Preparation and Properties of ZIF-67 In-situ Loaded Cellulose Nanofibril-Based Separator for Lithium-ion Batteries Application
投稿时间：2024-02-18  修订日期：2024-03-08
DOI：
Key Words:Acetylated cellulose nanofibrils  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)
作者单位邮编
徐涌林 广西大学轻工与食品工程学院 530004
陈卓玲 广西大学轻工与食品工程学院 
崔京浩 广西大学轻工与食品工程学院 
郭滨珲 广西大学轻工与食品工程学院 
陈思颖 广西大学轻工与食品工程学院 
李 薇* 广西大学轻工与食品工程学院 530004
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Abstract:In this study, cellulose nanofibrils (CNFs) were acetylated followed by in-situ loading of ZIF-67 and electrolyte impregnation to prepare a novel ZIF-67@acetylated cellulose nanofibril (ACNF) separator for lithium-ion batteries application. The impact of particle size of ZIF-67 on the structure and performance of the separator was 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 54.1% with the ionic conductivity changed from 0.75 mS cm?1 to 0.22 mS cm?1, the interfacial resistance increased from 112.5 Ω to 1115.7 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?1 with a capacity retention rate of 90% after 200 cycles at 0.5 C under room temperature.
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