Live Stoner Chat Live Stoner Gossip
- Status
Tetra9
Wannabe Botanist
- Joined
- Mar 16, 2015
- Messages
- 1,574
- Reputation
- 0
- Reaction score
- 6,075
- Points
- 0
- Website
- www.autoflower.net
Wooh - great share. i would have shat myself
Don't ask my mind how it got there, because I don't fully remember myself. But...found this on a site talking about mood rings:
Have a purple kind of day (just avoid the reddish side of the spectrum) !!!
Have a purple kind of day (just avoid the reddish side of the spectrum) !!!
morning stoners!!
bad dragon bzzz
10th Year Anniversary
- Joined
- Feb 23, 2014
- Messages
- 20,584
- Reputation
- 40
- Reaction score
- 83,933
- Points
- 0
- Currently Smoking
- are you special?
howdy peeps
i posted a pic a while back of an unknown portal plant a while back.it will come as no surprize to most that i made a boo boo(i am a gobshite afrter all).that pic was of a vertigo not an autoflowerportal.
i found the bit of paper i had with the names on it from about 8 months ago,its still unknown but its either a sour mango,fairy frost,black stone or a moonstone amnesia
*note to self dont put things in a safe place when stonned,they may never be found again*
i posted a pic a while back of an unknown portal plant a while back.it will come as no surprize to most that i made a boo boo(i am a gobshite afrter all).that pic was of a vertigo not an autoflowerportal.
i found the bit of paper i had with the names on it from about 8 months ago,its still unknown but its either a sour mango,fairy frost,black stone or a moonstone amnesia
*note to self dont put things in a safe place when stonned,they may never be found again*
trailanimal
son of soil
mystery girl look'in goodhowdy peeps
i posted a pic a while back of an unknown portal plant a while back.it will come as no surprize to most that i made a boo boo(i am a gobshite afrter all).that pic was of a vertigo not an autoflowerportal.
i found the bit of paper i had with the names on it from about 8 months ago,its still unknown but its either a sour mango,fairy frost,black stone or a moonstone amnesia
*note to self dont put things in a safe place when stonned,they may never be found again*
- Joined
- Sep 1, 2014
- Messages
- 13,081
- Reputation
- 5,386
- Reaction score
- 46,428
- Points
- 0
- Currently Smoking
- yo arse
Silicon and Graphene Combo Finally Achieve Lithium-Ion Battery Greatness
Hopefully this means, longer lasting rechargable Vaporizer batteries, will be with us in the near future
Silicon, graphene, and sometimes the two of them combined together have all been suggested as potential replacements for graphite in the electrodes of lithium-ion batteries.
While all three of these options bring attractive properties to the table—most importantly, a very high theoretical capacity—those properties are lost in the real world. Silicon electrodes crack and break after just a short number of charge/discharge cycles. Meanwhile, the use of graphene on electrodes is limited because graphene’s attractive surface area is only possible in single stand-alone sheets, which don’t provide enough volumetric capacitance. Layer the graphene sheets on top of each other to gain that volumetric capacity, and you begin to lose that attractive surface area.
Now researchers at Kansas State University (KSU) claim to have developed a technique that uses silicon oxycarbide that makes the combination of silicon and graphene achieve its expected greatness as an electrode material.
“Silicon combined with graphene is better than a bulk silicon electrode,” explained Gurpreet Singh, an associate professor at KSU and one of the researchers, in an e-mail interview with IEEE Spectrum. “However, nano-silicon/graphene electrodes fail to satisfy key requirements for any practical applications.” Among other things, they have poor volumetric capacity, high cost, and low cycling efficiency—too much lithium is lost irreversibly with each charge-discharge cycle. What’s more, their mechanical and chemical instability that can lead to rapid capacity decay.
To overcome this, the KSU researchers turned to the high temperature glass ceramic, silicon oxycarbide. In research described in the journal Nature Communications, the KSU team created a self-standing anode material consisting of silicon oxycarbide glass particles embedded into a chemically modified graphene oxide matrix.
