School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
The Key Laboratory of Material Processing and Mold of Ministry of Education, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Small. 2023 May;19(18):e2207496. doi: 10.1002/smll.202207496. Epub 2023 Feb 12.
It is extremely crucial to design and match high-quality cathode and anode for achieving high-performance asymmetric supercapacitors (ASCs). Herein, Co (PO ) @NiCo-LDH/Ni foam (CP@NCOH/NF) cathode with hierarchical morphology and graphene hydrogel/Fe-Ni phosphide/Ni foam (GH/FNP/NF) anode with the robust and porous structure are elaborately designed and prepared, respectively. Owing to their unique and profitable structures, both CP@NCOH/NF and GH/FNP/NF electrodes yield the superior capacity (10760 and 2236 mC cm at 2 mA cm , respectively), good rate capability (63% retention at 200 mA cm and 52% retention at 50 mA cm , respectively), and excellent cycling stability (72% and 74% retention after 10 000 cycles, respectively). Benefiting from their matchable electrochemical performances, the configured solid-state CP@NCOH/NF//GH/FNP/NF ASC outputs both competitive energy density (80.2 Wh kg /4.1 mWh cm ) and power density (14563 W kg /750 mW cm ), companied by remarkable cyclability (71% retention after 10 000 cycles), manifesting its great promise for large-scale integrated energy-storage system.
设计和匹配高质量的阴极和阳极对于实现高性能的不对称超级电容器（ASC）至关重要。在此，我们精心设计并制备了具有分级形貌的 Co（PO4）@NiCo-LDH/Ni 泡沫（CP@NCOH/NF）阴极和具有坚固多孔结构的石墨烯水凝胶/Fe-Ni 磷化物/Ni 泡沫（GH/FNP/NF）阳极。由于它们独特而有利的结构，CP@NCOH/NF 和 GH/FNP/NF 电极均表现出优异的容量（在 2 mA cm-2时分别为 10760 和 2236 mC cm-2）、良好的倍率性能（在 200 mA cm-2时保持 63%，在 50 mA cm-2时保持 52%）和出色的循环稳定性（分别经过 10000 次循环后保留 72%和 74%）。得益于它们可匹配的电化学性能，所配置的固态 CP@NCOH/NF//GH/FNP/NF ASC 输出了具有竞争力的能量密度（80.2 Wh kg-1/4.1 mWh cm-3）和功率密度（14563 W kg-1/750 mW cm-3），同时还具有出色的循环稳定性（经过 10000 次循环后保留 71%），这表明其在大规模集成储能系统中具有很大的应用潜力。
