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%。
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)。