A heated silicon resin decomposes so that “the constituent silicon, carbon, and oxygen atoms are arranged in a random 3-D structure, and any excess carbon precipitates out into string-like or cellular regions. Such an open 3-D structure renders large sites for reversible lithium storage and smooth channels for solvated lithium-ion transportation from the electrolyte.”
This stands in stark contrast to crystalline silicon, which undergoes an alloying reaction with lithium that results in enormous volume changes and also an irreversible reaction with the electrolyte that leads to chemical instability and fading capacity as the charge-discharge cycles add up.
The KSU researchers claim that the electrode has a capacity of approximately 600 miliampere-hour per gram or 400 miliampere-hour per cubic centimeter of the electrode after 1020 cycles. The researchers expect that the power density (the maximum amount of power that can be supplied per unit mass) is expected to be more than three times that of today’s Li-ion batteries.
In future research, the KSU team aims to produce electrode materials with larger dimensions. As a benchmark, the researchers are looking at today’s pencil cell battery that uses a graphite-coated copper foil electrode, which is more than 30 cm in length.
Singh added: “We are also looking at batteries as structural materials, such as load bearing batteries that can be charged and discharged while under dynamic loads.”
copied from - http://spectrum.ieee.org/nanoclast/...aphene-together-for-liion-electrodes-realized
Hopefully this means, longer lasting rechargable Vaporizer batteries, will be with us in the near future
Silicon, graphene, and sometimes the two of them combined together have all been suggested as potential replacements for graphite in the electrodes of lithium-ion batteries.
While all three of these options bring attractive properties to the table—most importantly, a very high theoretical capacity—those properties are lost in the real world. Silicon electrodes crack and break after just a short number of charge/discharge cycles. Meanwhile, the use of graphene on electrodes is limited because graphene’s attractive surface area is only possible in single stand-alone sheets, which don’t provide enough volumetric capacitance. Layer the graphene sheets on top of each other to gain that volumetric capacity, and you begin to lose that attractive surface area.
Now researchers at Kansas State University (KSU) claim to have developed a technique that uses silicon oxycarbide that makes the combination of silicon and graphene achieve its expected greatness as an electrode material.
“Silicon combined with graphene is better than a bulk silicon electrode,” explained Gurpreet Singh, an associate professor at KSU and one of the researchers, in an e-mail interview with IEEE Spectrum. “However, nano-silicon/graphene electrodes fail to satisfy key requirements for any practical applications.” Among other things, they have poor volumetric capacity, high cost, and low cycling efficiency—too much lithium is lost irreversibly with each charge-discharge cycle. What’s more, their mechanical and chemical instability that can lead to rapid capacity decay.
To overcome this, the KSU researchers turned to the high temperature glass ceramic, silicon oxycarbide. In research described in the journal Nature Communications, the KSU team created a self-standing anode material consisting of silicon oxycarbide glass particles embedded into a chemically modified graphene oxide matrix.
A heated silicon resin decomposes so that “the constituent silicon, carbon, and oxygen atoms are arranged in a random 3-D structure, and any excess carbon precipitates out into string-like or cellular regions. Such an open 3-D structure renders large sites for reversible lithium storage and smooth channels for solvated lithium-ion transportation from the electrolyte.”
This stands in stark contrast to crystalline silicon, which undergoes an alloying reaction with lithium that results in enormous volume changes and also an irreversible reaction with the electrolyte that leads to chemical instability and fading capacity as the charge-discharge cycles add up.
The KSU researchers claim that the electrode has a capacity of approximately 600 miliampere-hour per gram or 400 miliampere-hour per cubic centimeter of the electrode after 1020 cycles. The researchers expect that the power density (the maximum amount of power that can be supplied per unit mass) is expected to be more than three times that of today’s Li-ion batteries.
In future research, the KSU team aims to produce electrode materials with larger dimensions. As a benchmark, the researchers are looking at today’s pencil cell battery that uses a graphite-coated copper foil electrode, which is more than 30 cm in length.
