative electrodes. L to measure). [0005] Whe...

AI Technical Summary

Problems solved by technology

This scheme has several disadvantages: 1) The recombination conductivity is too low at room temperature because the intrinsic conductivity of the conducting phase is low, and the high shear modulus phase does not conduct lithium ions, thus further weakening the recombination conductivity ; 2) The polymer generally absorbs liquid and thus is not an effective barrier between Li metal and the liquid electrolyte in the positive electrode or separator; 3) Li-conducting polymers usually operate at high positive electrode potentials (>3.9 V, phase to Li phase). than) unstable

However, in practice, the high interfacial resistance between ceramic particles and at the ceramic / polymer interface leads to very limited transport of Li ions through ceramics.

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