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Outline
The effect of solid state diffusion of Li on the polarization behavior of Li-Al alloy anode was studied, and Li-Al electrodes with different specific surface areas and Cu@Li electrodes without the effect of solid state diffusion of Li were prepared. The polarization behavior of electrodeposited Li-Al alloy with a deposited capacity of 0.51 mAh/cm2 in a half cell and a full cell were investigated by using galvanostatic charge-discharge measurement, cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and galvanostatic intermittent titration technique. The results show that the solid-state diffusion of Li in Li-Al is the main reason for the polarization of Li-Al electrode in a half cell and a full cell, and the diffusional lithium trapping will increase the internal resistance of the cell, bringing in enhanced polarization phenomenon and finally resulting in the low discharge potential of about 1.84 and 1.55 V for Li-Al‖S battery. Surface α-Al layer causes diffusional lithium trapping, and disrupting it can not only increase the Li+ concentration in the electrolyte and promote the precipitation of Li2S, leading to reduced polarization, but also increase discharge voltage of LiAl‖S battery to approach the thermodynamic discharge potential.
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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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