Preparation method of nickel cobalt aluminum lithium battery positive electrode material and lithium battery positive electrode material

A cathode material, lithium battery technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of low compaction density of nickel-cobalt-aluminum lithium battery cathode materials, and achieve easy industrialization promotion and production control, anti-fading Strong, strong structure

Active Publication Date: 2018-01-19
BEIJING NAT BATTERY TECH
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Problems solved by technology

[0004] The present invention proposes a method for preparing a cathode material of a nickel-cobalt-aluminum-lithium battery, a cathode material for a lithium battery, and a lithium-ion battery, so as to improve the anode material for a cathode material for a lithium-cobalt nickel battery obtained by an existing preparation method for an anode material for a lithium-cobalt nickel battery The problem of low compaction density

Method used

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  • Preparation method of nickel cobalt aluminum lithium battery positive electrode material and lithium battery positive electrode material
  • Preparation method of nickel cobalt aluminum lithium battery positive electrode material and lithium battery positive electrode material
  • Preparation method of nickel cobalt aluminum lithium battery positive electrode material and lithium battery positive electrode material

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preparation example Construction

[0023] In the preferred technical scheme of the present invention, the nickel-cobalt-aluminum Li(Ni 0.8 co 0.15 al 0.05 )O 2 The preparation method of cathode material comprises the following steps (see figure 1 ):

[0024] Step 1: put (Ni 0.8 co 0.15 al 0.05 )(OH) 2 with Li 2 CO 3 The two materials are mixed evenly according to the M / Li molar ratio of 1:1.02~1:1.03, where M means (Ni 0.8 co 0.15 al 0.05 )(OH) 2 ;

[0025] Step 2: (Ni 0.8 co 0.15 al 0.05 )(OH) 2 with Li 2 CO 3 The material is calcined in a kiln to prepare the lithium battery positive electrode material.

[0026] In addition, in addition to including (Ni 0.8 co 0.15 al 0.05 )(OH) 2 with Li 2 CO 3 In addition to materials, it also includes Li(Ni 0.8 co 0.15 al 0.05 )O 2 The primary particle growth effect and the trace doping elements affected by the degree of compactness between primary particles.

[0027] Preferably, the doping element is Ti, M g , the blending amount accounts fo...

Embodiment 1

[0035] According to the molar ratio of M / Li 1:1.02, the nickel-cobalt-aluminum (Ni 0.8 co 0.15 al 0.05 )(OH) 2 Hydroxide and Li 2 CO 3 , (Ni 0.8 co 0.15 al 0.05 )(OH) 2 D50 of 9.6 µm, Li 2 CO 3 The D50 is 5.2 microns, (Ni 0.8 co 0.15 al 0.05 )(OH) 2 Hydroxide and Li 2 CO 3 Mix evenly in a high-mixer first, then put it into a kiln for sintering, raise it to 950°C at 3°C / min, adjust the atmosphere during the sintering process, keep it warm for 12 hours, and then cool with the furnace. The sintered material is sieved to obtain this product. The cathode composite material in the invention (see figure 2 ).

[0036] The cathode material of this example, the binder PVDF, the solvent NMP and the conductive agent were stirred evenly to prepare the cathode slurry, and the cathode slurry was uniformly coated on both sides of the aluminum foil, rolled and cut to obtain the cathode sheet. Test the maximum compaction density of the positive electrode sheet. Using artific...

Embodiment 2

[0038] Weigh M according to the molar ratio of M / Li 1:1.03 g Nickel-cobalt-aluminum (Ni 0.8 co 0.15 al 0.05 )(OH) 2 Hydroxide and Li 2 CO 3 , (Ni 0.8 co 0.15 al 0.05 )(OH) 2 D50 of 9.6 µm, Li 2 CO 3 The D50 is 5.2 microns, (Ni 0.8 co 0.15 al 0.05 )(OH) 2 Hydroxide and Li 2 CO 3 Mix evenly in a high-mixer first, then put it into a kiln for sintering, raise it to 950°C at 3°C / min, adjust the atmosphere during the sintering process, keep it warm for 12 hours, and then cool with the furnace. The sintered material is sieved to obtain this product. The cathode composite material in the invention.

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Abstract

The present invention relates to a nickel-cobalt-aluminum lithium battery positive electrode material preparation method and a lithium battery positive electrode material. The method is a high-capability and high-compaction nickel-cobalt-aluminum Li(Ni0.8Co0.15Al0.05)O2 positive electrode material preparation method, particular a primary particle enlargement nickel-cobalt-aluminum positive electrode material Li(Ni0.8Co0.15Al0.05)O2 preparation method, and comprises: 1, uniformly mixing a precursor material (Ni0.8Co0.15Al0.05)(OH)2 and Li2CO3 according to a M / Li molar ratio of 1:1.02-1:1.03, wherein M represents (Ni0.8Co0.15Al0.05)(OH)2; and 2, calcining the uniformly-mixed material obtained in the step 1 in a furnace kiln to prepare the lithium battery positive electrode material. According to the present invention, the wet method technology and the fire method technology are utilized to orderly align and combine various elements such as nickel, cobalt, aluminum, doped elements and the like so as to form the solid and functionalized micro-structure and prompt the primary particle single-crystal to grow, such that the product nickel-cobalt-aluminum Li(Ni0.8Co0.15Al0.05)O2 positive electrode material of the present invention is finally obtained.

Description

technical field [0001] The invention relates to a preparation method of a nickel-cobalt-aluminum-lithium battery cathode material and the nickel-cobalt-aluminum-lithium battery cathode material. Background technique [0002] At present, commercial lithium-ion secondary batteries mainly use LiCoO 2 It is a positive electrode material, but the relatively poor cobalt element leads to high raw material costs, LiNiO 2 and LiCoO 2 With the same layered structure and abundant resources, low cost, and no environmental pollution, it is an ideal alternative to LiCoO 2 material of choice, but LiNiO 2 It is difficult to accurately control the stoichiometric ratio during the synthesis process, and the Ni 3+ has been converted to Ni 4+ It will seriously affect its cycle life, poor thermal stability, and even oxidize and decompose the electrolyte to bring safety hazards. Studies have shown that the incorporation of Co elements can improve the LiNiO 2 The stability of the structure, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525C01G51/00
CPCY02E60/10
Inventor 陈金卓郭伟慈云祥
Owner BEIJING NAT BATTERY TECH
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