Stable quasi-solid-state lithium-organic batteries (QSSLOBs) have received widespread attention due to their high energy density, nonflammability, and environmental friendliness. However, the undesirable interfacial compatibility between the organic cathode and polymer electrolytes (PEs) usually results in unsatisfactory performance. Herein, two types of optimized PEs (gel-based PEs, GPEs, and eutectic-based PEs, EPEs) are fabricated and matched with small-molecule quinone (2,3,5,6-tetraaminobenzoquinone, TABQ, and 1,4-benzoquinone, BQ) cathode materials. Benefiting from the heteroatom groups (−NH₂) enhancing the cathode–electrolyte interface compatibility, TABQ shows higher electrochemical performance (310.4 mAh g^–1 at 50 mA g^–1 for the GPE system and 312.6 mAh g^–1 at 50 mA g^–1 for the EPE system) than its analogue BQ. Additionally, theoretical calculations and detailed electrochemical characterizations confirm the positive effect of the enhanced interface compatibility between TABQ and PEs on the electrochemical properties and also reveal the charge storage mechanism of TABQ. These results show that this strategy of constructing interface compatibility could create a new chapter for the preparation of high-performance QSSLOBs.

中文翻译：

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设计小分子醌阴极的界面兼容性以获得稳定的准固态锂有机电池


稳定的准固态锂有机电池（QSSLOB）由于其能量密度高、不易燃、环境友好等优点而受到广泛关注。然而，有机阴极和聚合物电解质（PE）之间不良的界面相容性通常会导致性能不令人满意。在此，制备了两种类型的优化 PE（凝胶基 PE，GPE 和共晶基 PE，EPE），并与小分子醌（2,3,5,6-四氨基苯醌，TABQ 和 1,4-苯醌，BQ）正极材料。受益于杂原子基团 (−NH ₂ ) 增强了正极-电解质界面相容性，TABQ 显示出更高的电化学性能（50 mA g ^–1 > 对于 GPE 系统，对于 EPE 系统，在 50 mA g ^–1 时为 312.6 mAh g ^–1 ））与其模拟 BQ 相比。此外，理论计算和详细的电化学表征证实了TABQ和PE之间增强的界面相容性对电化学性能的积极影响，并揭示了TABQ的电荷存储机制。这些结果表明，这种构建接口兼容性的策略可以为高性能QSSLOB的制备开创新的篇章。