PENG Chenglong (1993−), male, Doctoral candidate. E-mail: clpeng@cug.edu.cn
Natural molybdenite has the advantages of low cost and high lithium storage capacity, which can be directly used as an anode material of lithium-ion batteries. In this paper, expanded molybdenite/carbon (EM/C) composites were constructed via expanding molybdenite and surface modification with dopamine. The worm-like structure of expanded molybdenite (EM) has a high specific surface area that is conducive to electrolyte infiltration and diffusion of lithium ions. The amorphous carbon layer effectively increases its electrical conductivity and provides a buffer space for volume enlargement during MoS2 cycle. The EM/C composites have a long cycle life and a high capacity, with a capacity of 1 213 mA·h/g at 100 mA/g after 200 cycles and a reversible capacity of 623 mA·h/g even at 1 A/g. The strategy of EM/C composite material constructed from molybdenite fine powder has a specific guiding significance to achieve the superior electrochemical performance of lithium-ion battery.
| 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 |