TY - JOUR
T1 - A combination of nonsolvent and thermally induced phase separation (N-TIPS) technique for the preparation of highly porous cellulose acetate membrane as lithium-ion battery separators
AU - Arundati, Annisaa Hayya
AU - Ratri, Christin Rina
AU - Chalid, Mochamad
AU - Aqoma, Havid
AU - Nugraha, Adam F.
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2023/10/24
Y1 - 2023/10/24
N2 - Polyolefin-based lithium-ion battery separators generally exhibit poor wettability and low porosity, which hamper their ability to preserve electrolyte solution, thus adversely impacting battery performance because it correlates with ionic transport. Therefore, developing a separator with better wettability and porosity has received significant interest in improving battery performance due to its contribution to ionic transport. Herein, porous cellulose acetate (CA) separators were prepared via nonsolvent and thermally induced phase separation (N-TIPS) technique using N-methyl-2-pyrrolidone (NMP) as the polymer solvent and water as the nonsolvent. A glass plate was casted with cellulose acetate dissolved in NMP. Following this, the polymer solution was evaporated at 75 °C, then was immersed in a water coagulation bath as the nonsolvent, resulting in a flexible membrane. An evaporation time at 55, 65, or 75 min was performed to determine how evaporation affected the structures of membrane pore. CA-based separator that treated with 55 min of evaporation generates the highest ionic conductivity of 3.07 × 10−2 mS.cm−1, which can be attributed to their uniform microporous structure, porosity of 62%, and electrolyte uptake of 331%. In comparison to Celgard, a commercial polyolefin-based separator that just able to generate an ionic conductivity of 9.41 × 10−4 mS.cm−1, the CA 55 membrane exhibits far superior electrochemical performance. Based on these results, the CA 55 membrane is considered a feasible alternative for utilization in lithium-ion battery separators.
AB - Polyolefin-based lithium-ion battery separators generally exhibit poor wettability and low porosity, which hamper their ability to preserve electrolyte solution, thus adversely impacting battery performance because it correlates with ionic transport. Therefore, developing a separator with better wettability and porosity has received significant interest in improving battery performance due to its contribution to ionic transport. Herein, porous cellulose acetate (CA) separators were prepared via nonsolvent and thermally induced phase separation (N-TIPS) technique using N-methyl-2-pyrrolidone (NMP) as the polymer solvent and water as the nonsolvent. A glass plate was casted with cellulose acetate dissolved in NMP. Following this, the polymer solution was evaporated at 75 °C, then was immersed in a water coagulation bath as the nonsolvent, resulting in a flexible membrane. An evaporation time at 55, 65, or 75 min was performed to determine how evaporation affected the structures of membrane pore. CA-based separator that treated with 55 min of evaporation generates the highest ionic conductivity of 3.07 × 10−2 mS.cm−1, which can be attributed to their uniform microporous structure, porosity of 62%, and electrolyte uptake of 331%. In comparison to Celgard, a commercial polyolefin-based separator that just able to generate an ionic conductivity of 9.41 × 10−4 mS.cm−1, the CA 55 membrane exhibits far superior electrochemical performance. Based on these results, the CA 55 membrane is considered a feasible alternative for utilization in lithium-ion battery separators.
KW - Cellulose acetate
KW - Lithium-ion battery separators
KW - Microporous membrane
KW - N-TIPS
UR - http://www.scopus.com/inward/record.url?scp=85174602815&partnerID=8YFLogxK
U2 - 10.1007/s11581-023-05276-5
DO - 10.1007/s11581-023-05276-5
M3 - Article
AN - SCOPUS:85174602815
SN - 0947-7047
VL - 30
SP - 123
EP - 133
JO - Ionics
JF - Ionics
IS - 1
ER -