材料科学
阳极
化学工程
纳米颗粒
电解质
锂(药物)
聚合物
离子电导率
纳米技术
电极
复合材料
物理化学
医学
工程类
内分泌学
化学
作者
Sipei Li,Tong Liu,Jiajun Yan,Jacob A. Flum,Han Wang,Francesca Lorandi,Zongyu Wang,Liye Fu,Leiming Hu,Yuqi Zhao,Rui Yuan,Mingkang Sun,Jay Whitacre,Krzysztof Matyjaszewski
出处
期刊:Nano Energy
[Elsevier]
日期:2020-10-01
卷期号:76: 105046-105046
被引量:34
标识
DOI:10.1016/j.nanoen.2020.105046
摘要
Fabricating an artificial solid electrolyte interface (SEI) is a promising approach to improve cycling stability of lithium metal batteries. In this work, a new category of artificial SEI based on oxygen vacancy-rich hybrid nanoparticles was prepared by covalently grafting polymers from yttria–stabilized zirconia (YSZ) nanoparticles via surface-initiated atom transfer radical polymerization (SI-ATRP). The hairy nanoparticles had high dispersibility in dimethylsulfoxide, and were solution casted into uniform thin films with high inorganic content, high ionic conductivity (>1 × 10−4 S/cm at r.t.), and good mechanical properties (Young's modulus 7.56 GPa). No dendrite formation was observed by in-situ optical microscopy on a lithium metal protected by such artificial SEI. Protected anodes were stably cycled at 3 mA/cm2 and 3 mA h/cm2 with low overpotentials (20 mV) for >2500 h. LiNi0.8Co0.15Al0.05O2 (NCA)|Li full cells with protected Li anode showed much higher specific discharge capacity at various rates and improved capacity retention compared to unprotected Li anode.
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