Super Capacitor

Sites

Graphene Researchers Community

/r/graphene

People

Robert Murray-Smith

a

Venturestarx - Selling Graphene commericially.

Jonathan Fosdick

Mechanicus

m3sca1

The Thought Emporium

Misc

DIY a Really Good Electrolyte

Capacitive Discharge Welder

How To Make a MINI Spot Welder for Cheap / 12 V

Carbyne

How to make sodium hydroxide (lye) at home

From Lab to Fab: Pioneers in Nano-Manufacturing - New way of making a chip using a template.

Carbon Nanotubes for Digital Logic

Graphene Oxide

How To Make Graphene Oxide - The Tour Method - Apparently Oxide isn't needed anymore for Graphene...

Graphene

Graphene | How It's Made

Super Easy Graphene - 21 Mar 2013 - Uses graphite intercolated compound. Hydrogen peroxide.

Dissolving Graphite to get Graphene - Liquid Phase Exfoliation - 22 Jun 2013. How things dissolve. A week ago he said it's the most efficient method. Needs exfoliated/expanded graphite. It's a bowl full with 50g, it's expanded about 200 times. Uses a solvent with %90 ethatolasotate. Type 10 cleaner, 50-100ml. Uses a 50watt sonicator bath for 3 hours (just seems to be a ultrasonic cleaner?). Smells like hairs?

Graphene from table sugar - the Tang Lau Method - 21 Apr 2013. Cooks it in autoclave. Makes a small monolayer of graphene oxide, then gets heated into graphene.

"essentially you use any where between 0.05 and 0.5 M solution of sugar - fructose, sucrose, glucose they all work. You heat it from between 165 - 220 degrees centigrade in an autoclave for between 1 and 7 hours and pour it out. A graphene oxide layer will form the thickness of whic depends on the time you heat it for, the concentration of sugar and the heat of the oven. Once you have got your layer you need to anneal it at 350 degrees and exclude air by wrapping in foil of some kind. I liked the method - I just thought it was rubbish for producing larg amounts - but something to work with."

How To Make Graphene With Soap, Water And A Blender - 25 Apr 2014 - Makes soapy graphene, lower conductivity.

The Easiest Way To Make High Quality Graphene - 15 Jun 2014. Uses a solvent and a harmoniser. 13,000 RPM for 1 hour. 75% Acetone, 24% water. 40g of graphite. 100μm to 5μm, 45μm=325mesh. Then centrifuge it at 1000k rpm. Concentrated 4mg per mm.

Step by Step Method for Making Graphene - 19 Jun 2014 - Needs ultrasonicator. "Achieving concentrated graphene dispersions in water/acetone mixtures by the strategy of tailoring Hansen solubility parameters" 416.75mL of acetone 88.25mL of deionised water 1.5g 325 mesh powdered flake graphite

Graphene From Tea - 30 Sep 2014. Needs some kind of acid and homogenizer. "Silver is unexfoliated graphite.". "Blue grey liquid is graphene solution"

Graphene From Green Tea - 1 Oct 2014. He's using graphene oxide. Just needs stiring for 2 hours. Mentions "green chemistry". Only half a gram per litre ☹

Graphene exfoliated with Tea - Alternative.

Graphene from intercalated graphite part 1. Mixing. - 19 Jan 2016 - He tried a 50w ultrasonic cleaner and it didn't work. Used a blender. Needs acids. Seems to require days.

Structured Carbon Battery - An Update - Simple 3 layer battery. Also talks about binder.

Exfoliation

Graphene - A Simple Method For Mass Production - 23 Jul 2016 - From Graphite. 0.5 moller of Sodium sulfate. Stainless Steel Electrode. Needs electrolysis then sonification.

Easy Graphene Sheets-Laminator & Graphite - m3sca1. Uses a lamination. 10MΩ ☹

Pristine Exfoliation of Graphene Using Ammonium Hydroxide

Simple electro-chemical method for graphite exfoliation - 21 Aug 2016 - Confirming Robert Smith's method.

