Development of a high particle loading novel copper ink for the fabrication of a three-dimensional hierarchical porous structure using direct ink writing and sintering

IF 2.5 4区 材料科学 Q2 CHEMISTRY, APPLIED Journal of Porous Materials Pub Date : 2024-04-03 DOI:10.1007/s10934-024-01579-8
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Abstract

Recently, the direct ink writing (DIW) of hierarchical porous copper \((Cu)\) (HP- \({\text{Cu}}\) ) for lithium metal battery applications has attracted significant attention. To achieve this, \(Cu\) ink with ideal rheological properties and high particle loading is necessary. However, to date, no work focusing on systematic \(Cu\) ink development with \(Cu\) particle loading more than 95 \(wt\%\) has been reported. Hence, in the present work, a novel \(Cu\) ink with a particle loading of more than 95 \(wt\%,\) and polylactic acid (PLA) as a binder has been developed. The rheological behavior of the \(Cu\) ink with different amounts of \(Cu\) loading i.e. 93, 95 and 97 \(wt\%\) respectively were investigated. Moreover, the modelling using the Herschel-Bulkey equation was done to establish the rheology. All the prepared inks showed viscoelastic and shear thinning behaviour. Moreover, the ink having 97 \(wt\%\) \(Cu\) loading exhibited optimum rheology with a shear elastic modulus of around \({10}^{5} Pa\) in the linear viscoelastic area. Subsequently, DIW using the prepared \(Cu\) inks followed by sintering was performed. The morphological study of the 3D printed \(Cu\) green samples and sintered samples was performed and it was found that the variation in \(Cu\) particle loading significantly affected the density and volumetric shrinkage. Finally, an HP- \({\text{Cu}}\) sample having a pore size less than 200 \(\mu m\) was fabricated using DIW and sintering to validate the efficacy of the developed \(Cu\) ink. Proper interparticle bonding between the \(Cu\) particles was observed indicating that the developed ink is suitable for the fabrication of complex \(Cu\) parts for lithium metal battery application.

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利用直接墨水书写和烧结技术开发用于制造三维分层多孔结构的高颗粒负载新型铜墨水
摘要 最近,用于锂金属电池应用的分层多孔铜(HP- \ ({\text{Cu}}\))直接油墨书写(DIW)引起了人们的极大关注。要实现这一目标,需要具有理想流变特性和高颗粒负载的(Cu)油墨。然而,迄今为止,还没有关于系统地开发含铜颗粒量超过 95 (wt\%)的(Cu)油墨的报道。因此,在本研究中,开发了一种颗粒负载量超过 95 (wt\%,)的新型(Cu)油墨,并使用聚乳酸(PLA)作为粘合剂。研究了不同含铜量(分别为 93、95 和 97)的油墨的流变行为。此外,还使用 Herschel-Bulkey 方程建立了流变模型。所有制备的油墨都表现出粘弹性和剪切稀化行为。此外,具有 97 \(wt\%\) \(Cu\) 负载的油墨表现出最佳的流变性,在线性粘弹性区域的剪切弹性模量约为\({10}^{5} Pa\) 。随后,使用制备好的(Cu)油墨进行 DIW,然后烧结。对三维打印的(Cu)绿色样品和烧结样品进行了形态学研究,发现(Cu)颗粒负载量的变化会显著影响密度和体积收缩率。最后,使用 DIW 和烧结技术制作了孔径小于 200 英寸的 HP- ({text{Cu}}\)样品,以验证所开发的(Cu)油墨的功效。观察到了(Cu)颗粒之间适当的颗粒间结合,这表明所开发的油墨适用于制造用于锂金属电池的复杂(Cu)部件。
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来源期刊
Journal of Porous Materials
Journal of Porous Materials 工程技术-材料科学:综合
CiteScore
4.80
自引率
7.70%
发文量
203
审稿时长
2.6 months
期刊介绍: The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.
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