3D printed hierarchically-porous microlattice electrode materials for exceptionally high specific capacity and areal capacity lithium ion batteries
3D printed hierarchically-porous microlattice electrode materials for exceptionally high specific capacity and areal capacity lithium ion batteries
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DOI：
10.1016/j.addma.2018.07.006
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发表时间：
2018-10
影响因子：
11
通讯作者：
M. S. Saleh;Jie Li;Jonghyun Park;R. Panat
中科院分区：
文献类型：
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作者：
M. S. Saleh;Jie Li;Jonghyun Park;R. Panat
尽管增材制造在制造三维电池电极方面具有巨大的潜力，但由于制造工艺的性质，通过该技术实现的结构主要限于交叉几何形状。这项工作报告了3D电池的重大进展，通过3D打印实现了具有晶格结构和分层孔隙度的高度复杂和可控的3D电极结构。采用气溶胶喷射3D打印技术制造多孔固体桁架构件（Ag）的微晶格电极，与薄固体Ag块电极相比，电池性能得到了前所未有的改善，如比容量增加400%，面积容量增加100%，电极体积利用率高。此外，微晶格电极在40次电化学循环后仍保持其形态，证明了其机械稳健性。结果表明，具有分层孔隙度的三维微晶格结构增强了电解质通过电极体积的传输，增加了电化学反应的可用表面积，减轻了插层引起的应力；从而形成一个非常强大的高容量电池系统。在这项工作中提出的结果可以为提高广泛的电化学储能系统的性能提供新的途径。
Despite the enormous potential of additive manufacturing in fabricating three-dimensional battery electrodes, the structures realized through this technology are mainly limited to the interdigitated geometries due to the nature of the manufacturing process. This work reports a major advance in 3D batteries, where highly complex and controlled 3D electrode architectures with a lattice structure and a hierarchical porosity are realized by 3D printing. Microlattice electrodes with porous solid truss members (Ag) are fabricated by Aerosol Jet 3D printing that leads to an unprecedented improvement in the battery performance such as 400% increase in specific capacity, 100% increase in areal capacity, and a high electrode volume utilization when compared to a thin solid Ag block electrode. Further, the microlattice electrodes retain their morphologies after 40 electrochemical cycles, demonstrating their mechanical robustness. These results indicate that the 3D microlattice structure with a hierarchical porosity enhances the electrolyte transport through the electrode volume, increases the available surface area for electrochemical reaction, and relieves the intercalation-induced stress; leading to an extremely robust high capacity battery system. Results presented in this work can lead to new avenues for improving the performance of a wide range of electrochemical energy storage systems.