We have introduced the use of breakable electrodes for mitigating mechanical abuse to LIBs, such as what may occur during a car crash. This technology involves electrically isolating the internally shorted part of the battery from the rest of the cell before the separator is punctured.
The methodology involves upfront consideration of analysis paths that will be conducted on the exposed internal components to preserve the state (operational or failed) of the battery. The disassembly processes and exposures must not alter the battery materials once they are removed from their hermetically sealed containers.
It should be noted, that the specific capacity loss of graphite depends on the surface area , in particular on the prismatic surface area , , , . For the here used electrodes in this work the discharge electrode potential of NMC111 is 3.67 V vs. Li/Li + at the onset of the Cu current collector dissolution of SFG6 graphite.
This technology involves electrically isolating the internally shorted part of the battery from the rest of the cell before the separator is punctured. By limiting the current passing through the shorted area, heat generation can be minimized to prevent thermal runaway.
In a three-electrode cell set-up, the use of a reference electrode (RE) enables the investigation of aging phenomena of the each individual electrode via monitoring the respective potential profiles , , , , .
The remainder of this paper outlines the considerations that should be taken when disassembling a battery in order to produce test results that are indicative of the true operating state of the battery. Before a battery is disassembled, precautions must be taken to ensure the safety of any handlers during the disassembly process.
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