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Positive electrode for ultrafast charging lithium ion battery and a preparation method and application thereof

A lithium-ion battery and positive electrode technology, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve problems such as low cost, high production cost, and low safety factor, and achieve high safety, low cost, and power The effect of increasing density

Active Publication Date: 2018-12-11
合盛科技(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low power density of existing lithium-ion batteries, insufficient energy density of lithium-ion capacitors, complex pre-embedded lithium process, and high production costs, and provide a low-cost, low-safety ultra-fast lithium charging Cathode for ion batteries

Method used

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  • Positive electrode for ultrafast charging lithium ion battery and a preparation method and application thereof
  • Positive electrode for ultrafast charging lithium ion battery and a preparation method and application thereof
  • Positive electrode for ultrafast charging lithium ion battery and a preparation method and application thereof

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Embodiment 1

[0033] A kind of super fast charge lithium ion battery positive pole, the material of described positive pole comprises positive pole active material, conductive agent, binding agent, and positive pole active material is nickel-cobalt lithium manganate (NCM), lithium iron phosphate (LFP), activated carbon, Lithium nickelate (Li 2 NiO 2 ), a mixture of nickel cobalt lithium manganese oxide (NCM), lithium iron phosphate (LFP), activated carbon, lithium nickel oxide (Li 2 NiO 2 ), conductive agent conductive carbon black, and binder PVDF account for 48.65%, 17.25%, 17.25%, 8.85%, 3%, and 5% of the total mass of the positive electrode material respectively. In this embodiment, the positive electrode active material must meet the following requirements: the specific capacity of lithium nickel cobalt manganese oxide ≥ 150mAh / g, the 15C rate (relative to 0.5C) ≥ 95%, the first efficiency ≥ 86%, and the D50 particle size is 6-9 μm , specific surface area≤1m 2 / g; lithium nickel co...

Embodiment 2

[0039] The difference between this embodiment and embodiment 1 is that in this embodiment, lithium nickel cobalt manganate (NCM), lithium iron phosphate (LFP), activated carbon, lithium nickelate (Li 2 NiO 2 ), the mass percent of conducting agent conductive carbon black and binding agent PVDF account for 50%, 16%, 16%, 8%, 4%, 6% of the total mass of positive electrode material respectively, and nickel cobalt lithium manganese oxide in the present embodiment The stoichiometric ratio of nickel, cobalt and manganese is 622.

Embodiment 3

[0041] The difference between this embodiment and embodiment 1 is that in this embodiment, lithium nickel cobalt manganate (NCM), lithium iron phosphate (LFP), activated carbon, lithium nickelate (Li 2 NiO 2 ), the mass percent of conducting agent conductive carbon black and binding agent PVDF account for 49%, 17%, 17%, 7%, 5%, 5% of the total mass of positive electrode material respectively, and nickel cobalt lithium manganese oxide in the present embodiment The stoichiometric ratio of nickel, cobalt and manganese is 111.

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Abstract

The invention relates to a positive electrode for an ultrafast charging lithium ion battery and a preparation method thereof, belonging to the field of lithium ion battery. The positive electrode forthe ultrafast charging lithium ion battery comprises 84 to 96 percent of positive electrode active material, 2 to 8 percent of conductive agent, 2 to 8 percent of binder, 2 to 8 percent of positive electrode active material, conductive carbon black and binder., wherein that positive electrode active material is one or more of lithium nickel cobalt manganate (NCM), lithium iron phosphate (LFP), active carbon and lithium nickel oxide (Li2NiO2). The invention fully utilizes the working intervals of different energy storage materials to maximize the balance characteristics between the capacity andthe life of the energy storage materials; No metal lithium is needed in the lithium intercalation process, which ensures the high safety and low cost of the manufacturing process of the ultrafast charging lithium ion battery.

Description

technical field [0001] The invention relates to a positive electrode for an ultra-fast charging lithium-ion battery and a preparation method thereof, as well as an ultra-fast-charging lithium-ion battery and a preparation method for the ultra-fast-charging lithium-ion battery prepared by using the electrode, belonging to the field of lithium-ion batteries. Background technique [0002] As a new energy storage device with high power density and long cycle life of electric double layer capacitors, high energy density and charge retention ability of lithium ion batteries, ultra-fast charging lithium ion batteries have become supercapacitors and lithium batteries since their birth. Key research and development directions in the field of ion batteries. In general, lithium-ion batteries use graphite-based carbon materials as the negative electrode for energy storage, and metal lithium compounds as the positive electrode for energy storage. The potential difference between the two ...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/1391H01M4/36H01M4/505H01M4/525H01M4/58H01M10/0525H01M10/0587
CPCH01M4/131H01M4/1391H01M4/364H01M4/505H01M4/525H01M4/5825H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 焦蕾胡世勇张志伟侯保辉
Owner 合盛科技(宁波)有限公司