A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Co‐MnO2 Nanorods for High‐Performance Sodium/Potassium‐Ion Batteries and Highly Conductive Gel‐Type Supercapacitors
Manganese dioxide (MnO2) is considered as a strong candidate in the field of new‐generation electronic equipment. Herein, Co‐MnO2 has excellent electrochemical properties in tests as the cathode electrode of sodium‐ion batteries and potassium‐ion batteries. The rate performance remains at 50.2 mAh g−1 at 200 mA g−1 for sodium‐ion batteries. X‐ray diffraction (XRD) is utilized to evaluate the crystal structure transition from Co0.2‐MnO2 to NaMnO2 with discharge to 1 V, proving that Co‐doping does indeed facilitate the acceleration of ion transport and support layer spacing to stabilize the structure of MnO2. Subsequently, highly conductive (0.0848 S cm−1) gel‐type supercapacitors are prepared by combining Co0.2‐MnO2, potassium hydroxide (KOH), and poly(vinyl alcohol) (PVA) together. Co0.2‐MnO2 provides capacitive behavior and strengthens the hydrogen bonds between molecules. KOH acts as an ion crosslinker to enhance hydrogen bond and as electrolyte to transport ions. 5 wt% Co0.2‐MnO2@KOH/PVA has superb mechanical endurance, appreciable electrical conductivity, and ideal capacitive behavior. The quasi‐solid‐state supercapacitor demonstrates stabilized longevity (86.5% at 0.2 mA cm−3 after 500 cycles), which can greatly promote the integration of flexible energy storage fabric devices.
Co‐MnO2 Nanorods for High‐Performance Sodium/Potassium‐Ion Batteries and Highly Conductive Gel‐Type Supercapacitors
Manganese dioxide (MnO2) is considered as a strong candidate in the field of new‐generation electronic equipment. Herein, Co‐MnO2 has excellent electrochemical properties in tests as the cathode electrode of sodium‐ion batteries and potassium‐ion batteries. The rate performance remains at 50.2 mAh g−1 at 200 mA g−1 for sodium‐ion batteries. X‐ray diffraction (XRD) is utilized to evaluate the crystal structure transition from Co0.2‐MnO2 to NaMnO2 with discharge to 1 V, proving that Co‐doping does indeed facilitate the acceleration of ion transport and support layer spacing to stabilize the structure of MnO2. Subsequently, highly conductive (0.0848 S cm−1) gel‐type supercapacitors are prepared by combining Co0.2‐MnO2, potassium hydroxide (KOH), and poly(vinyl alcohol) (PVA) together. Co0.2‐MnO2 provides capacitive behavior and strengthens the hydrogen bonds between molecules. KOH acts as an ion crosslinker to enhance hydrogen bond and as electrolyte to transport ions. 5 wt% Co0.2‐MnO2@KOH/PVA has superb mechanical endurance, appreciable electrical conductivity, and ideal capacitive behavior. The quasi‐solid‐state supercapacitor demonstrates stabilized longevity (86.5% at 0.2 mA cm−3 after 500 cycles), which can greatly promote the integration of flexible energy storage fabric devices.
Co‐MnO2 Nanorods for High‐Performance Sodium/Potassium‐Ion Batteries and Highly Conductive Gel‐Type Supercapacitors
Han, Jun (author) / Li, Dian‐sen (author) / Jiang, Lei (author) / Fang, Dai‐ning (author)
Advanced Science ; 9
2022-03-01
8 pages
Article (Journal)
Electronic Resource
English
MnO2@SnO2 core–shell heterostructured nanorods for supercapacitors
| British Library Online Contents | 2014
Sparse MnO2 nanowires clusters for high-performance supercapacitors
| British Library Online Contents | 2012
MnO2 nanorods/3D-rGO composite as high performance anode materials for Li-ion batteries
| British Library Online Contents | 2017
Hierarchical mesoporous Ni-P@MnO2 composite for high performance supercapacitors
| British Library Online Contents | 2017
Facile synthesis of 3-D composites of MnO2 nanorods and holey graphene oxide for supercapacitors
| British Library Online Contents | 2015