Mn3O4 nanoflakes/rGO composites with moderate pore size and (O=)C-O-Mn bond for enhanced supercapacitor performance

Over-Reduction-Controlled Mixed-Valent Manganese Oxide with Tunable Mn2+/Mn3+ Ratio for High-Performance Asymmetric Supercapacitor with Enhanced Cycling Stability

“…The stability of these electrode materials was tested at 1 A g –1 for 10 000 continuous charge–discharge cycles (Figure f); the cycle lifespan of OR4//AC could retain about 92.9% after 10 000 cycles, which demonstrated the outstanding stability of the devices (63.2% for R1//AC, 67.6% for R2, 83.8% for OR3, and 75.7% for OR5). The high retention of the OR4//AC electrode materials exceeded those reported previously via cetyltrimethylammonium bromide/sodium dodecylsulfate (CTAB/SDS) vesicle template synthesis of Mn 3 O 4 nanomaterials (at 89% after 10 000 cycles at 1 A g –1 ) and a reduced graphene oxide/Mn 3 O 4 nanocomposite (at 81% after 10 000 cycles) . The excellent cycling stability might result from the following points: (1) The uniform morphology and size of the OR4 electrode could avoid the internal collision between the nanocrystals and reduce the volume loss caused by the redox reaction .…”

“…The high retention of the OR4//AC electrode materials exceeded those reported previously via cetyltrimethylammonium bromide/sodium dodecylsulfate (CTAB/SDS) vesicle template synthesis of Mn 3 O 4 nanomaterials (at 89% after 10 000 cycles at 1 A g −1 ) 61 and a reduced graphene oxide/Mn 3 O 4 nanocomposite (at 81% after 10 000 cycles). 62 The excellent cycling stability might result from the following points: (1) The uniform morphology and size of the OR4 electrode could avoid the internal collision between the nanocrystals and reduce the volume loss caused by the redox reaction. 22 (2) The Mn 2+ /Mn 3+ ratio controlled by the overreduction strategy enhanced the electrochemical performance of manganese oxide, and the oxygen vacancies made an additional contribution to the electrochemical performance.…”

Producing “Symbiotic” Reduced Graphene Oxide/Mn3O4 Nanocomposites Directly from Converting Graphite for High-Performance Supercapacitor Electrodes

“…The two peaks at 531.70 and 530.10 eV of O 1s spectrum correspond to oxygen in defects and Mn–O–C, respectively. The Mn–O–C band indicates strong chemical interaction between Mn 3 O 4 nanoparticles and RGO …”

Preparation of Y-Doped La2Ti2O7 Flexible Self-Supporting Films and Their Application in High-Performance Flexible All-Solid-State Supercapacitor Devices

“…Besides, the energy-storage performance of the state-of-the-art supercapacitors, which are calculated based on the mass, are listed as follows: 80MnFe 2 O 4 –20rGO//80MnFe 2 O 4 –20rGO (27.7 Wh·kg –1 at 750 W·kg –1 ), Mn 3 O 4 /rGO//AC (36.76 Wh·kg –1 at 500 W·kg –1 ), NiCo 2 S 4 @MF/PPY∥Fe 2 O 3 @MF/PPY (20.1 Wh·kg –1 at 159.4 W·kg –1 ), MS-CMTBs//MS-CMTBs (15.1 Wh·kg –1 at 250 W·kg –1 ), Ni–Co–S//AC (48.9 Wh·kg –1 at 390 W·kg –1 ), rGO-FeMoO 4 @CC//rGO-MnO 2 @CC (38.8 Wh·kg –1 at 1.34 kW·kg –1 ), NiCo 2 O 4 //NiCo 2 O 4 (30.5 Wh·kg –1 at 750 W·kg –1 ), and NCHrGO/CF//NQrGO/CF (50.7 Wh·kg –1 at 204 W·kg –1 ) . In addition, the Ragone plots of these devices based on mass are exhibited in Figure S7.…”