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Preparation method of lithium ion battery positive electrode material LiCoO2 with improved potential

A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as increased energy density, and achieve the effects of smooth surface, high compaction density, and excellent comprehensive electrochemical performance.

Inactive Publication Date: 2013-02-27
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

Everyone knows that the current lithium ion cathode material lithium cobalt oxide has a potential of only about 4.0v to lithium, while the working voltage is only between 3.0~4.2v, and the specific energy of the full battery is only 140~145mAh / g. Even if it is increased by 0.1v, the energy density will also increase. increase by 10%

Method used

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  • Preparation method of lithium ion battery positive electrode material LiCoO2 with improved potential
  • Preparation method of lithium ion battery positive electrode material LiCoO2 with improved potential
  • Preparation method of lithium ion battery positive electrode material LiCoO2 with improved potential

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Embodiment 1

[0021] Embodiment 1: a kind of preparation method that improves lithium-ion battery cathode material LiCoO Potential, it is characterized in that: complete according to the following steps:

[0022] 1. Select battery-grade lithium carbonate from Sichuan Tianqi Lithium Industry Co., Ltd. and GB-100 model cobalt tetroxide from Ningbo Kebot Cobalt and Nickel Co., Ltd. as raw materials, and mix according to the molar ratio of lithium to cobalt 1.035:1. Add TiO 2 , ZrO 2 and Nb 2 o 5 As additive T1, where TiO 2 The added weight is 0.12% of the weight of tricobalt tetroxide, ZrO 2 The added weight is 0.1% of the weight of tricobalt tetroxide, Nb 2 o 5 The added weight of is 0.15% of the weight of tricobalt tetroxide. The battery-grade lithium carbonate, GB-100 model cobalt tetroxide, TiO 2 , ZrO 2 and Nb 2 o 5 Perform doping and mixing, and mix well.

[0023] 2. Put the homogeneously mixed material obtained in 1) into a refractory sagger, push it into a high-temperature ...

Embodiment 2

[0028] Embodiment 2: a kind of preparation method that improves lithium-ion battery cathode material LiCoO Potential, it is characterized in that: complete according to the following steps:

[0029] 1. Select battery-grade lithium carbonate from Sichuan Tianqi Lithium Industry Co., Ltd. and GB-100 model cobalt tetroxide from Ningbo Kebot Cobalt Nickel Co., Ltd. as raw materials, and mix according to the molar ratio of lithium to cobalt 1.05:1. Add TiO 2 , CeO 2 and Nb 2 o 5 As additive T1, where TiO 2 The added weight is 0.12% of the weight of tricobalt tetroxide, CeO 2 The added weight is 0.15% of the weight of tricobalt tetroxide, Nb 2 o 5 The added weight is 0.1% of the weight of tricobalt tetroxide. The battery-grade lithium carbonate, GB-100 model cobalt tetroxide, TiO 2 , CeO 2 and Nb 2 o 5 Perform doping and mixing, and mix well.

[0030] 2. Put the homogeneously mixed material obtained in 1) into a refractory sagger, push it into a high-temperature pusher k...

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Abstract

A preparation method of a lithium ion battery positive electrode material lithium cobalt oxide with improved potential. The method comprises the following steps: mixing of cobaltosic oxide and lithium salt and addition of an additive T1, pretreatment, high temperature one-time sintering, surface treatment, secondary mixing, pretreatment, low temperature double sintering and surface treatment, so as to obtain the product. The lithium cobalt oxide produced by the process not only has the original properties, but also can realize 4.4V charging and discharging. The product has been used by customers; and the customers produce the material into a battery product for testing with test current ratio of 0.2C and the discharge voltage in the range of 3.0V-4.35V; and the material is measured to have capacity higher than 160mAh / g and capacity retention rate of higher than 99.5% after 10 times of charging by 1C / discharging by 1C.

Description

technical field [0001] The invention relates to a preparation method for improving the potential of lithium cobalt oxide, a cathode material of a lithium ion battery, and belongs to the technical field of new energy and high efficiency and energy saving-new high-efficiency energy conversion and storage technology and preparation of related products. Background technique [0002] Lithium batteries are mainly composed of positive electrode materials, negative electrode materials, separators and electrolytes, etc. The positive electrode materials account for more than 40% of the total cost of lithium batteries, and the performance of positive electrode materials directly affects the various performance indicators of lithium batteries, so Lithium battery cathode materials occupy a core position in lithium batteries. At present, lithium battery cathode materials that have been marketed include lithium cobaltate, multi-component materials, lithium manganate and lithium iron phosph...

Claims

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Application Information

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IPC IPC(8): H01M4/525
CPCY02E60/122Y02E60/10
Inventor 陈军黄兵
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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