A kind of aqueous lithium sodium ion battery and its preparation method and application
A sodium-ion battery and water-based technology, applied in batteries, battery electrodes, secondary batteries, etc., can solve problems such as narrow electrochemical stability window, battery cycle life attenuation, and electrode active material shedding, so as to widen the operating temperature range and reduce Effects of self-discharge, hydrogen evolution and oxygen evolution reaction inhibition
Active Publication Date: 2022-02-01
湖州青钠新能源科技有限公司
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Problems solved by technology
[0007] In order to solve the problems of the narrow electrochemical stability window of the electrolyte of the aqueous lithium-sodium ion battery, the current collector corrodes, the electrode active material falls off, the weight of the current collector is large, the cycle life of the battery is attenuated, and the operating temperature range is narrow, the present invention provides an aqueous lithium sodium ion battery. An ion battery and a preparation method thereof, the battery is a lithium-sodium ion battery of a lithium manganese oxide-carbon coated sodium titanium phosphate system, and lithium sulfate, sodium sulfate or zinc sulfate are dissolved in a mixed solvent of water and urea to form a medium-concentration solution as the electrolytic Liquid and hydrothermal method for macro-preparation of highly consistent carbon-composite sodium titanium phosphate as negative electrode material, lithium manganate as positive electrode material, graphite, carbon nanotubes, polyvinylidene fluoride, and polymer network to prepare graphite-based composite film as current collector assembly The prepared battery has the advantages of long cycle life, high charge and discharge coulombic efficiency, low self-discharge rate, high energy density, low price, high rate performance, and wide operating temperature range
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Embodiment 1
[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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Abstract
The invention discloses a water-based lithium-sodium ion battery and its preparation method and application. The battery uses lithium manganate material as the positive electrode active material, and carbon composite titanium sodium phosphate material as the negative electrode active material; lithium salt, sodium salt, zinc salt and urea Dissolved in water to prepare a mixed electrolyte; graphite, carbon nanotubes, polyvinylidene fluoride and polymer nets are compounded to prepare graphite-based composite films as positive and negative current collectors; electrode sheets are prepared by coating method, and electrodes are prepared by lamination method. Core, stainless steel or graphite nuts are connected to the tab method to assemble the battery. The prepared battery has the advantages of long cycle life, high charge-discharge coulombic efficiency, low self-discharge rate, high energy density, low price, high rate performance, and wide operating temperature range, and can be used as an electric bicycle power battery or energy storage battery.
Description
technical field [0001] The invention relates to the technical field of energy storage devices, in particular to an aqueous lithium-sodium ion battery and a preparation method and application thereof. Background technique [0002] Due to the continuous improvement of electric bicycles' requirements for energy storage devices, different batteries are used as electric bicycle power batteries and energy storage batteries for research. The aqueous lithium-sodium-ion battery has become a very promising candidate for battery materials in this field due to its advantages such as abundant raw material sources, environmental friendliness, safety, and low price. [0003] The traditional lithium-sodium-ion battery is an organic electrolyte battery, which has certain safety hazards. Moreover, due to the strict requirements of the manufacturing process, the cost is relatively high, and recycling is also difficult. The use of aqueous electrolyte can solve the above problems well. In 199...
Claims
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IPC IPC(8): H01M4/58H01M4/66H01M4/505H01M10/36H01M10/38
CPCH01M4/5825H01M4/666H01M4/663H01M4/668H01M4/505H01M10/36H01M10/38H01M2220/20H01M2300/0002H01M2300/0091H01M2004/027H01M2004/021Y02E60/10Y02P70/50
Inventor 侯之国钱逸泰张雪倩钱逸仁
Owner 湖州青钠新能源科技有限公司