Biomass-derived porous carbon materials stimulate considerable research interest owing to the abundant resources, low cost, eco-friendliness and effective applications in electrochemical energy storage. Herein, N/S/O-doped honeycomb-like porous carbon materials are successfully controlled prepared from green bristlegrass seeds by one-step carbonization with assistance of gelatinization treatment. Benefitting from their three-dimensional interconnected honeycomb-like hierarchical porous architecture together with high specific surface area and multi-heteroatom doping, the as-synthesized carbon materials exhibit high specific capacitance of 391 F g⁻¹ at a current density of 0.5 A g⁻¹ with good rate capability (67.8% capacitance retention at 50 A g⁻¹) in 6 M KOH and outstanding cycling stability with a capacitance retention of 97.2% over 10000 cycles. Meanwhile, the symmetric supercapacitor device in 1 M Na₂SO₄ aqueous electrolyte is able to deliver a high energy density of 20.15 Wh kg⁻¹ at a power density of 500 W kg⁻¹ with a wide voltage window of 2.0 V. More impressively, it still retains a high energy density of 15.56 Wh kg⁻¹ even at 20 kW kg⁻¹. In addition, the supercapacitor device also shows superior cycling performance with a 94.2% capacitance retention for 10000 cycles.

由于生物质来源的多孔碳材料资源丰富，成本低廉，生态友好以及在电化学储能方面的有效应用，因此引起了广泛的研究兴趣。在此，通过绿化刚毛草种子通过胶凝处理的一步碳化成功地控制了N / S / O掺杂的蜂窝状多孔碳材料。从受益它们的三维互连的蜂窝样具有高比表面积和多杂原子掺杂一起分级多孔结构，所合成的碳材料表现出的391 F G高的比电容^-1 以0.5 g的电流密度^{- 1}具有良好的速率能力（50 A g ^-1时的电容保持率为67.8％）在6 M KOH中，具有出色的循环稳定性，在10000次循环中的电容保持率为97.2％。同时，在1 M Na ₂ SO ₄水性电解质中的对称超级电容器装置能够以 500 W kg ^-1的功率密度和2.0 V的宽电压窗口提供20.15 Wh kg ^-1的高能量密度。 ，即使在20 kW kg ^-1时，它仍保持15.56 Wh kg ^-1的高能量密度。此外，超级电容器器件还具有卓越的循环性能，在10000次循环中的电容保持率为94.2％。