Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control
Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control
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DOI：
10.1021/acsami.9b15463
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发表时间：
2019-12-04
影响因子：
9.5
通讯作者：
Hatzell, Kelsey B.
中科院分区：
文献类型：
--
作者：
Dixit, Marm B.;Zaman, Wahid;Hatzell, Kelsey B.
混合固体电解质是高能量密度金属锂电池的理想替代品。可扩展制造具有定制传输路径的多材料电解质可以为控制全固态器件中的Li剥离和沉积机制提供途径。一种新型的卷对卷兼容共挤压装置被证明研究制造过程中的细观结构控制。研究了25%和7swt % PEO-LLZO组成的固体电解质。共挤压头被证明可以有效地加工具有严格成分梯度的多材料薄膜。在所有制造的电解质中，厚度的平均制造变异性为5.75 +/- 1.2 μ m。与单一材料薄膜的电导率(25 wt %, 1.2 x 10(-6) S 75 wt %, 1.8 x 10（-6) S cm(-1)）相比，具有1毫米条纹的共挤压膜的室温电导率最高，为8.8 x 10（-6) S cm(-1)）。弛豫时间分布和有效平均场理论计算表明，两种材料之间产生的界面具有较高的离子导电性能。计算模拟进一步证实了宏观界面对离子输运的影响。
Hybrid solid electrolytes are promising alternatives for high energy density metallic lithium batteries. Scalable manufacturing of multi-material electrolytes with tailored transport pathways can provide an avenue toward controlling Li stripping and deposition mechanisms in all-solid-state devices. A novel roll-to-roll compatible coextrusion device is demonstrated to investigate mesostructural control during manufacturing. Solid electrolytes with 25 and 7S wt % PEO-LLZO compositions are investigated. The coextrusion head is demonstrated to effectively process multimaterial films with strict compositional gradients in a single pass. An average manufacturing variability of 5.75 +/- 1.2 mu m is observed in the thickness across all the electrolytes manufactured. Coextruded membranes with 1 mm stripes show the highest room temperature conductivity of 8.8 x 10(-6) S cm(-1) compared to the conductivity of single-material films (25 wt %, 1.2 x 10(-6) S 75 wt %, 1.8 x 10(-6) S cm(-1)). Distribution of relaxation times and effective mean field theory calculations suggest that the interface generated between the two materials possesses high ion-conducting properties. Computational simulations are used to further substantiate the influence of macroscale interfaces on ion transport.