Lithium vanadate anode material and preparation method thereof

A positive electrode material, lithium vanadate technology, applied in the direction of battery electrodes, electrical components, circuits, etc., can solve the problem that the rate performance needs to be improved, and achieve the effects of fast capacity decay, improved cycle performance, and stable structure
CN103094572AInactive Publication Date: 2013-05-08XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIANGTAN UNIV
Publication Date
2013-05-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lithium vanadate anode material which consists of nanosphere-shaped lithium vanadate particles with hollow core-shell structures, wherein nano holes are distributed in the core-shell layer. The preparation method comprises the following steps: dissolving a compound containing tetravalent vanadium in a reducing solvent, stirring until the solution is clarified, transferring the obtained clarified liquor into a sealed reaction kettle for carrying out a reduction reaction, cooling the liquor to room temperature after the reduction reaction is finished so as to obtain a nano V2O3 precipitate with a hollow structure; dissolving the obtained nano V2O3 precipitate and a lithium source compound in an organic solvent for sharply stirring, drying the products obtained in the reaction, and sintering the products to obtain the particles. The positive active material of the prepared lithium vanadium oxide has a hollow structure, is small in particle size, high in dispersing property, high in electric capacity and high in stability and has high cycle performance and high rate performance; and moreover, in the whole process, the synthesis temperature is low, the energy loss is low, the operation is easy and large-scale production can be performed.
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Description

technical field

[0001] The invention discloses a preparation method of a lithium vanadate cathode material, belonging to the technical field of lithium ion battery material preparation technology. Background technique

[0002] Lithium-ion battery, as a new type of green battery, has been gradually replacing the traditional secondary batteries due to its advantages of high working voltage, light weight, large specific energy, small self-discharge rate, long cycle life, no memory effect, and no environmental pollution. The position of secondary batteries such as lead-acid batteries, nickel-cadmium batteries, and nickel-metal hydride batteries has become an ideal power source for small and lightweight electronic devices such as cameras, mobile phones, notebook computers, and portable measuring instruments, as well as environmentally friendly electric vehicles. Since Japan successfully developed lithium-ion batteries and put them on the market in 1990, there has been a wave of l...

Claims

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