A Composite Electrode Film of 3D Lamellar Spherical Co‐Doped MoS ₂ @10A‐BDC for High‐Energy‐Density Supercapacitors

The structural design of electrode materials is an effective strategy for the improvement of the performance of energy storage devices. Hence, a 3D lamellar spherical electrode film of bamboo‐derived carbon (BDC)/Co‐doped MoS 2 (Co‐doped MoS 2 @10A‐BDC) is synthesized via a two‐step method in this work. Remarkably, the Co‐doped MoS 2 @10A‐BDC displays a specific capacitance of 1070 F g −1 at 1.0 A g −1 . To further evaluate practical applicability of Co‐doped MoS 2 @10A‐BDC, a supercapacitor device (Co‐doped MoS 2 @10A‐BDC//10A‐BDC) is assembled achieves an energy density of 101.8 Wh kg −1 at 800 W kg −1 , and the capacity retention rate remains as high as 89.1% after 8000 cycles. To summarize, this work successfully synthesizes high‐capacitance and high‐energy‐density electrode materials using hydrothermal synthesis.