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| Preparation and Properties of ZIF-67 Doped Paper-based Separator for Lithium-ion Batteries |
| Received:August 24, 2022 |
| DOI：10.11980/j.issn.0254-508X.2022.11.011 |
| Key Words:paper-based separator sisal fiber ZIF-67 carboxymethylation electrochemical properties |
| Fund Project:广西青年科学基金项目（2018GXNSFBA138027）；广西高校中青年教师基础能力提升项目（2018KY0023）；广西大学科研基金项目（学术骨干项目）（XGZ170232）。 |
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| Abstract:In the study， cobalt 2-methylimidazole （ZIF-67） was added into sisal pulp followed by filtration and then produced to ZIF-67 doped paper-based separator for lithium-ion batteries（LIBs）. The results showed that the porosity of paper-based separators for LIBs decreased from 74.5% to 45.5% with the increase of the ZIF-67 dosage from 0 to 30%， and the affinity of separators to liquid electrolyte enhanced， ionic conductivity increased from 0.29 mS/cm to 2.58 mS/cm， interfacial resistance decreased from 467 Ω to 210 Ω， and electrochemical stability window increased from 4.6 V to 5.2 V. When the doping content of ZIF-67 was 30%， the capacity retention rate of assembled LIBs was up to 90% after 50 cycles. When the sisal fibers were modified by carboxymethylation， the porosity of the paper-based separators for LIBs increased， and the electrochemical properties were also improved. However， the capacity of the separators rapidly decreased due to its poor mechanical strength. |
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