Functional electrolyte for improving charge-discharge efficiency of lithium ion battery and application thereof
A lithium-ion battery, charge-discharge efficiency technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of low charge-discharge efficiency of lithium-ion batteries, improve charge-discharge efficiency and capacity retention rate, and improve compatibility. Effect
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Embodiment 2
[0031] Table 3 shows the capacity retention rates of the batteries of Example 2 and Comparative Example 1 after 100 cycles. The capacity cycle of embodiment 2 and comparative example 1 is as follows figure 2 shown.
[0032] Table 3 Capacity retention rate of battery after 100 cycles
[0033]
Example 2
Comparative example 1
Retention rate(25℃)
99.1%
95.3%
Retention rate(55℃)
99.4%
96.4%
[0034] image 3 It can be seen that the battery of Example 2 has two semicircles in the impedance diagram, and has a smaller interface film impedance. The impedance of Comparative Example 1 has only one semicircle, and the impedance is greater than the battery impedance value of Example 2. It shows that after adding this functional additive, LiNi 0.5 mn 1.5 o 4 A dense layer of SEI film is formed on the surface of the electrode, which can avoid direct contact between the electrolyte and the electrode surface, protect the electrode...
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