Lithium ion cell blended positive pole material and its preparing method

A lithium-ion battery and cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor stability, technical difficulty, low stability and safety performance, and achieve high working voltage, good safety performance, and automatic The effect of small discharge

Inactive Publication Date: 2007-08-08
济宁市无界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Lithium nickel cobalt oxide" has a higher capacity than lithium cobalt oxide and lithium manganese oxide, and its synthesis is relatively easy, but its stability and safety performance are lower than those of lithium cobalt oxide, and its voltage platform is about 0.3 volts lower than that of lithium cobalt oxide, especially for high voltage The stability is poor, and industrialization is still technically difficult

Method used

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  • Lithium ion cell blended positive pole material and its preparing method

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Effect test

Embodiment 1

[0025] Carry out specific implementation according to the composition material general formula of cobalt manganese niobium M nickel base doped positive electrode material of lithium ion battery: preparation Li 1.06 Ni 0.7 co 0.2 mn 0.04 Nb 0.05 m 0.01 o 2 , first weigh Li according to the molar ratio of Li, Ni, and Co as 1.01:0.7:0.2 2 CO 3 、Co 3 o 4 、Ni 2 o 3 1608.52g, 692.95g, and 2285.73g respectively, mixed for 1 hour with an air-jet batching device, and then sent into a negative pressure high-frequency vortex centrifugal mixing tank with a set internal pressure of 0.8 standard atmospheric pressure for 10 hours. The mixed and ground material is put into a sagger of 400mm×320mm×220mm, and then the material in the sagger is compacted and punctured. The thickness of the material after compaction and puncture is 100mm, and then sent to the atmosphere furnace for intermittent oxygen sintering , the heating rate is 500°C / h, rise to 760°C and enter the first constant t...

Embodiment 2

[0027] Preparation of Li 1.06 Ni 0.8 co 0.12 mn 0.02 Nb 0.05 m 0.01 o 2 : First, according to the molar ratio of Li, Ni and Co as 1.08:0.8:0.12, weigh Li 2 CO 3 、Co 3 o 4 、Ni 2 o 3 , mixed for 1 hour with an air-spray batching equipment, then sent into a negative pressure high-frequency vortex centrifugal mixing tank with a set internal pressure of 0.8 standard atmospheric pressure for 10 hours of mixing and grinding, and the mixed grinding material was packed into a 400mm (long ) × 320mm (width) × 220mm (height) sagger, the material in the sagger is compacted and punched, the compacted thickness is 100mm, and then sent into the atmosphere furnace, the speed of intermittent oxygen sintering is 400 ℃ / h , rise to 700°C and enter the first constant temperature zone, the constant temperature time is 5h, and then enter the second constant temperature zone, the temperature in the second constant temperature zone is controlled at 800°C, the constant temperature time is 6...

Embodiment 3

[0029] Preparation of Li 1.06 Ni 0.5 co 0.2 mn 0.19 Nb M.1 m 0.01 o 2 : First, weigh Li according to the molar ratio of Li, Ni and Co as 1.01:0.5:0.2. 2 CO 3 、Co 3 o 4 、Ni 2 o 3 , mixed for 1 hour with an air-spray batching equipment, then sent into a negative pressure high-frequency vortex centrifugal mixing tank with a set internal pressure of 0.8 standard atmospheric pressure for 10 hours of mixing and grinding, and the mixed grinding materials were put into a sagger, The material in the sagger is then compacted and punched. The thickness of the material after compacting and punching is 100mm, and then sent to the atmosphere furnace for intermittent oxygen sintering. The heating rate is 300°C / h, rising to 750°C and entering the first Constant temperature zone, the constant temperature time is 6h, and then enter the second constant temperature zone, the temperature in the second constant temperature zone is controlled at 890°C, the constant temperature time is 8h,...

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Abstract

The present invention relates to blended positive pole material for lithium ion cell and is preparation process. The material has the general expression of LixNi1-y-z-i-jCoyMnzNbiMjO2, where x is 0.8-1.5, y is 0-0.3, z is 0-0.5, i is 0-0.1, j is 0-0.1, and M expresses one or several of Mo, Sr, W, V, Cu, Ti and Ba. The preparation process includes mixing lithium compound, cobalt compound and nickel compound in a jetting mixer; mixing and grinding in a HF vortex centrifugal mixing and grinding pot, densifying, roasting at 600-1000deg.c for 10-30 hr white introducing oxygen intermittently, cooling naturally to obtain intermediate, crushing, grinding, HF vortex centrifugal mixing and grinding together with Li, Mn, Nb and M compounds, densifying, roasting at500-900deg.c for 4-30 hr white introducing oxygen intermittently, and grinding to obtain target product. The positive pole material has high purity, high crystallization degree, high electricity accumulating capacity and other features.

Description

Technical field: [0001] The invention relates to a lithium ion battery doped cathode material and a preparation method thereof. Background technique: [0002] At present, most of the anode materials for commercial lithium-ion secondary batteries are "lithium cobalt oxide" (LiCoO 2 ), its specific capacity is low, about 130mAh / g, and it needs to bear the irreversible capacity loss of the negative electrode, so its performance has almost no room for development. Due to the lack of cobalt resources and high price, and with the increase of monomer capacity, safety has become the main problem of "lithium cobalt oxide" batteries. These defects limit its further promotion. Therefore, the research and improvement of positive electrode materials has always been a key issue in the research of lithium ion secondary battery materials. On the whole, the development of a new generation of battery cathode materials is imminent. [0003] At present, in order to improve battery performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/00H01M4/48H01M4/505H01M4/525
CPCY02E60/12Y02E60/10
Inventor 胡晓宏王世宏蒋永善贺兆书彭兆花李俊峰王习志
Owner 济宁市无界科技有限公司
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