A rechargeable aqueous solution energy storage device
An aqueous solution, charging and discharging technology, applied in the direction of electrical components, electrochemical generators, circuits, etc., can solve the problems of low battery voltage and low energy density, and achieve the solution of low voltage, high energy density, and high electrochemical stability window Effect
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Embodiment 1
[0050] Except that the electrolyte is 4M Mg(ClO 4 )+1M LiClO 4 Except +20wt.% PEG-400 aqueous solution, other compositions and test conditions are the same as Comparative Example 1. The data obtained from the tests are summarized in Table 1. Its CV diagram at a scan rate of 0.3mV / s, the charge-discharge curve at a current density of 0.25A / g, and the 300-time charge-discharge cycle curve are shown in Figure 1(a), Figure 1(b) and Figure 1, respectively. (c).
Embodiment 2
[0054] Except that the electrolyte is 4M Mg(ClO 4 )+1M LiClO 4 Except for +10wt.% PVA aqueous solution, other compositions and test conditions are the same as Comparative Example 2. The data obtained from the tests are also summarized in Table 1. Its CV diagram at a scan rate of 0.3mV / s, the charge-discharge curve at a current density of 1A / g, and 300 charge-discharge cycle curves are shown in Figure 1(a), Figure 1(b) and Figure 1( c).
Embodiment 3
[0058] Except that the electrolyte is 6M Mg(ClO 4 )+10wt.% PEO aqueous solution, other compositions and test conditions are the same as Comparative Example 2. The data obtained from the tests are also summarized in Table 1. Its CV diagrams at different scan rates, charge-discharge curves at different current densities, and 2200 charge-discharge cycle curves are shown in Figure 3(a), Figure 3(b) and Figure 3(c), respectively.
[0059] Table 1. Part data and results of comparative examples and embodiments
[0060]
[0061]
[0062] *: Data calculated based on the actual capacity and actual average voltage of positive and negative active materials;
[0063] **: Negative electrode material is calculated based on the amount of metal magnesium as 1 mole.
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