Electrochemical graphite exfoliation attempt 2 with the correct process - 22 Aug 2016

Talga Exfoliation Process - 18 Nov 2015 - "So an aqueous solution of ‎na2so4 and k2so4?" - na2so4=Sodium sulfate, k2so4=Potassium sulfate

How to tune graphene properties by introducing defects

electrochemical exfoliation H2SO4 KOH - 11th Feb 2015 - Short, talks about switching voltage.

Early Pulsed Electrolysis System Investigation - Uses a Joule Thief System.

Electrochemical Exfoliation of Graphene - Quick and Easy - Kingswell Labs. "could you use koh or something else?", "Yes, you can use any electrolyte for this method. I haven't used any other methods since I have H2SO4 on hand so I couldn't say if anything else would work better.", "Sodium sulphate"

Nanotechnology: CVD Graphene Transfer - 2mL 69% Nitric Acid to 6mL Deionized Water.

"Ammonium persulfate [NH4)2S2O8 aka PCB etcher, stainless mesh + lump of graphite worked rather too well for this experiment. I'll admit to trying fairly liquid but that was just a load of bubbles :)"

Expanded carbon

Expanding carbon from Fructose - "just do the same thing but with intercalated graphite and you are there - intercalate the graphite with sulphuric acid - then take your intercalated graphite and repeat this and it will be the Petrik method"

The Microwave Production of Expanded Graphite - Using a microwave to expand graphite produces partially-exfoliated graphene "worms" that are useful in the production of graphene and for making supercapacitor batteries. This method involves microwaving acid-treated graphite to produce expanded graphite. Acid-treated graphite can be made by soaking approximately 10 grams of ~35 mesh flake graphite in 150 mL concentrated sulfuric acid (H2SO4, 98%) together with 50 mL 70% Phosphoric acid (70%) overnight. The acid molecules are small enough to squeeze in between and intercalate the layers of graphene that make up the graphite flakes. The graphite is then placed in a acid-resistant filter paper (PE/PTFE) and washed with copious amounts of deionized (DI) or distilled water several times to remove any excess acid until the pH reaches 7 and is dried overnight or for several hours in a vacuum drier at 60-80 degrees C. The dried acid-treated graphite is then placed in a modified domestic 1000-Watt microwave oven for 1-2 minutes at a time with frequent intermissions in order to remove the expanded graphite and to rearrange the remaining unexpanded graphite. The process is repeated until all the acid-treated graphite is expanded.

Making Carbon Foam Supercapacitor Material from Sugar - used sodium carbonate instead of zinc nitrate because sodium carbonate is a lot safer and easier to get. If you want to use this stuff for supercapacitors, you will need to heat treat it to make it more conductive

Carbon Foam: an incredible material made from everyday items. - AvE burning toast.

Capacitor

A 1,700F Supercapacitor - Robert Murray-Smith capacitor main overview. Ionic fluid is better than salt water as an electrolyte.

A World First - A 10 kiloFarad Capacitor (10,000 F) - Mentions the name of the electrolytes. - 5th May 2015 (lasersaber Towards A 1 MegaFarad Super Capacitor. - Shows flip book style of commercial capacitors. - 10th May 2015

The Super Safe Megafarad capacitor - Update on the mega-farad capacitor.

How To Make A SuperCapacitor - Follow Up

How To Make A SuperCapacitor - Step By Step - Uses activated carbon, not graphene. PVA, Paper Towel. Carbon Felt. Collectors: Zinc, Magnisium. - 18 Feb 2016

Making High Performance Supercapacitor Materials - 1 - Makes carbon foam from sugar and hydrocloric acid.

Making High Performance Supercapacitor Materials - 2 - Graphine Oxide/Graphite foil. Using graaphene oxide and a candle flame to make a high performance material for supercapacitors.

a - DIY Safe, Simple, Easy Double Layer Supercapacitor

Homemade Laserscribe Graphene Supercapacitor Test

Laserscribe graphene made at home

Tic-Tac supercapacitor - 800F from the kitchen - Russian guy. Uses masic materials. Activated carbon. 6Amps ☺

Al-air battery II - car race challenge - Russian guy improved. Activated carbon. Applies a lot more pressure with a hydrolic jack and cooks it for 35min.. NaHO is pipe cleaner.

