Water-based lithium-sodium ion battery and preparation method and application thereof
A sodium-ion battery, water-based technology, applied in batteries, secondary batteries, battery electrodes, etc., can solve the problems of electrode active material shedding, battery cycle life attenuation, narrow electrochemical stability window, etc., to reduce battery self-discharge, prevent Overcharging phenomenon, simple and environmentally friendly preparation process
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[0060] Example 1: Preparation of an aqueous lithium-sodium ion battery
[0061] 1) Preparation of negative electrode active material-carbon-coated sodium titanium phosphate spherical particles
[0062] Dissolve 2000 g of sodium dihydrogen phosphate, 2000 g of titanium dioxide, and 2000 mL of phosphoric acid in 2000 mL of water, ball mill for 30 minutes, transfer to a 100-liter reactor at 150°C for 6 h, filter with suction, water, ethanol, water, and ethanol in sequence Wash, filter with suction for half an hour, transfer to a 50-degree oven, and dry overnight to obtain a precursor, disperse 100 g of glucose in 2000 g of water, spray-dry at 150°C, heat up to 700°C at 5°C / min and calcinate for 2 h in a nitrogen atmosphere , naturally cooled to room temperature to obtain carbon-coated sodium titanium phosphate spherical particles.
[0063] X-ray diffraction analysis was carried out by X-ray powder diffractometer, figure 1 It is the X-ray diffraction spectrum of the carbon-coate...
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