Metal–organic frameworks (MOFs) are regarded as promising cathode materials for rechargeable Li and Na batteries, but suffering from low energy density and high cost. Herein, we have successfully synthesized a novel and low-cost MOF based on the coordination between Fe³⁺ and 2,5-dihydroxybenzoquinone (DHBQ) ligand, namely Fe₂(DHBQ)₃. Compared to its analogues, the rational structure provides it with much higher average discharge voltage (2.43 V vs. Li⁺/Li) and reversible capacity (285 mAh g^–1), leading to the highest Li-storage energy density (693 Wh kg^–1) among all MOF-type cathodes. Besides, Fe₂(DHBQ)₃ also exhibits outstanding electronic conductivity (1.1 × 10^–4 S cm^–1), rate capability (57% @ 5000 mA g^–1), and long-term cycling stability (90% @ 1000^th cycle), as well as good applicability to practical test conditions and Na batteries. Moreover, the redox reaction and electrode evolution mechanisms were clearly investigated, providing significant insights in this field.

金属有机框架（MOFs）被认为是可充电锂和钠电池的有前途的正极材料，但存在能量密度低和成本高等问题。^{在此，我们成功合成了一种基于Fe 3+}和2,5-二羟基苯醌（DHBQ）配体的新型低成本MOF ，即Fe ₂ (DHBQ) ₃。与其类似物相比，合理的结构为其提供了更高的平均放电电压（2.43 V vs. Li ⁺ /Li）和可逆容量（285 mAh g ^–1），从而实现了最高的锂存储能量密度（693 Wh kg ^–1 ) 在所有 MOF 型阴极中。此外，Fe ₂ (DHBQ) ₃还具有出色的电子电导率 (1.1 × 10 ^–4 S cm ^–1 )、倍率性能 (57% @ 5000 mA g ^–1 ) 和长期循环稳定性 (90% @ 1000^次循环)，以及良好的适用性实际测试条件和钠电池。此外，还清楚地研究了氧化还原反应和电极演化机制，为该领域提供了重要的见解。