CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, People's Republic of China.
School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China.
J Am Chem Soc. 2018 Jan 10;140(1):82-85. doi: 10.1021/jacs.7b10864. Epub 2017 Dec 19.
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.
困扰固体电解质应用的关键瓶颈是金属锂和阴极之间相互矛盾的要求，它们分别需要高模量以阻止锂枝晶的渗透和柔韧性以实现低界面电阻。本研究描述了一种薄的非对称固体电解质设计，以解决这些缺点。在这种结构中，刚性陶瓷层用超薄聚合物进行修饰，朝向金属锂以实现对锂阳极的枝晶抑制，而软聚合物层覆盖在阴极的外部和内部，同时赋予其连接的界面。这种巧妙的设计使固体锂电池具有极高的库仑效率和循环稳定性。这项工作将为实现安全长寿命的储能系统开辟一条新途径。
