Stabilization of tetragonal copper ferrite super-architectures have been proposed for the fabrication of high-performance supercapacitor and water splitting electrodes. The reaction parameters are optimized to keep the tetragonal phase intact (with high yield per batch ∼7.5 g) in order to have better ions intercalation/de-intercalation processes and longer cycling stability, according to Jahn-Teller distortion theory. The developed porous layered architectures are mesoporous with large specific surface area for ionic interactions. The redox additive insertion in the electrolyte raises the specific capacity to ∼450 mAh g^-1 (∼2490 F g^-1) from the fabricated electrode. The physical mechanism involved behind the electrochemical performance in presence of redox additives is elaborately discussed to gain insight into the charge storage characteristics. The fabricated asymmetric solid-state supercapacitor exhibits broad potential window (∼1.8 V) with excellent energy (128 Wh kg^-1) cum power traits, and a long-lasting stable performance for >10000 cycles. For water splitting, the super-architectures based electrode displays promising lower OER/HER (∼298/103 mV) overpotentials and stability over longer durations (>30 h). The fabricated symmetric device with the alkaline electrolyte is highly stable with cell voltage of 1.62 V, which being an oxide material is excellent and superior to various oxides/chalcogenides based high-grade materials.

已经提出了用于制造高性能超级电容器和水分解电极的四方铜铁氧体超级体系结构的稳定化方法。根据Jahn-Teller畸变理论，对反应参数进行了优化，以保持四方相完整（每批收率较高，约为7.5 g），从而具有更好的离子嵌入/脱嵌过程和更长的循环稳定性。所开发的多孔层状结构是介孔的，具有比表面积大的离子相互作用。电解质中氧化还原添加剂的插入将比容量提高至〜450 mAh g ^-1（〜2490 F g ^-1）的电极。详细讨论了在氧化还原添加剂存在下电化学性能背后的物理机制，以深入了解电荷存储特性。所制造的非对称固态超级电容器具有宽的电位窗口（〜1.8 V），具有出色的能量（128 Wh kg ^-1）和功率特性，并且在> 10000次循环中具有长期稳定的性能。对于水分解，基于超体系结构的电极显示出较低的OER / HER（〜298/103 mV）过电势，并在较长的持续时间（> 30 h）内具有稳定性。用碱性电解质制成的对称器件在电池电压为1.62 V的情况下具有很高的稳定性，它是一种氧化物材料，性能优异，优于各种基于氧化物/硫属化物的高级材料。