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Actinic radiation and electron beam radiation curable water-based electrode binder and electrodes comprising same

A binder and solid electrode technology, applied in battery electrodes, hybrid capacitor electrodes, electrode collector coatings, etc., can solve energy inefficiency and other issues

Active Publication Date: 2018-09-04
MILTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] b) There are substantial energy inefficiencies associated with thermal drying

Method used

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  • Actinic radiation and electron beam radiation curable water-based electrode binder and electrodes comprising same
  • Actinic radiation and electron beam radiation curable water-based electrode binder and electrodes comprising same
  • Actinic radiation and electron beam radiation curable water-based electrode binder and electrodes comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] An aqueous mixture for forming the anode binder is formed. The content of the aqueous mixture is described in the table below.

[0122]

[0123]The aqueous mixture contained 18.3 wt.% of added water to aid in the dispersion of graphite. The total water in the aqueous mixture was 30.7 wt.%, since many ingredients contain water. Coatings were applied to 25 μm thick copper electrodes, dried using a hot air gun and UV cured in two passes on a Miltec conveyor at a belt speed of 100 ft / min equipped with two Miltec HPI 650 W / in lamps. The coating density is 8.3mg / cm 2 . Aqueous mixtures can be cured using electron beams rather than UV light, and the photoinitiator can be subsequently removed from the mixture.

[0124] Electrodes and coatings can be evaluated in coin cell tests using lithium metal as the counter electrode. result in Figure 5A and Figure 5B shown in . exist Figure 5A In the evaluation of , the first discharge was performed at 48mAh / g, and the firs...

Embodiment 2

[0126] An aqueous mixture for forming the anode binder is formed. The contents of the aqueous mixture are described in the table below.

[0127]

[0128] The aqueous mixture was applied to a 25 μm thick copper electrode using an RK Control-Koter (RK Print-Coat Instruments Ltd., Hertz, UK) with a #9 Meyer rod. Use hot air to dry the water in the coating. The coating was then UV cured in two passes on a Miltec conveyor with a belt speed of 100 ft / min and equipped with two Miltec HPI 650 W / in lamps. The coating density is 7.59mg / cm 2 .

[0129] Check results in Figure 6A (Voltage changes with capacity) and Figure 6B (Capacity as a function of cycle number) is shown. This battery was cycled through 40 cycles, increasing in capacity as it cycled. The current density is 30mA / g(C / 10), the cutoff is 0.001-1.5V, and the loading is 6.8mg / cm for MCMB electrode particles 2 . Use C / 10 for 3 cycles and C / 3 for the remaining cycles. As can be seen, this battery has a higher ca...

Embodiment 3

[0131] An aqueous mixture for forming the cathode binder is formed. The contents of the aqueous mixture are described in the table below.

[0132]

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Abstract

A method for making an electrode using electron beam (EB) or actinic radiation to cure an electrode binder is provided. Also disclosed is a method of mixing specific actinic radiation or EB radiation curable polymer precursors with electrode solid particles to form an aqueous mixture, applying the mixture to an electrode current collector, and subsequently applying actinic radiation or EB Radiation is applied to the current collector to cure the polymer, thereby bonding the electrode binder to the current collector. Also provided are lithium-ion accumulators, electric double-layer capacitors, and components made therefrom.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application Serial No. 61 / 824,613, filed May 17, 2013, which is incorporated herein by reference. technical field [0003] The present invention belongs to the technical field of electrodes applicable in alkaline ion secondary (rechargeable) accumulators, and in particular of lithium ion secondary accumulators, and of electric double layer capacitors and their preparation. Background technique [0004] Electrochemical devices including batteries and electric double layer capacitors (EDLCs) have now found great use in power supplies, including portable devices and auxiliary power supplies for motor vehicles. For example, lithium-ion batteries are one of the most popular types of batteries used in portable electronic devices (eg, telephones, music players, portable computers, etc.). Lithium-ion batteries have a very high energy-to-weight ratio, have no memory ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139
CPCH01G11/28H01G11/86H01M4/04H01M4/0404H01M4/139H01M4/622H01G11/48Y02T10/70Y02P70/50H01M4/0466H01M10/0525Y02E60/10Y02E60/13
Inventor J·阿诺德G·弗尔克J·法索罗
Owner MILTEC