Full
JIANG Chao (1997-), male, Master candidate. E-mail: s202114210112@stu.tyust.edu.cn
Outline
As electrode materials for supercapacitors, transition metal oxides have some advantages of high theoretical specific capacity, good chemical stability, and abundant sources. However, its inherent poor conductivity, low utilization rate, and poor cycle stability greatly hinder its practical application. Oxygen vacancies in metal oxides can effectively regulate their electronic properties, reduce the band gap, and increase their electrical conductivity, thus significantly improving their electrochemical rate performance. Furthermore, oxygen vacancies can induce a low oxidation state of the metal, provide more active sites for surface redox reactions, and improve its electrochemical storage capacity. The review introduced various preparation methods and characterization techniques of oxygen-vacancy abundant transition metal oxides. This review also represented the latest advances of various metal oxides with oxygen vacancies from single metal oxides, bimetal oxides, and heteroatom doped metal oxides to achieve the superior performance for supercapacitors. In addition, some challenges and opportunities for the further development of metal oxides in electrochemical energy storage were also pointed out.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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