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Microsphere laminated lithium-enriched manganese-based solid solution anode material and preparation method thereof

A lithium-rich manganese-based, cathode material technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of difficult control of material consistency, harsh control conditions, low energy density, etc., and achieve low cost, good morphology and structure. , the effect of high energy density

Active Publication Date: 2015-06-17
DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the conventional LiCoO 2 The discharge specific capacity is only 160mAh / g, because Co is a rare element, the cost is high, and Co is toxic and will cause certain pollution to the environment
LiFePO 4 Low energy density and poor conductivity, etc., and the control conditions are more stringent during production, and the consistency of materials is difficult to control

Method used

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  • Microsphere laminated lithium-enriched manganese-based solid solution anode material and preparation method thereof
  • Microsphere laminated lithium-enriched manganese-based solid solution anode material and preparation method thereof
  • Microsphere laminated lithium-enriched manganese-based solid solution anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The molecular formula of the lithium-rich manganese-based solid solution cathode material of this embodiment is 0.3Li 2 mn 0.9 Cr 0.1 o 3 0.7LiMn 0.34 Ni 0.33 co 0.33 o 2 .

[0040] The preparation method of the lithium-rich manganese-based solid solution positive electrode material in this embodiment has the following steps:

[0041] 1) Preparation of precursor ①:

[0042] a) Preparation of solution:

[0043] Solution A: Mn(NO 3 ) 2 , Ni(NO 3 ) 2 , Co(NO 3 ) 2 Weigh according to Mn:Ni:Co molar ratio 0.34:0.33:0.33, add deionized water to make a total concentration of 1.0mol / L metal salt solution;

[0044] Solution B: Prepare a LiOH solution with a concentration of 1.0mol / L as a precipitant;

[0045] Solution C: Prepare ammonia water with a concentration of 1.0mol / L as a complexing agent;

[0046] b) Co-precipitation:

[0047] Add 100mL of deionized water into the reaction kettle, the temperature of the water bath is 40°C, and nitrogen gas is introduce...

Embodiment 2

[0061] The molecular formula of the lithium-rich manganese-based solid solution cathode material of this embodiment is 0.2Li 2 mn 0.95 Fe 0.05 o 3 0.8LiMn 0.7 Ni 0.2 co 0.1 o 2 .

[0062] The preparation method of the lithium-rich manganese-based solid solution positive electrode material in this embodiment has the following steps:

[0063] 1) Preparation of precursor ①:

[0064] a) Preparation of solution:

[0065] Solution A: MnSO 4 、C 4 h 6 NiO 4 、C 4 h 6 CoO 4 Weigh according to Mn:Ni:Co molar ratio 0.7:0.2:0.1, add deionized water to make a total concentration of 3.0mol / L metal salt solution;

[0066] Solution B: Prepare a KOH solution with a concentration of 6.0mol / L as a precipitant;

[0067] Solution C: Prepare ammonia water with a concentration of 0.1mol / L as a complexing agent;

[0068] b) Co-precipitation:

[0069] Add 100mL of deionized water into the reaction kettle, the temperature of the water bath is 50°C, and after argon gas is introduced to...

Embodiment 3

[0082] The molecular formula of the lithium-rich manganese-based solid solution cathode material in this embodiment is 0.1Li 2 mn 0.9 Mg 0.05 Al 0.05 o 3 0.9LiMn 0.5 Ni 0.5 o 2 .

[0083] The preparation method of the lithium-rich manganese-based solid solution positive electrode material in this embodiment has the following steps:

[0084] 1) Preparation of precursor ①:

[0085] a) Preparation of solution:

[0086] Solution A: MnCO 3 、NiSO 4 Weigh according to Mn:Ni molar ratio 0.5:0.5, add deionized water to make a total concentration of 4.0mol / L metal salt solution;

[0087] Solution B: Prepare a NaOH solution with a concentration of 4.0mol / L as a precipitant;

[0088] Solution C: Prepare ammonia water with a concentration of 2.0mol / L as a complexing agent;

[0089] b) Co-precipitation:

[0090] Add 100mL of deionized water into the reaction kettle, the temperature of the water bath is 60°C, and nitrogen is introduced to make the reaction environment oxygen-fr...

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Abstract

The invention discloses a microsphere laminated lithium-enriched manganese-based solid solution anode material, wherein the molecular formula is xLi2Mn1-yNyO3*(1-x)LiMn1-zMzO2; in the formula, M is one or more of Ni and Co; N is one or more of Fe, Cr, Al and Mg; x is more than 0 and less than or equal to 0.3; y is more than 0 and less than or equal to 0.1; and z is more than 0 and less than or equal to 0.7. The invention discloses a preparation method of the material at the same time. The preparation method comprises the following steps of: (1), after co-precipitating a manganese source compound and an M source compound, and sintering the manganese source compound and the M source compound with a lithium source compound in a mixed manner to obtain a precursor 1); (2), sintering the manganese source compound, the lithium source compound and an N element oxide in a mixed manner to obtain a precursor 2); and (3), mixing, acidly washing, spraying and drying the precursor 1) and the precursor 2), and sintering to obtain the lithium-enriched manganese-based solid solution anode material. The microsphere laminated lithium-enriched manganese-based solid solution anode material disclosed by the invention has the advantages of high energy density, good cycle performance, low cost, safety, excellent performance and the like and is applied to the power field with high energy and long service life.

Description

technical field [0001] The invention relates to a microsphere layered lithium-rich manganese-based solid solution positive electrode material and a preparation method of the material, belonging to the field of positive electrode materials. Background technique [0002] With the emergence of energy problems and increasingly serious environmental pollution, lithium batteries with high energy density, high safety, small size and long cycle life are widely used in portable electronic products, electric vehicles and other fields. [0003] Cathode materials are one of the important reasons restricting the development of lithium batteries, and the specific capacity of graphite-based negative electrode materials has exceeded 300mAh / g. While the conventional LiCoO 2 The discharge specific capacity of the battery is only 160mAh / g. Because Co is a rare element, the cost is high, and Co is poisonous and will cause certain pollution to the environment. LiFePO 4 The low energy density ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 侯红军李世江罗成果罗传军杨华春李云峰籍兵靳庆国许飞薛旭金丁运玲
Owner DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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