Positive electrode material for lithium ion battery, preparation method and application of positive electrode material, and battery

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as high production costs of lithium-ion batteries, performance comparison of aqueous lithium-ion batteries, and difficulties in manufacturing large-scale energy storage systems

Active Publication Date: 2020-03-24
REHAB QINGDAO ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the anhydrous process and safety management required to use flammable electrolytes also contribute to the high production cost of lithium-ion batteries at present, and also bring more difficulties to the manufacture of large-scale energy storage systems.
Although the above problems can be alleviated to some extent by using the system of aqueous lithium-ion batteries, the performance of aqueous lithium-ion batteries is still difficult to compare with lithium-ion batteries using non-aqueous electrolyte systems.

Method used

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  • Positive electrode material for lithium ion battery, preparation method and application of positive electrode material, and battery
  • Positive electrode material for lithium ion battery, preparation method and application of positive electrode material, and battery
  • Positive electrode material for lithium ion battery, preparation method and application of positive electrode material, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Preparation of cLMO-scMO based on Mn element

[0043] In this step, cLMO material is provided first. The synthesis of cLMO can be carried out by a hydrothermal method commonly used in the art. Using a low-energy ball mill (Fritsch Pulverisett 7), 5 g of cLMO (LiMn 2 o 4 ), 0.2mol / L Na 2 S 2 o 8The aqueous solution and 15 g of zirconia / stainless steel mixed ball milling beads of different sizes were placed in a ceramic container, and the total milling time was 7 hours (1200 rpm). Every 1 hour, temporarily stop the ball milling process, remove the container from the mill and place it in an ice bath for 30 minutes. Carefully transfer solids adhering to the inner walls of the vessel into the liquid phase using a spatula to ensure that all particles in the ice bath are cooled at the same temperature. After cooling, the container was returned to the ball mill and ball milling was continued for 1 hour. After a total grinding time of 7 hours, the mixture in th...

Embodiment 2

[0044] Example 2 Preparation of cLMO-scMO based on Co element

[0045] The rest of the steps are basically the same as in Example 1, the difference is that LiCoO is used 2 is cLMO (cLCO), and finally obtains crystalline LiCoO 2 / semicrystalline Co 2 o 3 structured cathode particles.

Embodiment 3

[0046] Example 3 Preparation of HP-cLMO-scMO with hierarchical pore size distribution

[0047] 0.158g KMnO 4 Added to 20ml deionized water, stirred for 2h. Then add 0.084g LiOH and 1ml ethanol, stir for 1h. Finally, the solution was transferred to a 30ml reactor, and after hydrothermal reaction at 180°C for 7h, the solid was collected and dried at 60°C to obtain LMO particles with hierarchical pore size distribution. The low-temperature liquid phase ball milling treatment was the same as in Example 1 to obtain HP-cLMO-scMO.

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Abstract

The invention provides a positive electrode material of a lithium ion battery, a preparation method and application of the positive electrode material and the battery. The positive electrode materialincludes positive electrode particles containing a lithium oxide, the positive electrode particles having a crystallized LiMxOy compound and a quasi-crystallized M element oxide in contact with each other, 0 <x <= 2, 0 < y <= 4, and M includes at least one of Mn, Al, Nb, Fe, Co, and Ni. The lithium ion battery using the positive electrode material can have considerable battery capacity and performance, and the positive electrode material can be applied to an aqueous electrolyte, so that the safety performance of the battery using the positive electrode material can be improved.

Description

technical field [0001] The present invention relates to the fields of materials and new energy sources, in particular, the present invention relates to positive electrode materials for lithium-ion batteries, preparation methods and uses, and batteries. Background technique [0002] Low-cost and environmentally friendly energy storage devices are playing an increasingly important role in the widespread utilization of renewable energy [. Although Li + Intercalation batteries (lithium-ion batteries) have been successfully commercialized at present, but they still face many challenges: for example, when applied to grid-scale storage systems and electric vehicles, the performance of batteries is still difficult to meet the requirements of this application scenario. need. Most of the above problems are related to the highly flammable ester solvents and thermally unstable lithium salts in the non-aqueous electrolytes used in current lithium-ion batteries. In addition, the anhydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 支键陈璞
Owner REHAB QINGDAO ENERGY TECH CO LTD
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