Lithium-substituted magnesium ferrite material based hydroelectric cell and process for preparation thereof

Patent metadata

Field	Value
Publication number	US-2016285121-A1
Application number	US-201615067496-A
Country	US
Kind code	A1
Filing date	Mar 11, 2016
Priority date	Mar 23, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

The present invention describes a lithium- substituted magnesium ferrite material based hydroelectric cell and process for preparation thereof. A novel galvanic cell process of generating electric current in distilled water by lithium substituted magnesium ferrite hydroelectric cell has been developed. A synthesis process of ferrite pellet having zinc anode and silver inert electrode has been developed. The material splits water molecules and conducts ions within porous ferrite. Spitted ions electrochemically react with electrodes and forms zinc hydroxide at anode and hydrogen gas at silver electrode. This hydroelectric cell has generated 5 mA short circuit current and 950 MV open cell voltage. Current increased to 20 mA by thermally deposited Zn electrode on ferrite pellet. It is entirely a new method from galvanic cell existing since eighteenth century primary cells such as Daniel, Leclanche and Edison primary cell etc. Processing of the cell is very economical and highly sensitive towards electrolysis of water molecules. It is a green source for producing energy and has a potential to excel from existing electrochemical batteries.

First claim

We Claim:

1 . A lithium substituted magnesium ferrite material useful for hydroelectric cell comprising of magnesium carbonates, lithium carbonates and iron oxide in the molar ratio in the range of 0.75 to 0.85: 0.05 to 0.15:0.95 to 1.05, with porosity in the range of 32-38% and grain size in the range of 50-800 nm.

2 . A lithium substituted magnesium ferrite material as claimed in claim 1 , wherein the molar ratio of magnesium carbonates, lithium carbonates and iron oxide is 0.8:0.1:1.

3 . A hydroelectric cell using lithium substituted magnesium ferrite material, consisting of three parts, i) lithium-substituted magnesium ferrite material comprising of magnesium carbonates, lithium carbonates and iron oxide in the molar ratio in the range of 0.75 to 0.85:0.05 to 0.15:0.95 to 1.05, with porosity in the range of 32-38% and grain size in the range of 50-800 nm, ( 2 ), ii) Zinc plate stick on the one side of said material as anode ( 3 ), and iii) comb electrodes of silver deposited by radio frequency sputtering as inert electrode on other side of material ( 1 ), dipping said hydroelectric cell in water to generate stable electric current in the range of 5 to 0.3 mA and voltage in the range of 950-800 mV for a period in the range of 0.17 to 380 hrs.

4 . A hydroelectric cell as claimed in claim 3 , wherein cell generates by-products zinc hydroxides on zinc electrode and hydrogen gas on silver electrode.

5 . A hydroelectric cell as claimed in claim 3 , wherein the lithium substituted magnesium ferrite material is square dimension 24×24 mm with applied pressure 10 ton.

6 . A hydroelectric cell as claimed in claim 3 , wherein water is deionized, distilled or sea water, preferably deionized or distilled water.

7 . A hydroelectric cell as claimed in claim 3 , wherein three cells of 24 mm ×24 mm size connected in series and dipped in water lights up six LEDs for a period of 9 to 10 days.

8 . A process for preparation of lithium-substituted magnesium ferrite hydroelectric cell, comprising the steps of
i) wet grinding powder of carbonates of Mg and Li and oxide of iron in a molar ratio in the range of 0.75 to 0.85:0.05 to 0.15:0.95 to 1.05 with acetone for a period of 50 to 70 minutes to obtain homogenized powder, ii) presintering with ramp rate of 5° C./min the homogenized powder of step i) at a temperature in the range of 750 to 850° C. for a period in the range of 7 to 9 hrs, iii) grinding the said presintered powder of step ii) for a period of 50 to 70 minutes and forming square pellets, iv) sintering the square pellets of step iii)at a temperature in the range of 1000-1100° C. with ramp rate of 5° C./min for a period of 4 to 6 hrs, v) processing silver comb electrode on one side of square pellets of step iv) by radio frequency sputtering at 70 to 80 watt for a period m the range of 25 to 35 mins, vi) sticking zinc plate electrode on other side square pellet of step v) to obtain lithium-substituted magnesium square ferrite pellets based hydroelectric cell.

9 . A process as claimed in claim 8 , wherein preferable presintering temperature is 800° C. and time is 8 hrs in step ii) and sintering temperature is 1000° C. and time period 5 hrs in step iv).

10 . A process as claimed in claim 8 , wherein acetone to mixed powder ratio in step i) is 1:1 by vol/wt.

Assignees

• Council Scient Ind Res

Inventors

• Kotnala Ravinder Kumar
• Shah Jyoti

Classifications

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title

• H01M8/1016 Primary

  characterised by the electrolyte material (H01M8/12 takes precedence) · CPC title

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M8/1009

  with one of the reactants being liquid, solid or liquid-charged (H01M8/12 takes precedence) · CPC title

• H01M2300/0071

  Oxides · CPC title