Preparation method of calcium terephthalate, and application of calcium terephthalate in lithium ion battery
The invention provides a preparation method of an organic negative material calcium terephthalate, and an application of the organic negative material calcium terephthalate in a lithium ion battery. The preparation method of calcium terephthalate comprises the following steps: 1, reacting terephthal...
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Sprache: | eng |
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Zusammenfassung: | The invention provides a preparation method of an organic negative material calcium terephthalate, and an application of the organic negative material calcium terephthalate in a lithium ion battery. The preparation method of calcium terephthalate comprises the following steps: 1, reacting terephthalic acid with LiOH or NaOH or KOH to obtain a terephthalate solution; 2, reacting the terephthalate salt solution with CaCl2 or Ca (NO3)2 to obtain a mixed solution containing calcium terephthalate; 3, separating the mixed solution, and drying the solid obtained separation to obtain calcium terephthalate trihydrate; and 4, drying the calcium terephthalate trihydrate in a vacuum drying box to remove crystal water in order to obtain calcium terephthalate. The calcium terephthalate has a reversible capacity of 231mAh/g, has the advantages of excellent stability in an electrolyte, good rate capability, slow specific capacity attenuation, and maintenance of high capacity of 93% after cycling for 120 weeks, and is a lithium ion battery organic negative material with excellent performances. |
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