Functional doping enables conjugated polymers (CPs) to be prevalent electrodes through enhancing the charge transport. However, conventional inactive dopants inevitably weight the electrode and block the access to the theoretical capacity. Herein, we demonstrate the versatile role of sodium anthraquinone-2-sulfonate (AQS) in boosting the charge storage of CPs as both redox dopant and electrolyte additive. Reversible faradic reactions are supplemented both in the bulk polymer and on the interfaces with electrolyte, resulting in battery-like energy storage. As a result, poly(3,4-ethylenedioxythiophene) (PEDOT) exhibits greatly improved specific capacity from 0.4 mAh cm^-2 (92.0 mAh g^-1) to 1.3 mAh cm^-2 (293.3 mAh g^-1), together with dramatically enhanced rate capability and cyclic stability. After 10000 galvanostatic charge/discharge (GCD) cycles, AQS doped PEDOT electrode shows a capacity retention of 82.4% in 1 M H₂SO₄ electrolyte and even 173.5% with 0.03 M AQS added in electrolyte. The solid-state hybrid supercapacitor delivers a maximum volumetric energy density of 12.1 mWh cm^-3 at a power density of 25.1 mW cm^-3, with a capacity retention of 89.0% after 10000 GCD cycles. Our work reveals the great potential of AQS as one-for-two solution to tackle CPs challenges in developing robust high-efficiency electrochemical energy storage.

功能性掺杂通过增强电荷传输，使共轭聚合物（CP）成为普遍的电极。然而，常规的惰性掺杂剂不可避免地给电极加重并阻碍了达到理论容量。在这里，我们证明了蒽醌-2-磺酸钠（AQS）在促进CPs作为氧化还原掺杂剂和电解质添加剂的电荷存储方面的多功能作用。可逆的法拉第反应在本体聚合物和与电解质的界面中均得到补充，从而产生了类似电池的能量存储。结果，聚（3,4-乙撑二氧噻吩）（PEDOT）的比容量大大提高，从0.4 mAh cm ^-2（92.0 mAh g ^-1）提高到1.3 mAh cm ^-2（293.3 mAh g ^-1）），以及显着增强的速率能力和循环稳定性。经过10000次恒流充电/放电（GCD）循环后，掺杂AQS的PEDOT电极在1 MH ₂ SO ₄电解液中的容量保持率为82.4％，在电解液中添加0.03 M AQS时，容量保持率为173.5％。固态混合超级电容器在25.1 mW cm ^-3的功率密度下提供的最大体积能量密度为12.1 mWh cm ^-3，在10000次GCD循环后，容量保留率为89.0％。我们的工作揭示了AQS的巨大潜力，可以作为一对二的解决方案来解决CP在开发强大的高效电化学储能方面的挑战。