PPDA-mediated synthesis of uniform calliandra-like MnCo2O4.5 anodes with micro/nanostructures for advanced lithium-ion batteries

Document Type

Conference Proceeding

Publication Date



MnCo2O4.5, Micro/nanostructures, Anode materials, High Capacity, Electrochemistry, Lithium-ion Batteries


In this study, uniform Calliandra-like MnCo2O4.5 anode materials with micro/nanostructures were prepared by hydrothermal treatment with presence of positively charged poly(diallyldimethylammonium chloride) (PDDA) polymers. Physicochemical property studies suggested that the as-prepared MnCo2O4.5 of 2-5 μm in diameter was mainly composed of numerous nanoneedles, which were further comprised of many inter-connected nanoparticles. Also, PDDA polymers not only played the key role as morphology controlling agent but also led to the final formation of unusual MnCo2O4.5 crystal phase. The unique properties of Calliandra-like MnCo2O4.5 including multi-scale dimensions, mesoporous structure and multivalent states guaranteed the superior electrochemical performance in repeated chargedischarge cycles. When evaluated as electrochemical lithium storage materials, high reversible capacity (1406 mAh g-1) and excellent cycling stability (capacity retention: ~100%) were successfully demonstrated with a current density of 500 mA g-1 over 100 cycles. Even when evaluated at relatively high current densities of 1000, 2000 and 3000 mA g-1, the average reversible capacities were also achieved at about 1441, 1213 and 966 mAh g-1, respectively. Overall, the remarkable electrochemical behaviours made Calliandra-like MnCo2O4.5 promising for next generation lithium-ion battery applications

Source Publication

10th International Conference on Applied Energy August 2018, Hong Kong

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