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Preparation and Properties of ZIF-67 In-situ Loaded Cellulose Nanofibril-based Separator for Lithium-ion Batteries
Received:March 08, 2024  
DOI：10.11980/j.issn.0254-508X.2024.05.009
Key Words:acetylated cellulose nanofibril  ZIF-67  separator  lithium-ion batteries
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）；广西高等学校千名中青年骨干教师培育计划项目；广西大学科研基金项目（学术骨干项目）（XGZ170232）；特色木质纤维资源清洁高效分离与利用（2023GXNSFGA026001）。
Author NameAffiliationPostcode
XU Yonglin College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
CHEN Zhuoling College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
CUI Jinghao College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
GUO Binhui College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
CHEN Siying College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
LI Wei* College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
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Abstract:In this study， cellulose nanofibril （CNF） was acetylated followed by in-situ loading of ZIF-67 and electrolyte impregnation to prepare a novel ZIF-67@acetylated cellulose nanofibril （ZIF-67@ACNF） separator for lithium-ion batteries. The effects of particle size of ZIF-67 on the structure and performance of the separator were systematically investigated. The results showed that as the particle size of ZIF-67 decreased from 0.46 μm （in ZIF-674@ACNF separator） to 0.25 μm （in the ZIF-678@ACNF separator）， the porosity of the separator reduced from 74.2% to 52.1%， the ionic conductivity decreased from 0.75 mS/cm to 0.22 mS/cm， the interfacial resistance increased from 112.5 Ω to 1 115.7 Ω， the lithium-ion transference number declined from 0.41 to 0.31， and the electrochemical stability window went down from 5.1 V to 4.5 V. The initial capacity of assembled cell by ZIF-674@ACNF separator reached 159.6 mAh/g with a capacity retention rate of 90% after 200 cycles at 0.5 C under room temperature.
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