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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

AI Technical Summary

Problems solved by technology

However, it also has problems such as poor conductivity, high resistance to lithium ion transport, and low capacity retention. To achieve practical use, these problems need to be resolved urgently.

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

Embodiment 1

[0040] The manganese carbonate negative electrode material doped with nickel carbonate in 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 at a molar ratio of 100:5:210, then add 30mL deionized water and 30mL ethylene glycol;

[0042] (2) Put the substance in step (1) into a Teflon hydrothermal kettle and react at 160°C for 8h;

[0043] (3) The product in step (2) was centrifuged at 4500rpm, washed 3 times with deionized water and ethanol, and dried in vacuum for 12 hours;

[0044] (4) The product in step (3) and acetylene black, N,N-dimethylformamide (abbreviated as NMP) containing 5% polyvinylidene fluoride are mixed into mud with a mass ratio of 7:2:1 and then applied on the On the copper foil, the pole piece is obtained;

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

[0046] The final product...

Embodiment 2-5

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

[0051] Table 1

[0052]

Mn(CH 3 COO) 2

Ni(CH 3 COO) 2

CO(NH 2 ) 2

Example 2

100

10

220

Example 3

100

15

230

Example 4

100

20

240

Example 5

100

25

250

[0053] The performance curves of the manganese carbonate-based negative electrode material half-cell doped with nickel carbonate for the lithium ion secondary battery of Examples 2-5 were cycled to 100 cycles, and the results are shown in Table 2.

[0054] Table 2

[0055]

[0056]

[0057] The SEM figure and figure 2 Similarly, the material is uniform in size and well distributed.

[0058] Embodiment 6-8 adopts the method identical with embodiment 1, and its difference is only that reaction time adopts the time reaction shown in table 3...

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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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