Extrusion-Based 3D Printing of Hierarchically Porous Advanced Battery Electrodes
Extrusion-Based 3D Printing of Hierarchically Porous Advanced Battery Electrodes
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DOI：
10.1002/adma.201705651
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发表时间：
2018-03-22
影响因子：
29.4
通讯作者：
Hu, Liangbing
中科院分区：
文献类型：
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作者：
Lacey, Steven D.;Kirsch, Dylan J.;Hu, Liangbing
一种高度多孔的2D纳米材料，多孔氧化石墨烯（hGO），直接由多孔石墨烯粉末合成，并用于在不使用添加剂或粘合剂的情况下创建水性3D可打印墨水。可以容易地实现亲水性hGO片在水中的稳定分散体（约100 mg/mL（-1））。水性hGO油墨的剪切稀化行为使得能够在任意基底上将细丝基于挤出印刷成复杂的3D架构，例如堆叠的网格结构。独立式3D打印的hGO网片表现出三峰孔隙率：纳米级（hGO片上的4-25 nm通孔）、微米级（通过冻干引入的数十微米尺寸的孔）和宏观级（
A highly porous 2D nanomaterial, holey graphene oxide (hGO), is synthesized directly from holey graphene powder and employed to create an aqueous 3D printable ink without the use of additives or binders. Stable dispersions of hydrophilic hGO sheets in water (approximate to 100 mg mL(-1)) can be readily achieved. The shear-thinning behavior of the aqueous hGO ink enables extrusion-based printing of fine filaments into complex 3D architectures, such as stacked mesh structures, on arbitrary substrates. The freestanding 3D printed hGO meshes exhibit trimodal porosity: nanoscale (4-25 nm through-holes on hGO sheets), microscale (tens of micrometer-sized pores introduced by lyophilization), and macroscale (