The fabrication of 3D complex shapes of porous tungsten carbide (WC) using an origami‐inspired manufacturing technology is presented. This is the first report of this technology for the fabrication of complex WC structures with density as low as 0.06 g cm⁻³. The porous WC origami structures are fabricated by heat treatment of folded paper infiltrated with an aqueous solution of ammonium metatungstate (AMT). WC purity up to 96% is achieved when using an AMT concentration of 20%, synthesis temperature of 1300 °C, and heating rate of 2.5 °C min⁻¹. The as‐synthesized WC features a Brunauer–Emmett–Teller (BET) surface area of 102.06 m² g⁻¹. Beyond obtaining high‐purity WC, the focus is on understanding the effect of the microstructure on the mechanical performance of origami structures. Increasing the purity of WC decreases the elastic modulus and compressive strength of the origami structure, which is attributed to the increasing grain size of the crystalline phase materials and increase of graphitic phases in carbon with increasing temperature. Furthermore, the WC origami structures exhibit good and stable electrical conductivity under compressive stress. These initial results encourage further work on using paper as a scaffold to fabricate origami‐inspired multifunctional structures, for structural energy components.

中文翻译：

---

使用折纸技术设计的碳化钨电极

介绍了使用折纸启发的制造技术制造多孔碳化钨（WC）的3D复杂形状。这是该技术用于制造密度低至0.06 g cm ^-3的复杂WC结构的第一份报告。多孔WC折纸结构是通过对浸有偏钨酸铵（AMT）水溶液的折叠纸进行热处理而制成的。当使用20％的AMT浓度，1300°C的合成温度和2.5°C min ^-1的加热速率时，WC纯度可达到96％。合成后的WC具有102.06 m ²  g ^-1的Brunauer-Emmett-Teller（BET）表面积。除了获得高纯度的碳化钨外，重点还在于了解微观结构对折纸结构力学性能的影响。WC纯度的提高会降低折纸结构的弹性模量和抗压强度，这是由于结晶相材料的晶粒尺寸增加以及碳中石墨相随温度升高而增加所致。此外，WC折纸结构在压应力下表现出良好且稳定的导电性。这些初步结果鼓励人们进一步开展工作，以纸作为支架来制造折纸风格的多功能结构，以用作结构能组件。