Dendrite-Free Li-Metal Battery Enabled by a Thin Asymmetric Solid Electrolyte with Engineered Layers
Dendrite-Free Li-Metal Battery Enabled by a Thin Asymmetric Solid Electrolyte with Engineered Layers
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由具有工程层的薄不对称固体电解质实现的无枝晶锂金属电池
DOI：
10.1021/jacs.7b10864
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发表时间：
2018-01-10
影响因子：
15
通讯作者：
Wan, Li-Jun
中科院分区：
文献类型：
--
作者：
Duan, Hui;Yin, Ya-Xia;Wan, Li-Jun
制约固体电解质应用的关键瓶颈是对锂金属和阴极的矛盾要求，它们分别需要高模量以阻止锂枝晶的渗透和柔性以实现低界面电阻。本研究描述了一种薄的非对称设计的固体电解质，以解决这些缺点。在该结构中，刚性陶瓷层和软质聚合物层分别覆盖在阴极的内外表面，同时赋予阳极与金属锂之间的连接界面，以实现对锂阳极枝晶的抑制。这种巧妙的安排赋予固体锂金属电池极高的库仑效率和循环能力。这项工作将为实现安全和长寿命的储能系统开辟一条途径。
The key bottleneck troubling the application of solid electrolyte is the contradictory requirements from Li-metal and cathode, which need high modulus to block Li-dendrite penetration and flexibility to enable low interface resistance, respectively. This study describes a thin asymmetrical design of solid electrolyte to address these shortcomings. In this architecture, a rigid ceramic-layer modified with an ultrathin polymer is toward Li-metal to accomplish dendrite-suppression of Li-anode, and a soft polymer-layer spreads over the exterior and interior of cathode to endow connected interface simultaneously. This ingenious arrangement endows solid Li-metal batteries with extremely high Coulombic efficiency and cyclability. This work will open up one avenue for realizing safe and long-life energy storage systems.