Three-Dimensional-Percolated Ceramic Nanoparticles along Natural-Cellulose-Derived Hierarchical Networks for High Li+ Conductivity and Mechanical Strength.,Nano Letters

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Three-Dimensional-Percolated Ceramic Nanoparticles along Natural-Cellulose-Derived Hierarchical Networks for High Li+ Conductivity and Mechanical Strength.
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-09 , DOI: 10.1021/acs.nanolett.0c02721
Chao Wang _{1,

2} , Dafang Huang ₁ , Shiheng Li ₁ , Jianming Yu ₁ , Mingwei Zhu ₁ , Nian Liu ₂ , Zhenda Lu _{1,

3}

Affiliation

Solid polymer electrolytes for safe lithium batteries are in general flexible and easy to process, yet they have limited ionic conductivity and low mechanical strength. Introducing nano/microsized fillers into polymer electrolytes has been proven effective to address these issues, while formation of a percolated network of fillers for efficient Li⁺ conduction remains challenging. In this work, composite polymer electrolyte with 3D cellulose/ceramic networks is successfully developed using natural cellulose fibers and Li⁺-conducting ceramic nanoparticles. Monodisperse ceramic nanofillers first form interconnected networks driven by the self-assembly of hybrid cellulose fibers. The hierarchical cellulose skeleton provides spatial guidance for ceramic fillers and firmly supports the whole structure. After polymer electrolyte infusion, the resultant hybrid electrolyte affords both 3D continuous Li⁺ pathways for high Li⁺ conductivity and sufficient mechanical strength for dendrite suppression. This cellulose-confined particle percolation approach enables efficient and strong solid electrolytes for lithium batteries.

中文翻译：

沿着天然纤维素衍生的分层网络的三维渗透陶瓷纳米粒子，具有高Li +电导率和机械强度。

用于安全锂电池的固体聚合物电解质通常具有柔韧性，并且易于加工，但是离子电导率有限且机械强度较低。已证明将纳米/微米级填料引入聚合物电解质可有效解决这些问题，而形成渗滤的填料网络以实现有效的Li ⁺传导仍然具有挑战性。在这项工作中，使用天然纤维素纤维和Li ⁺成功开发了具有3D纤维素/陶瓷网络的复合聚合物电解质导电陶瓷纳米粒子。单分散陶瓷纳米填料首先形成由混合纤维素纤维自组装驱动的互连网络。分层纤维素骨架为陶瓷填料提供了空间导向，并牢固地支撑了整个结构。注入聚合物电解质后，所得混合电解质既可提供3D连续Li ⁺路径，以实现高Li ⁺电导率，又可提供足够的机械强度来抑制枝晶。这种限制纤维素的颗粒渗滤方法可为锂电池提供有效而坚固的固体电解质。

更新日期：2020-10-15

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