Chen Zhiqi, Chao Yunfeng, Sayyar Sepidar, Tian Tongfei, Wang Kezhong, Xu Yeqing, Wallace Gordon, Ding Jie, Wang Caiyun
ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong, Wollongong, NSW, 2500, Australia.
Australian National Fabrication Facility - Materials Node, Innovation Campus, University of Wollongong, Wollongong, NSW, 2500, Australia.
Adv Sci (Weinh). 2023 Oct;10(28):e2302844. doi: 10.1002/advs.202302844. Epub 2023 Aug 6.
The development of shear thickening electrolytes is proving to be pivotal in the quest for impact resistant lithium-ion batteries (LIBs). However, the high viscosity and poor stability associated with the need for high filler content has to date impeded progress. Here, this work reports a new type of polymer-bridged shear thickening electrolyte that overcomes these shortcomings, by utilizing the interaction between polymer chains and silica nanoparticles. The incorporation of polyethylene oxide (PEO) facilitates hydrocluster formation providing impact resistance with a filler content as low as 2.2 wt%. This low viscosity electrolyte has a high ionic conductivity of ≈5.1 mS cm with excellent long-term stability, over 30 days. The effectiveness of this electrolyte in LIBs is demonstrated by excellent electrochemical performance and high impact resistance.
事实证明，剪切增稠电解质的开发对于寻求抗冲击锂离子电池（LIB）至关重要。然而，迄今为止，与高填料含量需求相关的高粘度和稳定性差阻碍了进展。在此，这项工作报道了一种新型的聚合物桥接剪切增稠电解质，该电解质通过利用聚合物链与二氧化硅纳米颗粒之间的相互作用克服了这些缺点。聚环氧乙烷（PEO）的加入促进了水簇的形成，在填料含量低至2.2 wt%时提供抗冲击性。这种低粘度电解质具有约5.1 mS cm的高离子电导率，具有超过30天的优异长期稳定性。这种电解质在LIB中的有效性通过优异的电化学性能和高抗冲击性得到了证明。
