文献类型：期刊文献

英文题名：Synergistic engineering of structure and interface in NiMn-LDH on hollow graphene spheres for high-performance flexible supercapacitors

作者：Jiang, Jinli[1];Luo, Yuancong[1];Wang, Xue[1];Liu, Zichuan[1];Cui, Shicong[3];Cheng, Lingli[1];Li, Zhen[1];Jiao, Zheng[2]

机构：[1]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[2]Shanghai Univ, Digital Med Res Inst, Sch Med, Shanghai 200444, Peoples R China;[3]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2025

卷号：1048

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20254719573194);WOS:【SCI-EXPANDED(收录号:WOS:001628962700011)】；

基金：This research was funded by the soft science project of Tianjin Science and Technology Program Project (No. 24YFZCSN00100) , 2024-2025 Research Project under the Open Competition Mechanism, School of Medicine, Shanghai University, Shanghai 200444, China (No. SHU-UM-JBGS-2025-11) , Shanghai Science and Technology Commission (No. 24692115200) , and National Natural Science Foundation of China (No. 12275171) .

语种：英文

外文关键词：NiMn LDH; Hollow graphene spheres; Heterointerface; Supercapacitor; Flexible energy storage

摘要：Conductive substrates for layered double hydroxides (LDHs) often suffer from limited surface area, insufficient anchoring sites, and high interfacial resistance, greatly restricting their electrochemical performance. To address this, we demonstrate a strategically designed heterostructure by in-situ growing NiMn-layered double hydroxide (LDH) nanosheets on three-dimensional reduced-graphene-oxide hollow spheres (rGO-HS). This unique NiMnLDH@rGO-HS architecture combines a conductive, mesoporous shell with an internal void space, endowing it with a high specific surface area (240.05 m2 g-1), rapid ion/electron transport capability, and effective buffering of volume changes during cycling. Importantly, XPS analysis confirms strong electronic coupling at the heterointerface, which facilitates charge redistribution and elevates the Ni and Mn valence states, thereby accelerating the Faradaic reaction kinetics. Benefiting from this structural and interfacial synergy, the electrode achieves a remarkable specific capacitance of 2160 F g-1 at 0.5 A g-1 , a low charge-transfer resistance of 1.49 Omega, and outstanding cycling stability with 85.8 % capacitance retention after 5000 cycles. When configured into an allsolid-state asymmetric supercapacitor, the device delivers a high energy density of 49.5 Wh kg-1 and exhibits robust mechanical flexibility, maintaining stable performance under repeated bending. This work establishes the rGO-HS scaffold as a versatile platform for developing high-performance flexible energy storage devices, offering valuable insights for future material design.