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High-voltage positive electrode material precursor, lithium battery positive electrode material prepared therefrom, and preparation method

A positive electrode material and precursor technology, applied in the field of lithium-ion battery electrode materials, to achieve high volume specific energy, low-cost competitive advantage, and improve the effect of surface state

Active Publication Date: 2015-11-18
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many industrial applications of lithium nickel cobalt manganese oxide in China, especially in the field of power supply applications for portable electronic devices. The industrial application defects of lithium nickel cobalt manganese oxide still need to be overcome

Method used

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  • High-voltage positive electrode material precursor, lithium battery positive electrode material prepared therefrom, and preparation method
  • High-voltage positive electrode material precursor, lithium battery positive electrode material prepared therefrom, and preparation method
  • High-voltage positive electrode material precursor, lithium battery positive electrode material prepared therefrom, and preparation method

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Embodiment 2

[0040] Add 15L of deionized water, turn on the stirring paddle, and heat to 45-47°C to prepare 200L of a feed solution with a total concentration of nickel-manganese-cobalt of 1.8mol / L and a ratio of nickel-manganese-cobalt of 6:2:2. Add 10L of 170g / L ammonia solution to the prepared feed solution to obtain a mixed solution, and simultaneously pass the mixed solution and 9mol / L sodium hydroxide solution into the reactor for reaction, and control the pH value in the reactor to 10.5 ~11.0, the reaction temperature is 45~47℃.

[0041] After feeding the feed liquid, continue to raise the pH to 12.5 by sodium hydroxide solution, keep it warm at 85-95°C and age for 24 hours. The obtained product is subjected to solid-liquid separation, and the solid product is washed with deionized water to The pH value is 7.5, and the washed product is dried in a dryer at 80-120°C to obtain the molecular formula Co 0.2 mn 0.2 Ni 0.6 (OH) 2 Nickel-based material with a large primary particle siz...

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Abstract

The present invention discloses a high voltage positive electrode material precursor, a nickel base material prepared from the high voltage positive electrode material precursor, and preparation methods of the high voltage positive electrode material precursor and the nickel base material. The precursor preparation method comprises: preparing Ni ions, Co ions and Mn ions into a first mixed solution with the total ion concentration of 1.5-1.8 mol / L, preparing a sodium hydroxide solution with a concentration of 9-10 mol / L as a second mixed solution, preparing ammonia water with a concentration of 130-170 g / L as a third mixed solution, introducing the three mixed solutions into a reaction container, carrying out constant temperature aging after completing the reaction, and carrying out centrifugation, washing, drying and crushing on the material to obtain a Co0.2Mn0.2Ni0.6(OH)2 precursor, wherein the prepared precursor and lithium carbonate are sintered to form a nickel base material LiCo0.2Mn0.2Ni0.6O2. The prepared material has characteristics of high volumetric specific energy and lithium nickelate sintering cost reducing, and further has characteristics of high thermal stability and long cycle life under a high voltage charging condition compared with lithium nickelate.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery electrode materials, in particular to a high-voltage cathode material precursor of a lithium battery cathode, a lithium battery cathode material prepared therefrom, and a preparation method. Background technique [0002] The power supply of portable electronic equipment, with the rapid development and progress of modern science and technology and people's requirements for the use of portable electronic equipment, is developing towards the trend of high efficiency, small size, light weight, thin shape and flexible diversification. This leads to new requirements for power supply materials for portable electronic equipment, and also brings huge market prospects for new portable electronic equipment power supplies and portable electronic equipment that meet the new requirements. [0003] Since lithium-ion batteries were put into large-scale industrial applications, lithium cobalt oxide cathode mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122Y02E60/10
Inventor 陈明峰张世龙
Owner NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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