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Compound lithium titanate negative-electrode material and preparation method thereof

A technology of composite lithium titanate and negative electrode materials, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of battery consistency difference, high price, low energy density, etc., and achieve good battery dynamic performance and large discharge capacity , the effect of high cycle performance

Inactive Publication Date: 2014-01-22
HEFEI HENGNENG NEW ENERGY TECH
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  • Abstract
  • Description
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Problems solved by technology

However, there are also certain shortcomings, such as lower energy density compared to other types of lithium-ion power batteries; higher price than other types of lithium-ion power batteries; differences in battery consistency, etc., which need further research and development

Method used

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Embodiment Construction

[0009] The present invention will be described in detail below through specific examples.

[0010] A composite lithium titanate negative electrode material, made of the following raw materials in parts by weight (kg): lithium titanate 400, nano-carbon 4, sodium hexametaphosphate 2, celestite powder 4, modified silver powder 4, and an appropriate amount of water;

[0011] The modified silver powder is made of the following raw materials in parts by weight (kg): silver powder 100, nano-carbon 1, kaolin powder 1, phytate 2, borax 2, silicon powder 1, aminopropyltriethoxysilane 1. Fe 3 o 4 3. SnO 2 1.V 2 o 5 1. Mix all raw materials evenly, heat to 50-55°C, grind for 1-2 hours, disperse evenly into powder, send it to a calciner and sinter at 550-580°C for 2-3 hours.

[0012] The composite lithium titanate negative electrode material of the present invention is made by the following specific steps: mixing other raw materials except modified silver powder, adding an appropri...

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Abstract

The invention discloses a compound lithium titanate negative-electrode material. The compound lithium titanate negative-electrode material is characterized by comprising, by weight, 400 parts of lithium titanate, 4-5 parts of nano-carbon, 2-3 parts of sodium hexametaphosphate, 4-5 parts of celestite powder, 4-5 parts of modified silver powder and an appropriate amount of water. According to the compound lithium titanate negative-electrode material, the modified silver powder is added, so that the compound lithium titanate negative-electrode material has the good battery dynamics performance, the good cycle performance and the high-magnification charge-discharge capacity, and therefore the performance of a lithium ion battery with the compound lithium titanate negative-electrode material serving as the negative-electrode material is improved. The compound lithium titanate negative-electrode material is large in discharge capacity, capable of guaranteeing the consistency of industrialization and the long service life of a power battery, low in price, and free of toxicity and environmental pollution.

Description

technical field [0001] The invention relates to the field of chemical energy materials, in particular to a composite lithium titanate negative electrode material and a preparation method thereof. Background technique [0002] Lithium titanate, as the anode material of lithium-ion batteries, has become the anode material of the new generation of lithium-ion batteries and is widely used in new energy vehicles, Electric motorcycles and applications requiring high safety, high stability and long cycle times. (1) It is a zero-strain material with good cycle performance (2) The discharge voltage is stable, and the electrolyte will not decompose, which improves the safety performance of lithium batteries; (3) Compared with carbon negative electrode materials, lithium titanate has high lithium ion Diffusion coefficient, high-rate charge and discharge, etc. (4) The potential of lithium titanate is higher than that of pure metal lithium, and it is not easy to produce lithium dendrite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485
CPCH01M4/364H01M4/485Y02E60/10
Inventor 林彭桃君蒋森陈夕顺
Owner HEFEI HENGNENG NEW ENERGY TECH
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