The free-standing three dimensional (3D) hollow graphene foam (HGF) decorated nanostructured pseudocapacitive materials could offer a large active surface area and a extreme conductive porous 3D network for fast reversible charge transfer reactions in the supercapacitor. Herein, the 3D HGF was prepred by a template assisted-chemical vapor deposition (TA-CVD) method and the monoclinic WO₃ (m-WO₃) interconnected nanoparticles as well as 2D Ti₃C₂T_x sheets were bilaterally loaded on the inner and outer sides of HGF by a simple unipolar electrodeposition (UPED) method and a drop casting method, respectively. The obtained 3D free-standing m-WO₃/Ti₃C₂T_X/HGF electrode exhibited an excellent specific capacitance of 573 F g-¹ at 5 mV s-¹ with outstanding rate performance and 93.3 % cycling stability over 5000 cycles, which can be attributed to the metal-like conductivity and reversible redox reactions of hydrophilic 2D Ti₃C₂T_x. The asymmetric solid-state supercapacitor (ASC) illustrated a 2-fold wider potential of 1.4 V in an acidic electrolyte when compared with the MXene-based symmetric supercapacitor. It displayed an excellent specific capacitance of 145.2 F g⁻¹ (111.3 mF cm⁻²) at 5 mV s⁻¹, an ultra-high energy density of 27.2 Wh kg⁻¹ (20.83 μWh cm⁻²) at a power density of 752 W kg⁻¹ along with 93 % cycling stability over 10000 cycles. Therefore, such a m-WO₃/Ti₃C₂T_x/HGF electrode should be promising for the fabrication of advanced supercapacitors.

自支撑的三维（3D）中空石墨烯泡沫（HGF）装饰的纳米结构假电容材料可提供较大的活性表面积和极导电的多孔3D网络，以在超级电容器中进行快速可逆的电荷转移反应。在此，通过模板辅助化学气相沉积（TA-CVD）方法制备3D HGF，并将单斜晶WO ₃（m- WO ₃）互连的纳米颗粒以及2D Ti ₃ C ₂ T _x片材双向加载到硅片上。通过简单的单极电沉积（UPED）方法和滴铸法分别在HGF的内侧和外侧。获得的3D独立式m- WO ₃/ Ti ₃ C ₂ T _X / HGF电极在5 mV s- ^1时具有573 F g- ¹的优异比电容，具有出色的速率性能和5000次循环中93.3％的循环稳定性，这可归因于类金属的电导率亲水性2D Ti ₃ C ₂ T _x的可逆和可逆氧化还原反应。与基于MXene的对称超级电容器相比，该不对称固态超级电容器（ASC）在酸性电解质中显示出1.4伏的2倍宽电位。在5 mV s ^-1时显示出145.2 F g ^-1（111.3 mF cm ^-2）的出色比电容，在752 W kg ^-1的功率密度下具有27.2 Wh kg ^-1（20.83μWhcm ^-2）的超高能量密度，在10000次循环中具有93％的循环稳定性。因此，这种m- WO ₃ / Ti ₃ C ₂ T _x / HGF电极对于制造高级超级电容器应该是有前途的。