Can nanofiltration membranes selectively recover lithium from spent lithium-ion batteries?

Given the critical requirements of environmental preservation and resource reutilization, the recovery of lithium from spent lithium-ion (LIBs) batteries holds immense significance. This study investigates the viability of nanofiltration (NF) membranes for selectively separating lithium from spent LIBs leaching solution.

Can a polyamide nanofiltration membrane be used to recycle lithium?

Herein, we present a polyamide nanofiltration membrane based on the positively charged nanoscale dispersion interlayer for the first application in recycling lithium from the leaching solution of spent T-LIBs. The electronegativity is weakened by positive charge within the interlayer, which enhance the effect of Donnan exclusion.

How is a lithium ion battery made?

A lithium ion battery is primarily comprised of electrodes (cathode and anode), separators and an electrolyte solution. The manufacturing process, which is outlined in Figure 1, involves forming the electrodes, stacking the cells, adding the electrolyte solution, charging the battery, aging and final inspection.

How to choose a Li-ion battery filter?

The internal filter element, micron rating and efficiency are selected based on the specific operating conditions of the Li-Ion battery manufacturing process. 5-micron polyester (99+% efficient) performs well in most cases; however, different filter media, micron ratings, and efficiencies are available depending on the specific process conditions.

How do lithium ions protect a battery?

Lithium ions are embedded into the graphite crystals of the anode, which creates a protective layer between the electrode and the electrolyte called the Solid Electrolyte Interface (SEI). This layer is critical for preventing self-discharge over the lifespan of a battery.

Does filtration improve battery performance?

Filtration has been found to significantly improve battery quality and performance. Proper filter selection is required to remove particulate contaminants and gels from solvents, water and the high viscosity slurries used in forming the electrodes. Filters are also needed to remove particle contamination during the electrolyte filling process.