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Lithium nickel cobalt manganese oxygen/stannic oxide composite anode material doped with metal elements and method for preparing lithium nickel cobalt manganese oxygen/stannic oxide composite anode material

A composite cathode material, lithium nickel cobalt manganese oxide technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as harsh requirements, environmental pollution, etc., and achieve the effect of low material cost, simple process flow, and improved rate performance.

Inactive Publication Date: 2012-01-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the prior art, the element-doped ternary system (Li(Ni, Co, Mn)O 2 ) It is difficult for positive electrode materials to comprehensively improve the initial discharge capacity, impedance during charge and discharge, rate performance and cycle stability under high current.
At the same time, the existing technology mostly uses the co-precipitation method to prepare positive electrode materials. During the preparation of the precursor, the control of the pH, concentration, temperature, stirring speed and other conditions of the solution is strict, which will cause environmental pollution during the preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) 0.3 mol NiO, 0.15 mol Co 2 o 3 , 0.3 mol MnO 2 , 0.52 mol Li 2 CO 3 and 0.1 mol SnCO 3 Mix and add 60mL of absolute ethanol for ball milling, the ball milling speed is 500rpm, and the ball milling time is 20h. Dry the mixed material at 70°C, then raise the temperature to 800°C at a heating rate of 5°C / min and keep it warm for 20h, then cool naturally to room temperature to prepare Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 0.9 sn 0.1 o 2 Composite cathode material;

[0057] (2) 1g Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 0.9 sn 0.1 o 2 Composite cathode material with 0.05g SnO 2 Mix, add 10mL of absolute ethanol for ball milling, the ball milling speed is 200rpm, and the ball milling time is 16h. After the mixed material was dried at 60°C, the temperature was raised to 700°C at a heating rate of 5°C / min, kept for 6 hours, and naturally cooled to room temperature to prepare Li(Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 0.9 sn 0.1 o 2 / SnO 2 Composite cathode material.

[0058]The manganese-do...

Embodiment 2

[0060] (1) 0.3 moles of NiO, 0.15 moles of Co 2 O 3 , 0.3 mol MnO 2 , 0.52 mol Li 2 CO 3 and 0.1 moles of TiO 2 Mix and add 40 mL of deionized water for ball milling, the ball milling speed is 200 rpm, and the ball milling time is 24 h. The mixed material was dried at 60 °C, then heated to 800 °C at a heating rate of 10 °C / min and kept for 20 h, and cooled to room temperature naturally to obtain Li(Ni 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Ti 0.1 O 2 composite cathode material;

[0061] (2) 1g Li (Ni 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Ti 0.1 O 2 The composite cathode material was mixed with 0.1 g SnO2, and 20 mL of deionized water was added for ball milling. The ball milling speed was 400 rpm and the ball milling time was 8 h. The mixed material was dried at 70°C, then heated to 700°C at a heating rate of 10°C / min, kept for 4 hours, and cooled to room temperature naturally to obtain Li(Ni) 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Ti 0.1 O 2 / SnO 2 Composite cathode material. The initial dischar...

Embodiment 3

[0063] (1) 0.3 moles of Ni (NO 3 ) 2 , 0.3 mol Co(NO 3 ) 2 , 0.3 mol Mn (NO 3 ) 2 , 1.05mol LiNO 3 and 0.1 mol MgCO 3 Mix and add 40 mL of acetone for ball milling, the ball milling speed is 500 rpm, and the ball milling time is 12 h. The mixed material was dried at 60 °C, then heated to 1000 °C at a heating rate of 8 °C / min and kept for 5 h, and then cooled to room temperature naturally to obtain Li(Ni 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Mg 0.1 O 2 composite cathode material;

[0064] (2) 1g Li (Ni 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Mg 0.1 O 2 Composite cathode material with 0.1g SnO 2 Mixing, adding 20 mL of acetone to carry out ball milling, the ball milling speed is 300 rpm, and the ball milling time is 10 h. After drying the mixed materials at 70 °C, the temperature was raised to 1000 °C at a heating rate of 10 °C / min, kept for 4 h, and then naturally cooled to room temperature to obtain Li(Ni) 1 / 3 Co 1 / 3 Mn 1 / 3 ) 0.9 Mg 0.1 O 2 / SnO 2 Composite cathode material. The...

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PUM

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Abstract

The invention relates to the technical field of electrode materials of lithium ion batteries and preparation of the electrode materials, in particular to a lithium nickel cobalt manganese oxygen / stannic oxide composite anode material doped with metal elements and a method for preparing the lithium nickel cobalt manganese oxygen / stannic oxide composite anode material. The lithium nickel cobalt manganese oxygen / stannic oxide composite anode material doped with the metal elements is expressed by LiNixCoyMnzRzO2 / SnO2 and obtained by performing high-temperature solid-phase reaction on nickel, cobalt and manganese compounds, lithium salt, doped metal compounds and stannic compounds. By doping the metal elements and coating the stannic oxide, the initial discharge capacity, multiplying power performance and cycle stability of the material can be effectively improved. The material is prepared by using all-solid-phase reaction, and the process is simple in flow and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery electrode materials and preparation thereof, in particular to a lithium-nickel-cobalt-manganese-oxygen / tin oxide composite cathode material doped with metal elements and a preparation method thereof. Background technique [0002] Lithium-ion battery is a commercial rechargeable battery developed in the past two decades, which mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. Due to its high energy density, long cycle life, and environmental friendliness, it has gradually replaced traditional lead-acid batteries, nickel-metal hydride batteries, etc., and is widely used in mobile phones, digital cameras, notebook computers and other portable electronic equipment and power tools. , electric vehicles, etc. supporting power supply. Lithium-ion batteries are mainly composed of cathode materials, separators, anode materials and e...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/48
CPCY02E60/12Y02E60/10
Inventor 谭强强邱琳琳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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