Hydrogen ion battery is a promising energy storage device due to its advantages of non-pollution, excellent rate capability and feasibility at low temperature. Herein, we assemble a novel rechargeable hydrogen ion supercapattery with the iodine-absorbed carbon paper doped with N and P (I₂-NP-CP) as the cathode electrode and molybdenum trioxide as the anode electrode. Typically, the I₂-NP-CP electrode shows the superior rate capability from 1 A g⁻¹ (174.7 mAh g⁻¹, 483.8 F g⁻¹) to 20 A g⁻¹ (111.1 mAh g⁻¹, 307.7 F g⁻¹), mainly ascribed to the strong interaction between iodine and the NP-CP substrate. Furthermore, electrochemical measurement of the I₂-NP-CP@Nafion//MoO₃ supercapattery manifests that the electrodes exhibit excellent cycling stability, retaining 124.3 mAh g⁻¹ after 500 cycles at 15 A g⁻¹, accounting for 93.2 % of the initial capacity. Although some IO₃⁻ dissolves in the electrolyte due to the weak chemical interaction between IO₃⁻ and NP-CP, and cannot be completely reduced to I⁻ during discharge process, it can be improved by modification of electrode with Nafion resin to further better the cycling stability. The excellent electrochemical properties in this study show the possibility for the development of novel rechargeable hydrogen ion supercapattery system.

氢离子电池具有无污染、倍率性能好、低温可行性等优点，是一种很有前景的储能装置。在此，我们组装了一种新型的可充电氢离子超级电容器，其中掺杂有 N 和 P 的吸碘碳纸（I ₂ -NP-CP）作为阴极，三氧化钼作为阳极。通常，I ₂ -NP-CP 电极显示出从 1 A g ^-1 (174.7 mAh g ^-1 , 483.8 F g ^-1 ) 到 20 A g ^-1 (111.1 mAh g ^-1 , 307.7 F g ⁻¹)，主要归因于碘与 NP-CP 底物之间的强相互作用。此外，I的电化学测量₂ -NP-CP @的Nafion //的MoO ₃ supercapattery舱单，电极显示出优异的循环稳定性，保留124.3毫安克^-1后在15 A G 500个循环^-1，占的93.2％初始容量。尽管由于IO ₃ ^-和NP-CP之间的弱化学相互作用，一些IO ₃ ^-溶解在电解质中，并且不能完全还原为I ^-在放电过程中，可以通过Nafion树脂对电极进行改性，进一步提高循环稳定性。本研究中优异的电化学性能显示了开发新型可充电氢离子超级电池系统的可能性。