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(LMO-NCM-AC)/(LTO-AC) hybrid battery capacitor electrode material and electrode sheets

A technology of LTO-AC and hybrid battery, which is applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of unimproved rate performance, short battery cycle life, high electronic conductivity, etc., to improve rate performance and overcharge safety performance, and improve single performance , Improve the effect of slurry dispersion

Active Publication Date: 2016-04-20
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But LiMn 2 o 4 Due to the Jahn-Teller effect and manganese dissolution, the battery cycle life is short, the high temperature performance is poor, and the specific capacity is low. The general reversible capacity is only 110mAh / g
The layered nickel-cobalt-manganese ternary materials have higher capacity and good cycle performance, and the ternary layered Li[Ni-Co-Mn]O 2 (NCM) has high theoretical specific capacity, stable structure, good thermal stability, good cycle performance, high electronic conductivity, and low cost, but the rate performance needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 83% of LMO-NCM (the mass ratio of LMO to NCM is 5:5), 4% of activated carbon, 4% of conductive carbon black, 2% of carbon nanotubes, and 7% of LA132 in pure water. Stir at high speed for 2h at 6000r / min to prepare positive electrode slurry. Then, a coating device is used to uniformly coat the positive electrode slurry on both sides of the current collector aluminum foil, and the positive electrode sheet is obtained after drying, rolling, and slitting. The thickness of the positive electrode material on one side is 117 μm.

[0033] Dissolve 83% of LTO, 4% of activated carbon, 4% of conductive carbon black, 2% of carbon nanotubes, and 7% of LA132 in pure water, and stir at high speed for 2h at a stirring speed of 6000r / min to make a negative electrode Slurry. Then, a coating device is used to uniformly coat the negative electrode slurry on both sides of the current collector aluminum foil, and the negative electrode sheet is obtained after drying, rolling, and slit...

Embodiment 2

[0036] Dissolve 80% of LMO-NCM (the mass ratio of LMO to NCM is 3:7), 6% of activated carbon, 4% of conductive graphite, 3% of carbon nanotubes, 2% of LA132, and 3.5% of gelatin. In the water, high-speed stirring is performed for 1 hour at a stirring speed of 6000 r / min, and 1.5% PAAS is added for high-speed stirring for 1 hour to prepare positive electrode slurry. Then, a coating device is used to uniformly coat the positive electrode slurry on both sides of the current collector aluminum foil, and the positive electrode sheet is obtained after drying, rolling, and slitting. The thickness of the positive electrode material on one side is 117 μm.

[0037] Dissolve 80% of LTO, 6% of activated carbon, 4% of conductive graphite, 3% of carbon nanotubes, 2% of LA132, 3.5% of gelatin in pure water, and carry out high-speed stirring for 1 hour at 6000r / min , And then add 1.5% PAAS for high-speed stirring for 1 hour to prepare negative electrode slurry. Then, a coating device is used to...

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Abstract

The invention relates to (LMO-NCM-AC) / (LTO-AC) hybrid battery capacitor electrode material and electrode sheets. The electrode material comprises positive electrode material and negative electrode material. The positive electrode material comprises the following components according to mass percent: 4-6% of AC, 5-8% of binder, 3-10% of conductive agent and the rest percent of LMO-NCM. The negative electrode material comprises the following components according to mass percent: 3-8% of AC, 5-8% of binder, 3-10% of conductive agent and the rest percent of LTO. The electrode sheets comprise a positive electrode sheet and a negative electrode sheet. The positive electrode sheet comprises a current collector and the positive electrode material which is formed on the surface of the current collector. The negative electrode sheet comprises a current collector and the negative electrode material which is formed on the surface of the current collector. Physical mixing is performed by utilizing LMO, NCM and other positive electrode material with complementary performance so that rate performance and overcharge safety performance can be improved, cost can be reduced and material single performance can be improved.

Description

Technical field [0001] The invention relates to a battery capacitor electrode material and electrode sheet, in particular to a (LMO-NCM-AC) / (LTO-AC) hybrid battery capacitor electrode material and electrode sheet, and belongs to the field of new energy energy storage devices. [0002] The meaning of the following expressions in the present invention is: [0003] LMO: LiMn 2 O 4 [0004] NCM: Li[Ni-Co-Mn]O 2 [0005] LTO: Li 4 Ti 5 O 12 [0006] AC: activated carbon Background technique [0007] Lithium-ion hybrid supercapacitors have the dual characteristics of lithium-ion batteries and supercapacitors. They have higher energy density than conventional supercapacitors, higher power density than lithium-ion batteries, longer life, and higher safety. They are expected to be used in electric vehicles. , Electrical equipment, military and aerospace facilities and other high-energy and high-power electronic products. [0008] Spinel Li 4 Ti 5 O 12 (LTO) The theoretical specific capacity is 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/50H01G11/34H01G11/30H01G11/28
CPCY02E60/13H01G11/50H01G11/28H01G11/30H01G11/34
Inventor 阮殿波李林艳傅冠生
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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