Super Soft All-Ethylene Oxide Polymer Electrolyte for Safe All-Solid Lithium Batteries.
Super Soft All-Ethylene Oxide Polymer Electrolyte for Safe All-Solid Lithium Batteries.
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DOI：
10.1038/srep19892
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发表时间：
2016-01-21
影响因子：
4.6
通讯作者：
Nair JR
中科院分区：
文献类型：
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作者：
Porcarelli L;Gerbaldi C;Bella F;Nair JR
在这里，我们展示了通过调节基于经典−EO−的主干的迁移率，可以构建一种创新的聚合物电解质系统。这种聚合物电解质允许构建全固态锂基聚合物电池，在广泛的工作温度范围内具有出色的倍率能力和稳定性。聚合物电解质是通过紫外光诱导(Co)聚合得到的，它促进了不同锂盐浓度下由四甘醇增塑的聚氧化乙烯(PEO)链之间的有效互联。聚合物网络表现出卓越的机械稳定性、高灵活性、均质和高度无定形的特点。获得了超过0.1 ms cm−1的室温离子电导率、宽的电化学稳定窗口(>；5 V vs.Li/Li+)、优异的锂离子迁移数(>；0.6)以及界面稳定性。此外，对锂树枝晶成核和生长的有效抵抗为这些聚合物电解液在下一代在常温下工作的全固态锂金属电池中的应用奠定了基础。
Here we demonstrate that by regulating the mobility of classic −EO− based backbones, an innovative polymer electrolyte system can be architectured. This polymer electrolyte allows the construction of all solid lithium-based polymer cells having outstanding cycling behaviour in terms of rate capability and stability over a wide range of operating temperatures. Polymer electrolytes are obtained by UV-induced (co)polymerization, which promotes an effective interlinking between the polyethylene oxide (PEO) chains plasticized by tetraglyme at various lithium salt concentrations. The polymer networks exhibit sterling mechanical robustness, high flexibility, homogeneous and highly amorphous characteristics. Ambient temperature ionic conductivity values exceeding 0.1 mS cm−1 are obtained, along with a wide electrochemical stability window (>5 V vs. Li/Li+), excellent lithium ion transference number (>0.6) as well as interfacial stability. Moreover, the efficacious resistance to lithium dendrite nucleation and growth postulates the implementation of these polymer electrolytes in next generation of all-solid Li-metal batteries working at ambient conditions.