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Metal Accumulation Inhibiting And Performance Enhancing Supplement And A System For Delivering The Supplement

a technology of metal accumulation and inhibiting and performance enhancement, which is applied in the direction of sustainable manufacturing/processing, cell components, batteries, etc., can solve the problems of reducing the effect of sb oxidation, and reducing the damage of charging current, so as to achieve superior attenuation of cumulative destructive effects, superior attenuation of sb “poisoning, and superior attenuation of gassing

Inactive Publication Date: 2014-12-04
FITTER JOHAN C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to find a way to meet or exceed the benefits of natural elastomer from Hevea brasiliensis trees, using artificial or synthetic means. This would provide equivalent or superior attenuation of Sb "poisoning" of the storage cell active surfaces, as well as superior attenuation of gassing, water consumption, self discharge and dendritic growth. It would also elevate the top of charge potential and attenuate cumulative destructive effects on the structure of the positive electrodes.

Problems solved by technology

A higher percentage Sb provides higher durability of the energy storage cells but also significantly higher water consumption.
A significant disadvantage of Pb—Sb alloy is the propensity of the Sb to be dissolved out of the support structures of the positive electrodes and to electroplate onto the active lead (Pb) of the negative electrodes, where the arriving Sb forms tiny electrolytic cells with the resident Pb.
The damaging effect of charging current has also been curtailed by imposing a limit on the maximum charging voltage.
This can have undesirable effects, including what is believed to be a buildup of permanent PbSO4 in the electrodes, making it difficult, even impossible to recharge the energy storage cells, when the cells have been used infrequently.
In fact, efforts to identify any particular compound associated with natural thermoset elastomer have not been successful.
This document seeks to obtain the advantages of natural thermoset elastomer by blending natural thermoset elastomer with polyethylene, with some limited success.
These attempts have resulted in short lived activity and / or deleterious voltage effects .
A significant disadvantage of the elastomer is its procurement cost, currently 3 to 4 times higher than articles made for example from polyethylene and polyvinyl chloride plastics.
Another is that natural thermoset elastomer products can be inconsistent in their activity, as the chemical composition can vary in accordance with the natural variations that can occur during the growth cycle.

Method used

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  • Metal Accumulation Inhibiting And Performance Enhancing Supplement And A System For Delivering The Supplement
  • Metal Accumulation Inhibiting And Performance Enhancing Supplement And A System For Delivering The Supplement
  • Metal Accumulation Inhibiting And Performance Enhancing Supplement And A System For Delivering The Supplement

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0067]Electrodes 22 and 24 were each constructed of 500 millimeter lengths of the same type of Sn wire as the negative electrodes 26 and 28, suitably coiled to save space. The electrolyte 18 procured and prepared in accordance with the extraction, soaking and foam testing procedure described above and consequently including supplement from a suitable supplement-containing sample. Cell 14 received a 100 milliliter portion of this electrolyte which was originally drawn from the container and cell 18 received 100 milliliters of electrolyte drawn directly from the container. After five hours at 50 milliamps, electrode 26 had received a transparent haze of grayish metal and electrode 28 had accumulated a pine tree shaped tangled growth of metal crystals.

example 2

[0068]The electrodes 22 and 24 were each constructed of coils of Sn wire, substantially identical to the electrodes 22 and 24 per Example 1. Preparation of the electrolytes 18 and 20 for use in this example produced and prepared in accordance with the extraction, soaking and foam testing procedure employed for Example 1, except, instead of a supplement-containing sample, high porosity insulating sheet containing Hevea brasiliensis natural elastomer of the type used to provide separation between energy storage cell electrodes was extracted, soaked, foamed and the electrolyte therefrom used. After five hours at 50 milliamps, electrode 26 had received a transparent haze of grayish metal and electrode 28 had accumulated a pine tree shaped growth of metal crystals.

example 3

[0069]The electrodes 22 and 24 were each constructed using 5 grams of Sb metal powder lightly compacted into a small finely woven polyester fabric cylindrical holder, the holder previously fitted with a full length and base width inboard strip conductor made of pure Pb. The Pb conductor of electrode 22 connected to conductor 34 and the Pb conductor of electrode 24 connected to conductor 38. The supplement was prepared by dissolving 0.5 milliliters of [CH3(CH2)x][(OCH2CH2)6][(OCH2CHCH3)3]OH, (x ranging from 7 to 15 and including isomers), in 99 milliliters of water, then transferring a 1 milliliter portion thereof into cell 14. Cell 16 received 1 milliliter of plain water. Electrolytes 18 and 20 were poured into cells 14 and 16 thereafter. The electrolyte 18 supplement concentration estimated at 50 vol parts per million. After five hours at 50 milliamps, electrode 26 acquired a barely perceptible coating, and retained most of its original bright Sn metallic luster, while electrode 28...

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Abstract

The invention relates to a metal accumulation inhibiting and performance enhancing isolated or synthesized supplement for use in or in association with rechargeable electrochemical energy storage cells, and a system for delivering the supplement including articles of plastic, articles containing plastic, articles similar to plastic, plastic containers, apparatus, porous electrodes, liquids and electrolytes, in particular, articles, apparatus, electrodes, insolating sheets, liquids and electrolytes associated with rechargeable electrochemical energy storage cells incorporating one or more supplements. An effective amount of the supplement typically exhibits foaming of an electrolyte, providing a visual indicator of activity in attenuating metal deposition on, and thereby reducing metal accumulation on, various surfaces in the rechargeable electrochemical storage cell.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority in U.S. Provisional Patent application No. 61 / 829,517, filed 31 May, 2013.FIELD OF THE INVENTION[0002]The invention relates to a metal accumulation inhibiting and performance enhancing supplement, and a system for delivering the supplement. The invention includes supplemented articles of plastic, articles containing plastic, articles similar to plastic, plastic containers, apparatus, porous electrodes, liquids and electrolytes, for use in or in association with rechargeable electrochemical energy storage cells, in particular, articles, apparatus, electrodes, liquids and electrolytes incorporating one or more supplements. The supplements of the invention are characterized by a facility to engender foaming of electrolytes as a visual indicator of activity in attenuating metal deposition on and thereby reducing metal accumulation on various surfaces in the storage cell, such as at negative electrodes thereof....

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M2/16B29C31/00H01M2/14H01M50/417
CPCH01M2/1653B29C31/00H01M2/145H01M10/4235H01M2300/0005Y02E60/10Y02P70/50H01M50/417H01M50/116H01M50/449H01M50/411H01M10/08H01M10/12H01M2220/20H01M2300/0011
Inventor FITTER, JOHAN C.
Owner FITTER JOHAN C