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In order to ensure environmentally friendly mobility, electric drives are increasingly being used. As a result, the number of used lithium-ion batteries has been rising steadily for years. To ensure a closed recycling loop, these batteries must be recycled in an energy- and raw material-efficient manner. For this purpose, hydrometallurgical processes are combined with mechanical pre-treatment, including disintegration by mills, crushers and/or shears. Alternatively, electrohydraulic fragmentation (EHF) is also of great interest, as it is considered to have a selective fragmentation effect. For a better comparison, different application scenarios of EHF with other methods of mechanical process engineering for the treatment of lithium-ion batteries are investigated in the present study.

According to investigations conducted on the median fiber length, mass‐specific energy consumption, Young modulus and minimal content of epoxy adhesion, the extraction of free carbon fibers from carbon fiber reinforced polymers by electrohydraulic fragmentation can be considered as downcycling. This means that the gained secondary raw material has a lower product quality than the virgin material and the energy required for its production is higher than for the virgin fibers. [ABSTRACT FROM AUTHOR]

The preliminary tests present that the electrohydraulic fragmentation of carbon fiber reinforced polymer (CFRP) is generally feasible and frees carbon fibers. Just like other recycling processes for carbon fibers, the demonstrated method has its advantages and disadvantages. In consideration of the test series for the composite material CFRP and its single components epoxy resin and carbon fibers, under uniform processing conditions during shock wave treatment by 1 to 500 pulse per 600 J charging energy, first research findings are gained by electrohydraulic recycling of CFRP. [ABSTRACT FROM AUTHOR]

In order to ensure environmentally friendly mobility, electric drives are increasingly being used. As a result, the number of used lithium-ion batteries has been rising steadily for years. To ensure a closed recycling loop, these batteries must be recycled in an energy- and raw material-efficient manner. For this purpose, hydrometallurgical processes are combined with mechanical pre-treatment, including disintegration by mills, crushers and/or shears. Alternatively, electrohydraulic fragmentation (EHF) is also of great interest, as it is considered to have a selective fragmentation effect. For a better comparison, different application scenarios of EHF with other methods of mechanical process engineering for the treatment of lithium-ion batteries are investigated in the present study. [ABSTRACT FROM AUTHOR]