Nickel-carbonate-doped manganese-carbonate-based anode material for lithium ion battery and preparation method

A negative electrode material, lithium ion technology, used in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor conductivity, low capacity retention, and large lithium ion transmission resistance, and achieve improved conductivity, capacity, and maintenance. The effect of stability

Inactive Publication Date: 2016-02-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has problems such as poor conductivity, high resistance to lithium ion transport,

Method used

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  • Nickel-carbonate-doped manganese-carbonate-based anode material for lithium ion battery and preparation method
  • Nickel-carbonate-doped manganese-carbonate-based anode material for lithium ion battery and preparation method
  • Nickel-carbonate-doped manganese-carbonate-based anode material for lithium ion battery and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] The manganese carbonate anode material doped with nickel carbonate of this embodiment uses analytically pure raw materials, and the specific preparation steps are as follows.

[0041] (1) Mn(CH 3 COO) 2 , Ni(CH 3 COO) 2 , CO(NH 2 ) 2 Mix with a molar ratio of 100:5:210, then add 30mL deionized water and 30mL ethylene glycol;

[0042] (2) Put the substances in step (1) into a Teflon hydrothermal kettle at 160°C for 8 hours;

[0043] (3) Centrifuge the product in step (2) at 4500 rpm, wash it with deionized water and ethanol 3 times, and dry it in vacuum for 12 hours;

[0044] (4) Mix the product in step (3) with acetylene black and 5% polyvinylidene fluoride-containing N,N-dimethylformamide (NMP for short) into a slurry with a mass ratio of 7:2:1 and apply it on Obtain pole pieces on copper foil;

[0045] (5) Dry the pole piece obtained in step (4) in an oven to volatilize the NMP organic solvent.

[0046] The final products prepared in the above examples are tes...

Example Embodiment

[0049] Example 2-5

[0050] Using the same method as in Example 1, the difference is only Mn(CH 3 COO) 2 , Ni(CH 3 COO) 2 , CO(NH 2 ) 2 Add in the proportion shown in Table 1.

[0051] Table 1

[0052]

[0053] The performance curve diagram of the half-cell cycle of the manganese carbonate-based negative electrode material doped with nickel carbonate for lithium ion secondary batteries of Examples 2-5 to 100 weeks was measured, and the results are shown in Table 2.

[0054] Table 2

[0055]

[0056]

[0057] The SEM image of the manganese carbonate doped nickel carbonate anode material pole piece for lithium-ion batteries of Example 2-5 and figure 2 Similarly, the material is uniform in size and evenly distributed.

[0058] Examples 6-8 adopt the same method as Example 1, except that the reaction time is shown in Table 3.

[0059] table 3

[0060]

[0061] The performance of the manganese carbonate-based negative electrode material doped with nickel carbonate for lithium ion second...

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PUM

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Abstract

The invention relates to an anode material for a lithium ion secondary battery and a preparation method thereof. The material comprises manganese carbonate doped with nickel carbonate; the doping amount of the nickel carbonate, i.e. a molar ratio of the nickel carbonate to the manganese carbonate, is 1:100 to 30:100. The preparation method comprises: firstly, mixing manganese acetate, nickel acetate and urea in a certain molar ratio; adding deionized water and an alcohols solvent; performing a hydrothermal reaction to obtain the manganese carbonate doped with the nickel carbonate. The anode material prepared by the preparation method is homogeneous in component and has no pollution in the process; first discharge capacity is greater than 1,500mAh/g, capacity is still at least 500mAh/g after 100 cycles, and a capacity retention ratio is strengthened while stability is kept; the preparation method is easy and further commercial scale production conditions are realized.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to the modification of manganese carbonate-based negative electrode materials for lithium ion batteries. Background technique [0002] With the increasingly serious problem of environmental pollution, energy consumption is expanding day by day. As a green, recyclable, high-efficiency and clean secondary battery, lithium-ion batteries are increasingly attracting people's attention. Lithium-ion batteries use lithium intercalation materials as negative electrodes and transition metal oxides as positive electrodes. Using organic electrolytes containing lithium salts, lithium ions are intercalated between the two positive and negative electrodes. energy purpose. [0003] The anode materials of commercial lithium-ion batteries are mainly based on carbon-based materials. However, its low theoretical capacity (372mAh / g) cannot satisfy the increasing capacity of ...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCH01M4/5825H01M4/624H01M10/0525Y02E60/10
Inventor 王敬包乌日古木拉苏岳锋吴锋陈实
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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