Quasi-solid state electrolyte for sodium ion battery based on hydrated glass and preparation method and application thereof
A sodium-ion battery, electrolyte technology, applied in electrolytes, secondary batteries, circuits and other directions, can solve the problems of poor gel cycle performance, poor cycle performance, unfavorable network structure, etc., to ensure stability and safety performance, good Effects of ion transport properties, high ionic conductivity
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[0035] The preparation method of the sodium ion battery electrolyte of described hydrated glass base, the steps are as follows:
[0036] 1) Press Na 2 O:B 2 o 3 :SiO2 2 :H 2 O = 8-30:0.5-3:20-70:2-60 Weigh the required matrix raw materials, add 0-10 wt% sodium salt external admixture, mix and stir in the reaction kettle at room temperature Uniform, after standing for clarification and aging, a colorless transparent liquid is formed;
[0037] 2) Heat the above colorless transparent liquid at 20-350 °C for 12-48 h to control the water content, and obtain a viscous liquid electrolyte with a water content greater than 20 wt% or an elastic solid with a water content less than 20 wt% at room temperature electrolyte;
[0038] 3) Depending on the state at room temperature, the viscous liquid electrolyte is assembled and formed by the pouring-heat sealing method, and the elastic solid electrolyte is assembled and formed by the curing hot pressing method. During the assembly and m...
Embodiment 1
[0052] Press Na 2 O:B 2 o 3 :SiO2 2 :H 2 O = 20:2:60:18 mass ratio. The raw materials used are sodium silicate aqueous solution and boric acid, and the test battery is assembled by the above curing hot pressing method. The drying temperature is 20°C, and the hot pressing temperature is 70°C. The electrochemical performance test was carried out on the assembled battery, and the working temperature was 60 ℃ during the test.
Embodiment 2
[0054] Press Na 2 O:B 2 o 3 :SiO2 2 :H 2 O = 19.6:2:58.8:17.4 matrix mass ratio, sodium salt 2 wt%. The raw materials used are sodium silicate aqueous solution, boric acid, and sodium sulfate, and the test battery is assembled by the above curing hot pressing method. The drying temperature is 20°C, and the hot pressing temperature is 70°C. The electrochemical performance test was carried out on the assembled battery, and the working temperature was 60 ℃ during the test.
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