Singh added: “We are also looking at batteries as structural materials, such as load bearing batteries that can be charged and discharged while under dynamic loads.”
copied from - http://spectrum.ieee.org/nanoclast/...aphene-together-for-liion-electrodes-realized
- Joined
- Sep 1, 2014
- Messages
- 13,081
- Reputation
- 5,386
- Reaction score
- 46,428
- Points
- 0
- Currently Smoking
- yo arse
Graphene Could Help Generate Power From Rain
This could be very useful if you wanna go off grid in a country where it isn't always sunny!
solar cells operate efficiently by washing away dust and dirt that block the sun’s rays. Still, photovoltaic cells depend on light to produce electricity, and so generate a negligible amount of power when there are clouds overhead.
But researchers in China wondered whether it would be possible to create all-weather solar cells. “We would like to develop a solar cell that can be triggered by sun and rain,” says study lead author Qunwei Tang, a materials scientist at Ocean University of China in Qingdao.
So, how do you generate current from rain? Raindrops are not pure water. They contain salts that split up into positive and negative ions. To manipulate that bit of chemistry, the Ocean University researchers turned to graphene, the one-atom-thick sheets of carbon. Graphene's electrons can attract the positively charged ions, such as sodium, calcium and ammonium. The result: separated layers of positive and negative ions that act much like acapacitor to store energy.
With that in mind, the scientists added graphene to a dye-sensitized solar cell, a kind of inexpensive thin-film solar cell, then put them on a flexible, transparent backing of indium tin oxide and plastic. The resulting flexible solar cell demonstrated a solar-to-electric conversion efficiency of up to 6.53 percent, and generated hundreds of microvolts from slightly salty water that was used to simulate rainwater. “Future solar cells may produce electricity in all weather,” Tang says.
The scientists detailed their findings on the possibility of a rainy day solar cell in the 21 March online edition of the journal Angewandte Chemie International Edition.
Future research will investigate how to handle the variety of ions found in rain, as well how to generate electricity from the low concentrations of these ions typically seen in rainwater, Tang says.
Copied from - http://spectrum.ieee.org/energywise/green-tech/solar/graphene-could-help-generate-power-from-rain
This could be very useful if you wanna go off grid in a country where it isn't always sunny!
solar cells operate efficiently by washing away dust and dirt that block the sun’s rays. Still, photovoltaic cells depend on light to produce electricity, and so generate a negligible amount of power when there are clouds overhead.
But researchers in China wondered whether it would be possible to create all-weather solar cells. “We would like to develop a solar cell that can be triggered by sun and rain,” says study lead author Qunwei Tang, a materials scientist at Ocean University of China in Qingdao.
So, how do you generate current from rain? Raindrops are not pure water. They contain salts that split up into positive and negative ions. To manipulate that bit of chemistry, the Ocean University researchers turned to graphene, the one-atom-thick sheets of carbon. Graphene's electrons can attract the positively charged ions, such as sodium, calcium and ammonium. The result: separated layers of positive and negative ions that act much like acapacitor to store energy.
With that in mind, the scientists added graphene to a dye-sensitized solar cell, a kind of inexpensive thin-film solar cell, then put them on a flexible, transparent backing of indium tin oxide and plastic. The resulting flexible solar cell demonstrated a solar-to-electric conversion efficiency of up to 6.53 percent, and generated hundreds of microvolts from slightly salty water that was used to simulate rainwater. “Future solar cells may produce electricity in all weather,” Tang says.
The scientists detailed their findings on the possibility of a rainy day solar cell in the 21 March online edition of the journal Angewandte Chemie International Edition.
Future research will investigate how to handle the variety of ions found in rain, as well how to generate electricity from the low concentrations of these ions typically seen in rainwater, Tang says.
Copied from - http://spectrum.ieee.org/energywise/green-tech/solar/graphene-could-help-generate-power-from-rain
trailanimal
son of soil
this is cool, generate with solar, wind, and rain!
bad dragon bzzz
10th Year Anniversary
- Joined
- Feb 23, 2014
- Messages
- 20,584
- Reputation
- 40
- Reaction score
- 83,933
- Points
- 0
- Currently Smoking
- are you special?
we had hail today,what hope have you of doing a gorila grow in this !
just noticed on one of my plants a strange lil half twist thing just at the very tip of a few leaves ?
just noticed on one of my plants a strange lil half twist thing just at the very tip of a few leaves ?
- Status