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Method for preparing cathode electrode material of nanobelt-type lithium ion battery

A lithium-ion battery, cathode electrode technology, applied in the direction of battery electrodes, nanotechnology, circuits, etc., can solve the problems of research and practical application limitations, poor battery cycle performance, non-reversible process, etc., achieve no by-products, reduce interface resistance , the effect of inhibiting expansion

Inactive Publication Date: 2011-04-13
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

But MoO 3 There are also many inherent defects: Li-ion in MoO 3 The transfer rate in is very low, during the intercalation and extraction process, MoO 3 A large volume change will occur, which is not an ideal reversible process, so MoO 3 When used as a cathode material, the cycle performance of the battery is poor, and its research and practical application are subject to many restrictions

Method used

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  • Method for preparing cathode electrode material of nanobelt-type lithium ion battery
  • Method for preparing cathode electrode material of nanobelt-type lithium ion battery
  • Method for preparing cathode electrode material of nanobelt-type lithium ion battery

Examples

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Embodiment 1

[0020] Measure 200 mL of HY1001M hydrogen ion exchange resin (produced by Beijing Haideneng Chemical Company). First fill the exchanger with water from the bottom to 1 / 2, and then slowly fill the resin from the upper port to ensure that there are no air bubbles. After the resin is fully loaded into the exchanger, first soak it with about 10wt% NaCl solution for 8 hours, and then backwash the resin layer with deionized water until the effluent is basically clear without obvious odor, impurities or finely divided resin. Then use about 2 times the volume of the resin, that is, about 400mL of HCI solution with a volume ratio of 5% concentration, at about 3cmmin -1 Flow rate through the resin layer. After the HCl solution has completely flowed through the exchanger, soak the resin with newly prepared HCl with a concentration of 5% by volume for about 4 hours. Drain the acid solution, rinse the resin with deionized water until the effluent is basically neutral. Then use 400mL of ...

Embodiment 2

[0026] The ion exchange resin column was treated as Example 1 to obtain a clear green colloid. Transfer the obtained colloid to a hydrothermal kettle with a polytetrafluoroethylene liner, seal the lid of the kettle tightly, and react in an oven at 180°C for 14 hours, take out the reaction kettle and let it cool naturally in the air, filter and wash the precipitate, and remove it under vacuum at 80°C. Dry for 8 hours to get MoO 3 nanobelt.

[0027] Weigh 0.2g of the prepared MoO 3 nanobelts with 0.661 g of anhydrous MgCl 2 , dissolved in 30mL deionized water, ultrasonically dispersed for 0.5 hours, stirred for two days, then transferred the resulting solution to a 45mL polytetrafluoroethylene liner hydrothermal kettle, sealed the lid tightly, and reacted in an oven at 180°C for 16 hour, take out the reaction kettle to cool naturally in the air, select 0.2μm polytetrafluoromembrane, filter through suction, wash the precipitate repeatedly with deionized water until the pH valu...

Embodiment 3

[0030] The ion exchange resin column was treated as Example 1 to obtain a clear green colloid. Transfer the obtained colloid to a hydrothermal kettle with a polytetrafluoroethylene liner, seal the lid of the kettle tightly, and react in an oven at 180°C for 45 hours, take out the reaction kettle and let it cool naturally in the air, filter and wash the precipitate, and remove it under vacuum at 80°C Dry for 8 hours to get MoO 3 nanobelt.

[0031] Weigh 0.2g of the prepared MoO 3 nanoribbons with 1.32 g anhydrous MgCl 2 , dissolved in 30mL deionized water, ultrasonically dispersed for 0.5 hours, stirred for five days, then transferred the resulting solution to a 45mL polytetrafluoroethylene-lined hydrothermal kettle, sealed the lid tightly, and reacted in an oven at 180°C for 20 hour, take out the reaction kettle to cool naturally in the air, select 0.2μm polytetrafluoromembrane, filter through suction, wash the precipitate repeatedly with deionized water until the pH value ...

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Abstract

The invention discloses a method for preparing a cathode electrode material of a nanobelt-type lithium ion battery, belonging to the technical field of energy. The method comprises the following steps: preparing a MoO3 nanobelt by using a hydrothermal method, evenly blending the MoO3 nanobelt and MgCl2 solution and stirring; then performing hydrothermal treatment once again; and utilizing Mg to dope the MoO3 nanobelt. By using the method, the specific area of MoO3 is greatly improved, the transmission speeds of electrons and ions are increased, and the embedding and abjection of lithium ions are promoted, thus improving the large-current discharging performance of the material of the battery; after Mg is doped, due to the polarization of Mg, the crystal face of MoO3 is contracted, therebyinhibiting the expansion of the material during charging and discharging; meanwhile, due to the doping of Mg, Li-O keys are weaken, the interface resistance is reduced, the mobility of the lithium ions is improved and the reversible capacity and cycling performance of the material are improved; and in addition, the preparation method provided by the invention has the characteristic of simple flow, small energy consumption and the like, and is beneficial to large-scale preparation and production.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a preparation method of a cathode electrode material of a nanoribbon-shaped lithium ion battery. Background technique [0002] The energy problem has always been one of the key factors affecting the development and changes of human society, and it has also become one of the problems that human beings must solve in the future. With the operation and development of human society, the consumption of energy is increasing, and the energy problem has become a key issue for the survival and continuation of human beings. At present, mineral energy represented by oil, coal and natural gas supports the operation of the world. However, as we all know, mineral energy materials are non-renewable energy sources, their reserves are limited, and they have also caused serious environmental problems. In this context, lithium-ion batteries have become the direction to solve these problems because...

Claims

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Application Information

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IPC IPC(8): H01M4/1391B82Y40/00
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 李景虹吴勇民王浩然
Owner TSINGHUA UNIV
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