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Lithium ion battery anode material and preparation method of same, and lithium ion battery

A technology for lithium ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unstable crystal structure of materials, affecting material cycle performance, affecting material crystal growth, etc., and improving electrochemical performance. , good cycle performance, improve the effect of electronic conductivity

Active Publication Date: 2013-01-02
宁波富理电池材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, reducing the calcination temperature will affect the growth of the crystal form of the material, resulting in the instability of the crystal structure of the material and the presence of impurity peaks, thus affecting the cycle performance of the material

Method used

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  • Lithium ion battery anode material and preparation method of same, and lithium ion battery
  • Lithium ion battery anode material and preparation method of same, and lithium ion battery
  • Lithium ion battery anode material and preparation method of same, and lithium ion battery

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preparation example Construction

[0047] The present invention also provides a preparation method of the lithium ion battery cathode material described in the above technical solution, comprising the following steps:

[0048] A) Mix lithium-containing compounds, manganese-containing compounds, M-containing compounds, titanium-containing compounds, phosphorus-containing compounds and carbon-containing compounds, and ball mill them to obtain a slurry. The M is Ti, Co, Fe, Mg, Al, Cr, One or more of Nb;

[0049] B) calcining the slurry to obtain a positive electrode material for a lithium ion battery.

[0050] In the present invention, firstly, lithium-containing compounds, manganese-containing compounds, M-containing compounds, titanium-containing compounds, phosphorus-containing compounds and carbon-containing compounds are mixed with carbon-containing compounds to obtain a mixture, wherein M is Ti, Co, Fe, Mg, One or more of Al, Cr, Nb, more preferably one of Ti, Co, Fe, Mg, Al, Cr, Nb, most preferably Fe or ...

Embodiment 1

[0067] Weigh 46.156g of lithium hydroxide, 78.246g of manganese dioxide, 7.98g of ferric oxide, 15.97g of titanium dioxide, 171.678g of diammonium hydrogen phosphate and 64g of glucose, and disperse the above raw materials in 0.715kg of deionized water to form a solid The suspension with a content of 35% is ball milled for 10 hours. After the ball milling, the slurry is spray-dried, and the dry powder is calcined at a high temperature under the protection of nitrogen. The calcination temperature is 700°C and the calcination time is 9 hours. , and pulverize the calcined product to obtain the positive electrode material of the lithium ion battery.

[0068] Adopt Japan Shimadzu XRD-6000 type X-ray powder diffractometer (XRD) to characterize the positive electrode material of lithium ion battery prepared in embodiment 1, the result is as follows figure 1 as shown, figure 1 It is the XRD spectrogram of the lithium ion battery cathode material prepared in Example 1 of the present i...

Embodiment 2

[0077] Weigh 79.188g of lithium acetate, 114.95g of manganese carbonate, 160.856g of titanium sulfate, 325.008g of ammonium phosphate and 204g of phenolic resin, and disperse the above-mentioned raw materials in 0.884kg of deionized water to form a suspension with a solid content of 50%. Ball milling, the ball milling time is 15 hours, after the ball milling, the slurry is spray-dried, and the dry powder is calcined at a high temperature under the protection of nitrogen atmosphere, the calcining temperature is 800°C, the calcining time is 16 hours, and the calcined product is pulverized to obtain lithium ions battery cathode material.

[0078] Mix the positive electrode material prepared in Example 2 with acetylene black conductive agent and polyvinylidene fluoride binder in a mass ratio of 90:5:5, apply it on the aluminum foil current collector, dry it at 80°C and use a punching machine to make it The electrode sheet with a diameter of 1cm, the lithium sheet is the negative e...

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Abstract

The invention provides a lithium ion battery anode material. The lithium ion battery anode material comprises the compound with the atomic ratio shown as the general formula (I), and carbon, LiMn(1-x)MxPO4.yLiTi2(PO4)3 (I), wherein M is one or more of titanium, cobalt, ferrum, magnesium, aluminium, chromium and niobium, x is not less than 0 and not more than 0.2, and y is more than 0 and not more than 0.2. The invention provides a preparation method of lithium ion battery anode material, comprising the following steps of: mixing the lithium-containing compound, the manganese-containing compound, the M-containing compound, the titanium-containing compound, the phosphorus-containing compound and the carbon-containing compound, and executing ball milling on the mixture to obtain the slurry, wherein M is one or more of titanium, cobalt, ferrum, magnesium, aluminium, chromium and niobium; and burning the slurry to obtain the lithium ion battery anode material. The invention further provides a lithium ion battery, wherein the anode of the lithium ion battery is prepared from the anode material in the above technical scheme or the anode material prepared by the preparation method in the above technical scheme.

Description

technical field [0001] The invention mainly relates to the technical field of lithium ion batteries, in particular to a lithium ion battery cathode material, a preparation method thereof and a lithium ion battery. Background technique [0002] As a kind of electrochemical energy source, lithium ion battery has the advantages of high voltage, light weight, high specific energy, small self-discharge, long cycle life, no memory effect and less environmental pollution. With the continuous expansion of the functions of electronic terminal products, the requirements for lithium-ion batteries are also getting higher and higher. Among them, the positive electrode material is a key factor affecting the performance of lithium-ion batteries. [0003] Polyanionic phosphate cathode materials represented by lithium iron phosphate have attracted extensive attention in the fields of power batteries and energy storage because of their stable structure, excellent safety performance, and envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 夏永高刘兆平陈立鹏
Owner 宁波富理电池材料科技有限公司
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