Maria Lucas, Renato Gonçalves, Tanja Kallio, Sara Pakseresht, Filipp Obrezkov, Stéphane Clain, Maria T. Malheiro, Senentxu Lanceros-Mendez and Carlos M. Costa*,
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The physical, morphological, and electrochemical characteristics of the SPEs were studied. The addition of ceramic particles and ionic liquids does not affect the morphology, which remains a compact morphology. In the same way, the degree of crystallinity, polymer phase, and thermal properties of the SPE remain similar to the pristine polymer after filler addition. The inclusion of both ceramic particles and the ionic liquid allowed improvement of battery performance. Ionic conductivity in the order of 2.41 × 10<sup>–5</sup> S cm<sup>–1</sup> was achieved, accompanied by a battery capacity performance very close to theoretical values. Battery performance with PVDF-HFP/BST/IL (153 mAh g<sup>–1</sup>) and PVDF-HFP/BTO/IL (148.2 mAh g<sup>–1</sup>) composites proved to be successful in long-life cycling, bearing a higher capacity and stability compared to PVDF-HFP/IL (121.3 mAh g<sup>–1</sup>). When varying C rates were applied, the PVDF-HFP/BST/IL sample presented superior results, revealing higher stability when compared to the other SPE samples. In conclusion, the fine-tuning of the ceramic particle type within SPE formulations offers an avenue for battery performance optimization. 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引用次数: 0
摘要
这项工作介绍了用于下一代固态电池的固体聚合物电解质（spe）的发展。基于聚合物基体（聚偏氟乙烯）-共六氟丙烯（PVDF-HFP），掺杂16 wt %的陶瓷颗粒（钛酸钡氧化物（BTO）、钛酸钡锶（BST）和钛酸锆铅（PZT））和40 wt %的离子液体（IL, [PMPyr][TFSI]），制备了固体聚合物电解质。离子液体可以改善体系的离子电导率，而陶瓷颗粒的加入则可以提高体系的机械强度和热稳定性。研究了SPEs的物理、形态和电化学特性。陶瓷颗粒和离子液体的加入不影响其形貌，仍保持致密的形貌。同样，加入填料后，SPE的结晶度、聚合物相和热性能与原始聚合物相似。同时加入陶瓷颗粒和离子液体可以提高电池的性能。离子电导率达到2.41 × 10-5 S cm-1，电池容量性能非常接近理论值。与PVDF-HFP/IL （121.3 mAh g-1）相比，PVDF-HFP/BST/IL （153 mAh g-1）和PVDF-HFP/BTO/IL （148.2 mAh g-1）复合材料的电池性能在长寿命循环方面取得了成功，具有更高的容量和稳定性。当应用不同的C率时，PVDF-HFP/BST/IL样品表现出更好的结果，与其他SPE样品相比，显示出更高的稳定性。综上所述，SPE配方中陶瓷颗粒类型的微调为电池性能优化提供了一条途径。特别是，在混合SPE复合材料中加入BST可以改善电池循环稳定性。
Room-Temperature Hybrid Solid Polymer Electrolytes Incorporating Poly(vinylidene fluoride-co-hexafluoropropylene), Ionic Liquids, and Ceramic Particles for Solid-State Batteries
This work presents the development of solid polymer electrolytes (SPEs) for next-generation solid-state batteries. Solid polymer electrolytes were prepared based on a polymer matrix (poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP)) doped with 16 wt % ceramic particles (barium titanate oxide (BTO), barium strontium titanate (BST), and lead zirconate titanate (PZT)) and an ionic liquid (IL, [PMPyr][TFSI]) at 40 wt %. The ionic liquid allows improvement of the ionic conductivity of the system, whereas the ceramic particles are included to enhance the mechanical strength and thermal stability of the system. The physical, morphological, and electrochemical characteristics of the SPEs were studied. The addition of ceramic particles and ionic liquids does not affect the morphology, which remains a compact morphology. In the same way, the degree of crystallinity, polymer phase, and thermal properties of the SPE remain similar to the pristine polymer after filler addition. The inclusion of both ceramic particles and the ionic liquid allowed improvement of battery performance. Ionic conductivity in the order of 2.41 × 10–5 S cm–1 was achieved, accompanied by a battery capacity performance very close to theoretical values. Battery performance with PVDF-HFP/BST/IL (153 mAh g–1) and PVDF-HFP/BTO/IL (148.2 mAh g–1) composites proved to be successful in long-life cycling, bearing a higher capacity and stability compared to PVDF-HFP/IL (121.3 mAh g–1). When varying C rates were applied, the PVDF-HFP/BST/IL sample presented superior results, revealing higher stability when compared to the other SPE samples. In conclusion, the fine-tuning of the ceramic particle type within SPE formulations offers an avenue for battery performance optimization. In particular, the inclusion of BST in the hybrid SPE composite allows improvement of battery cycling stability.
期刊介绍：
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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