Stable and reversible zinc metal anode with fluorinated graphite nanosheets surface coating  

稳定可逆的氟化石墨纳米片涂层锌金属负极

作　　者：Hong CHANG Zhen-ya LUO Xue-ru SHI Xin-xin CAO Shu-quan LIANG 常鸿;罗振亚;石雪茹;曹鑫鑫;梁叔全(中南大学材料科学与工程学院电子封装及先进功能材料湖南省重点实验室,长沙410083;湘潭大学材料科学与工程学院,湘潭411105)

机构地区：[1]Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,School of Materials Science and Engineering,Central South University,Changsha 410083,China [2]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第10期3358-3371,共14页中国有色金属学报（英文版）

基　　金：supported by Young Elite Scientists Sponsorship Program by CAST,China(No.2023QNRC001);the Science and Technology Innovation Program of Hunan Province,China(No.2022RC1078);the Natural Science Foundation of Hunan Province,China(No.2023JJ10060);the Scientific Research Fund of Hunan Provincial Education Department,China(No.23A0003)。

摘　　要：A highly stable zinc metal anode modified with a fluorinated graphite nanosheets(FGNSs)coating was designed.The porous structure of the coating layer effectively hinders lateral mass transfer of Zn ions and suppresses dendrite growth.Moreover,the high electronegativity exhibited by fluorine atoms creates an almost superhydrophobic solid-liquid interface,thereby reducing the interaction between solvent water and the zinc substrate.Consequently,this leads to a significant inhibition of hydrogen evolution corrosion and other side reactions.The modified anode demonstrates exceptional cycling stability,as symmetric cells exhibit sustained cycling for over 1400 h at a current density of 5 mA/cm^(2).Moreover,the full cells with NH_(4)V_(4)O_(10)cathode exhibit an impressive capacity retention rate of 92.2%after undergoing 1000 cycles.设计了一种采用氟化石墨纳米片涂层改性的高稳定锌金属负极。涂层具有多孔结构,阻止锌离子横向传质,并抑制枝晶生长;氟原子的高电负性形成近乎超疏水的固液界面,减少溶剂水与锌基体之间的相互作用,抑制析氢腐蚀和其他副反应。涂层负极表现出优异的循环稳定性,对称电池在电流密度5 mA/cm^(2)条件下稳定循环超过1400 h;使用NH_(4)V_(4)O_(10)正极的全电池在循环1000次后容量保持率为92.2%。

关 键 词：fluorinated graphite hydrophobic coating ANTI-CORROSION dendrite suppression zinc metal anode 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]