Chalcogens undergoing positive valence conversions show great potential to achieve a high discharge voltage in batteries; however, such reactions with high reversibility are difficult to achieve because element O/S/Se are inherently electron acceptors. Herein, by incorporating the chalcogens with the unique triphenylphosphine-based structure (strong electron-withdrawing groups), a high-potential triphenylphosphine selenide organic cathode (TP-Se) is developed. Facilitated by a Zn²⁺/trifluoromethanesulfonate (OTF⁻) hosting mechanism, the (TP-Se)⁻ to (TP-Se)⁰ to (TP-Se)⁺ conversion is realized. The dual-ion Zn‖TP-Se batteries exhibit a flat discharge plateau at 1.96 V and a superior discharge capacity. Benefiting from the stable triphenylphosphine molecular structures and optimized hybrid electrolytes, excellent cycling performance is also attained (up to 85.3% capacity retention after 4,300 cycles). Moreover, the Zn‖TP-Se battery also delivers a remarkable rate performance. The system is attractive due to its high discharge voltage, which is higher than ever reported for organic cathodes of zinc batteries.

经历正价转换的硫族元素显示出在电池中实现高放电电压的巨大潜力；然而，这种具有高可逆性的反应很难实现，因为元素 O/S/Se 本质上是电子受体。在此，通过结合具有独特三苯基膦基结构（强吸电子基团）的硫属元素，开发了一种高电位硒化三苯基膦有机正极（TP-Se）。在 Zn ²⁺ /三氟甲磺酸盐 (OTF ^- ) 承载机制的促进下，(TP-Se) ^-到 (TP-Se) ⁰到 (TP-Se) ⁺实现了转换。双离子 Zn‖TP-Se 电池在 1.96 V 时表现出平坦的放电平台和优异的放电容量。得益于稳定的三苯基膦分子结构和优化的混合电解质，还获得了优异的循环性能（4,300 次循环后容量保持率高达 85.3%）。此外，Zn‖TP-Se电池也提供了卓越的倍率性能。该系统因其高放电电压而具有吸引力，该电压比以往报道的锌电池有机阴极要高。