Titanium phosphorus oxide negative electrode material for water-based sodium ion hybrid supercapacitor battery and preparation method thereof
A hybrid supercapacitor and titanium phosphorus oxide technology, applied in the field of electrochemical energy, achieves good cycle stability, high consistency, and overall structural stability.
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[0026] The invention provides a method for preparing a titanium phosphorus oxide ((TiO)xPyOz) negative electrode material for an aqueous sodium ion mixed supercapacitor battery. The titanium phosphorus oxide material is synthesized by a co-precipitation method and consists of (TiO) xPyOz, said method comprises:
[0027] 1) Synthesize the precursor (TiO)xPyOz by co-precipitation method, where 0<x<3, 0<y<3, 0<z<12;
[0028] 2) The desired product can be obtained by roasting the precursor (TiO)xPyOz at high temperature.
[0029] The active material on the negative plate adopts titanium phosphorus oxide ((TiO)xPyOz) synthesized by co-precipitation method, comprising the following steps:
[0030] (a) Use soluble titanium salt as titanium source, phosphate as phosphorus source, carry out batching according to the ratio of Ti:P molar ratio of 1:1-2, weigh titanium source and phosphorus source as mixed raw materials, and mix raw materials Mix and dissolve, then add a certain amount ...
Embodiment 1
[0051] (1) Preparation of (TiO)xPyOz anode
[0052] with C 16 h 36 o 4 Ti is the titanium source, (NH 4 ) 2 HPO 4 As the phosphorus source, the molar ratio of Ti:P is 1:1, and the titanium source and the phosphorus source are weighed as the mixed raw materials, and the mixed raw materials are mixed and dissolved, and a certain amount of sodium carbonate aqueous solution is added. Heat for 8 hours until the solvent evaporates; wash the obtained precursor with a solvent, dissolve and wash off some soluble salts, and then dry it in an oven at 100°C for 12 hours to obtain a precursor; then place it in a muffle furnace at 2°C / min The temperature was raised to 900°C for 5 hours, cooled to obtain (TiO)xPyOz negative electrode material, and its XRD was as follows: figure 1 As shown, SEM as figure 2 shown.
[0053] (2) Preparation of positive and negative pole pieces
[0054] The synthesized (TiO)xPyOz sample, conductive agent, and binder polytetrafluoroethylene (PTFE) were m...
Embodiment 2
[0058] (1) Preparation of (TiO)xPyOz anode
[0059] With Ti(SO 4 ) 2 is the titanium source, (NH 4 ) 2 HPO 4 As a phosphorus source, the molar ratio of Ti:P is 1:1.5 for batching. Weigh the titanium source and phosphorus source as the mixed raw materials, mix and dissolve the mixed raw materials, add a certain amount of ammonia water, and heat in a water bath at 60°C for 8 hours , until the solvent evaporates; wash the obtained precursor with a solvent, dissolve and wash off some soluble salts, and then dry it in an oven at 120°C for 10h to obtain a precursor; then place it in a muffle furnace at a rate of 2°C / min The temperature is raised to 800° C., calcined for 2 to 12 hours, and cooled to obtain (TiO)xPyOz negative electrode material.
[0060] (2) The preparation of the pole piece, the assembly of the experimental supercapacitor battery and the test of its electrochemical performance are the same as in Example 1. The synthesized (TiO)xPyOz was used as the negative el...
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