Battery

Graphene Based Energy Storage Device

How It`s Made | Duracell Batteries

a's last of batteries

Microbial

Bio Bug Cell Experiment

Microbial fuel cell - DIY Elbonian style

Rice Carbon Self Charge Cell

Build Your Own MICROBIAL FUEL CELL - Do It Yourself - Tutotrial - Buried in the ground.

How Microbial Fuel Cells Work? - Using sea water for devices at sea.

Bruce Logan | Microbial Fuel Technologies - In depth talk.

The Microbial Fuel Cell - Short technical overview. Builds a MudWatt.

How to make an Microbial Electrolysis Cell MEC ( Part 1) Best science project

MFC Architectures- Several types of microbial fuel cells - Penn State in the Logan lab.

MudWatt Microbial Fuel Cell - How It Works

http://www.instructables.com/id/How-to-Make-a-Microbial-Fuel-Cell-MFC-Using-Mud/ - MudWatt instructable.

Crystal

How to make a Crystal Battery

How to Make A Better Crystal Battery - This one is apparently non-reactive... "John Bedini's crystal battery. I use 1:3 reduced MgSO4 to Rochelle Salt ratio." MgSO4·7H2O is epsom salt, you can boil out the 7H2O (takes an hour). Uses pyrite to dope it. Polarises it with voltage on the terminal.

Crystal Battery 1 amp complete build process BackRoomLabs - Does some weird stuff with the copper...

Conductive Ink

Conductive Inks and Electronics Robert Murray-Smith

• a square of ½ oz. copper has a resistance of about 1 mΩ

Making Inks And Paints - The Basics - 12 May 2014

How To Make A Conductive Ink - 13 May 2014. Uses graphite. Copied from patent. 100g gum arabic. 500mL of water. 300g of flake graphite powder. 30-40Ω per square. Graphite "Fine flake graphite". Uses a square probe. Thicker means less resistance.

Inks Update - SWAG ink?

Super Conductive Carbon Ink - 23 Jul 2014. - 26Ω. Rubs down the printed ink with a cloth and gets 17Ω. Rubs with a spoon gets 5Ω.

Graphene Plastic/Epoxy

Super Strong Conductive Graphene Bio Plastic

How to Make / DIY, GRAPHENE / GRAPHITE PLASTIC

Self Recharging

Generating Electricity From A Coat Of Graphene Paint - Alternative Solar

Sonicator

DIY Home Made Ultra Sonic Cleaner "UNDER $35 BUCKS" - Uses a sander, does 10k rpms. *No a sonicator*.

• if you want to make a real ultrasonic device you can hack one of them pet control sonic devices to generate the frequency an hooking it up to a larger high frequency generator
• THIS IS NOT ULTRASONIC. You need much, much higher frequencies — 20 kHz to 400kHz (or 1.2 million rpm to 2.4 million rpm) to get ULTRAsonic. The higher frequency range has EVERYTHING to do with the cleaning effectivity.
• the tank needs to be metallic because the plastic absorbs the vibrations...
• there is a very good DIY on intructables made by grenoble.
• Great explanation!!! Just to expound, the "machine gun" process is called cavitation for the all my science homies in the house. Non-inertial cavitation to be more exact. The cleaning effect is actually a result of an implosion when the soundwave smashes into the object and creates a low pressure zone. And BTW, I love washing silverware in my ultrasonic cleaner *super lazy + super clean
• The ultrasonic transducers used for cleaning tanks are a specialist item and are not likely to be found in your average hobbyist catalogues. There are several types sold on ebay though.
• You should also not remain in the area for any length of time. Even though you can't 'hear' the ultrasound, it's still vibrating your eardrum and prolonged exposure will damage your hearing.
• Ultrasonic transducers are rated by frequency and wattage. The item you saw in that catalogue is just a 'buzzer' that makes a 'beep' sound when a voltage is applied. (that's no use for this application)

What are these specialist 'transducers'? Are they just a frequency generator?