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High-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and preparation method thereof

A li-ni-co-mn-mo-o, lithium-ion battery technology, applied in the field of lithium-ion battery cathode materials, can solve the problems of unfavorable long-term large-scale use, use of battery materials, poor rate performance, etc., and achieve favorable Long-term large-scale use, reduction of environmental problems, and good product stability

Active Publication Date: 2020-06-12
四川新锂想能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing battery materials have poor cycle and rate performance under high cut-off voltage, which is not conducive to long-term large-scale use. The purpose is to provide a high-nickel quaternary lithium-ion battery material Li-Ni -Co-Mn-Mo-O and its preparation method to solve the problem of using battery materials

Method used

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  • High-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and preparation method thereof
  • High-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and preparation method thereof
  • High-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and preparation method thereof

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Embodiment 1

[0028] The preparation method of the quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O of the present embodiment comprises the following steps:

[0029] (1) Calculate and weigh 14.928g of nickel acetate, 3.984g of cobalt acetate, and 4.900g of manganese acetate in deionized water to form 0.8mol / L metal ion solution; at the same time, add 4.943g ammonium heptamolybdate (tetrahydrate) into a small amount of deionized water to fully dissolve;

[0030] (2) Ammonium heptamolybdate solution is beaten into the mixed solution of nickel acetate, cobalt acetate and manganese acetate with a peristaltic pump, and is configured into a quaternary metal ion solution of 0.6mol / L;

[0031] (3) 13.86g oxalic acid is added into deionized water, and is configured into a 0.6mol / L oxalic acid solution;

[0032] (4) With oxalic acid solution as the bottom liquid, add the quaternary metal ion solution to the oxalic acid solution at a rate of 7mL / min for stirring and mixing, the stirring rate ...

Embodiment 2

[0036] The preparation method of the quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O of the present embodiment comprises the following steps:

[0037] (1) Calculate and weigh 14.928g of nickel acetate, 3.735g of cobalt acetate, and 4.900g of manganese acetate in deionized water to form 0.8mol / L metal ion solution; at the same time, add 6.179g ammonium heptamolybdate (tetrahydrate) into a small amount of deionized water to fully dissolve;

[0038] (2) Ammonium heptamolybdate solution is beaten into the mixed solution of nickel acetate, cobalt acetate and manganese acetate with a peristaltic pump, and is configured into a quaternary metal ion solution of 0.6mol / L;

[0039] (3) Add 13.86g (10% excess to ensure that all metal ions are precipitated) oxalic acid into deionized water, and configure it into a 0.6mol / L oxalic acid solution;

[0040] (4) With oxalic acid solution as the bottom liquid, add the quaternary metal ion solution to the oxalic acid solution at a rate ...

Embodiment 3

[0044] (1) Calculate and weigh 14.928g of nickel acetate, 3.486g of cobalt acetate, and 4.900g of manganese acetate in deionized water to form 0.8mol / L metal ion solution; at the same time, add 7.415g ammonium heptamolybdate (tetrahydrate) into a small amount of deionized water to fully dissolve;

[0045] (2) Ammonium heptamolybdate solution is beaten into the mixed solution of nickel acetate, cobalt acetate and manganese acetate with a peristaltic pump, and is configured into a quaternary metal ion solution of 0.6mol / L;

[0046] (3) Add 13.86g (10% excess to ensure that all metal ions are precipitated) oxalic acid into deionized water, and configure it into a 0.6mol / L oxalic acid solution;

[0047] (4) With oxalic acid solution as the bottom liquid, add the quaternary metal ion solution to the oxalic acid solution at a rate of 7mL / min for stirring and mixing, the stirring rate is 550rpm, the temperature is 50°C, the pH is 6.5 (controlled by ammonia water), the reaction time ...

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Abstract

The invention discloses a high-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and a preparation method of the high-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O. When the molecular formula is LiNi0.6Co0.15Mo0.2Mo0.05O2, after 100 cycles at high cut-off voltage (4.6 V) and 1C (1C=170mA / g), not only is the capacity retention ratio high, but also the specific discharge capacity is still good when charging and discharging are carried out at the current density of 5C.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion batteries, in particular to a high-nickel quaternary lithium ion battery material Li-Ni-Co-Mn-Mo-O and a preparation method thereof. Background technique [0002] In recent years, with the increasing use of electronic products, especially the demand for high-power, high-energy and high-reliability batteries in new energy power electric vehicle battery systems, people are constantly looking for battery systems with better performance. Since the high nickel content increases the energy density of the material, the proportion of less cobalt and manganese reduces the cost of the material, making high-nickel ternary cathode materials (especially LiNi 0.6 co 0.2 mn 0.2 o 2 ) will become one of the mainstream materials for power batteries, large batteries, and energy storage batteries in the future. But LiNi 0.6 co 0.2 mn 0.2 o 2 The cycle stability and rate performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 刘磊岳波李延俊王俊安刘晶晶孙文仙焦爽张晓普
Owner 四川新锂想能源科技有限责任公司
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