MODIFIED CHITIN NANOFIBER/ CELLULOSE ACETATE BASED MEMBRANE AS LI-ION BATTERY SEPARATOR
The growth of Li-ion battery consumption in particular has increased significantly to support emission reduction plans, the development of renewable energy systems, and to minimize the impact of pollution that causes environmental damage. However, the growing demand for Li-ion batteries in the fu...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68422 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The growth of Li-ion battery consumption in particular has increased significantly to
support emission reduction plans, the development of renewable energy systems, and to
minimize the impact of pollution that causes environmental damage. However, the growing
demand for Li-ion batteries in the future will also be proportional to the increase of battery
waste. Battery waste can be recycled to obtain active material from the electrodes, though the
components such as separator cannot be recycled and are not easily degraded. The commercial
separator composed of polyolefin material which is not biodegradable and not sustainable. To
support the prevention of environmental damage, in this research, an alternative separator
was made from biopolymer chitin nanofiber (CH) with a mixture of cellulose acetate (CA). The
modified CA/CH separator was fabricate using the phase inversion technique. The obtained
membrane has a thickness between 100-180 m. The results of Scanning Electron Microscopy
characterization showed an asymmetric pore structure with various pore size. The mixture of
chitin nanofibers in cellulose acetate can prevent the formation of wrinkles in the membrane
fabrication process. Thermal analysis using Thermogravimetry Analysis showed an increase
in thermal stability in the presence of chitin nanofiber (CH). The thermal shrinkage test showed
that the membrane was dimensionally stable with a shrinkage rate of 4% at a temperature of
90oC compared to commercial PP separator (Celgard 2400). Membrane with 15 % (w/v) CH
concentration showed high electrolyte absorption around 800%, 65% porosity and
conductivity value of 5.7 x 10-1 mS.cm-1. This high conductivity value are expected to support
optimal battery performance.
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