Efficient pseudocapacitive energy storage devices have attracted considerable attention due to the growing demand of electrical power supply. Still, the design and fabrication of electrode materials with high power and energy densities is challengeable. Herein, an in-situ reduction and competitive cross-linking strategy is presented to construct a novel Sn–Mo bimetallic oxide nanoparticle-grown on P-doped hierarchical porous carbon (SnMo–O@P-HPC). The attractive electrochemical performance of SnMo–O@P-HPC composite with an ultrahigh specific capacitance of 2121.3 F g⁻¹ and excellent cycle stability of 92.5% over 5000 cycles is resulted from unique active component, abundant active sites, and well-organized 3D porous structure. An asymmetric supercapacitor composed of activated carbon and SnMo–O@P-HPC displays an amazing specific energy density of 114.9 W h kg⁻¹ at 515.5 and 98.8 W h kg⁻¹ even at 20,900 W kg⁻¹. Importantly, it also displays a wonderful stability with excellent capacitance retention of 92.5% after 5000 cycles. The work will provide an effective and novel method to obtain the promising electrode materials for supercapacitors.

由于对电力供应的需求不断增长，高效的伪电容储能装置已引起了广泛的关注。但是，具有高功率和能量密度的电极材料的设计和制造仍然具有挑战性。在此，提出了一种原位还原和竞争性交联策略，以构建在P掺杂分层多孔碳（SnMo-O @ P-HPC）上生长的新型Sn-Mo双金属氧化物纳米颗粒。具有2121.3 F g ^-1超高比电容的SnMo–O @ P-HPC复合材料的诱人电化学性能独特的活性成分，丰富的活性位点和组织良好的3D多孔结构，可在5000个循环中实现92.5％的出色循环稳定性。活性炭和SnMo-O @ P-HPC显示组成114.9 W时公斤的一个惊人的比能量密度的非对称超电容器^-1在515.5和98.8 W时千克^-1甚至在20900公斤w ^ ^-1。重要的是，它还具有出色的稳定性，在5000次循环后仍具有92.5％的出色电容保持率。这项工作将提供一种有效而新颖的方法来获得有希望的超级电容器电极材料。