摘要
Next-generation energy conversion and storage systems reduce the demand of human activity for fossil fuels and the emission of greenhouse gasses(primarily carbon dioxide).The large-scale application of these energy systems requires the development of the critical component of materials,which should be environmentally friendly,low-cost,and highly energy efficient.Transitional-metal oxides have been extensively investigated and applied in energy conversion and storage systems because of their structural diversity and the regulatory nature of their electronic structures.
