Flow battery

It is stupid to use lithium like tesla when weight is not a factor.  Use of flow battery with non-toxic salt water is cheaper logical solution.
I think people should buy flow battery along with solar so even if they don’t sell to utility, they get to use most of solar energy.  They should still connect to utility since solar is not 100% reliable or during long period of cloudy days.
Harvard came up with non-toxic one with like 19watt/kg which is about washer size for 10kwh.  It can be placed in garage, basement, outside, or underground.
Non-toxic Aquion Energy’s Aqueous Hybrid Ion from Whitacre at Carnegie Mellon  have about same capacity per weight as lead acid.  At $1100 per 2.6kwh module around 300lbs, it is still kind of expensive though.  Not sure it is internally flow or not though.

google “real7777 wordpress”



2 thoughts on “Flow battery

  1. real7777 January 26, 2016 / 7:10 am

    Breakthrough battery prototype can store five times the energy of current Li-ion batteries
    [BGR News]
    Brad Reed
    BGR News
    January 25, 2016

    It’s the question that smartphone users have been asking for years: When will we get vastly better battery power in our devices? Thanks to some breakthrough research, significantly better battery technology may arrive sooner than expected. IFLScience points us to new research published in the Nature science journal that describes a prototype for a so-called “lithium-oxygen” battery that is based on lithium superoxide (LiO2) and can store up to five times the energy of current lithium-ion batteries.

    RELATED: Breakthrough research could solve a major problem with lithium-ion batteries

    According to the article in Nature, these kinds of batteries have proven tricky to develop in the past since “solid LiO2 has been difficult to synthesize in pure form because it is thermodynamically unstable.” However, they’ve now discovered “that crystalline LiO2 can be stabilized in a Li–O2 battery by using a suitable graphene-based cathode,” thus making it far less likely that these batteries will overheat.

    “This discovery really opens a pathway for the potential development of a new kind of battery,” Larry Curtiss, one of the coauthors of the study, explained in an official statement posted by the Argonne National Laboratory. “Although a lot more research is needed, the cycle life of the battery is what we were looking for.”

    Curtiss also explains that using lithium-superoxide to store energy offers the promise of creating a lithium-air battery that is a closed system and thus wouldn’t require constant intake of oxygen. Such closed systems are safer and more stable than open systems.

    You can learn more about this research at the Argonne National Laboratory’s website here.

    Related stories

    Breakthrough research could solve a major problem with lithium-ion batteries

    New breakthrough could lead to huge battery improvements

    A cotton T-shirt may one day charge your cell phone

    More from BGR: Tina Fey returns to SNL and mocks Sarah Palin in this must-see clip

    This article was originally published on BGR.com

  2. real7777 July 20, 2016 / 5:06 pm


    High capacity, low-cost flow battery powers up with the help of vitamins

    Colin Jeffrey July 19, 2016
    By using modified vitamin B2 molecules, researchers have created a rechargeable flow battery that could help …

    By using modified vitamin B2 molecules, researchers have created a rechargeable flow battery that could help solve large-scale electricity storage problems (Credit: Kaixiang Lin/Harvard University)

    Inspired by the energy storage capabilities found in our own bodies, researchers at Harvard University have come up with a way to create alkaline flow batteries using modified organic vitamin B2 molecules. As these molecules are non-toxic, non-flammable, and able to be produced at low cost, the researchers believe that their use could help revolutionize large-scale, inexpensive electricity storage from intermittent energy sources such as solar and wind.

    Flow batteries are rechargeable energy storage units that use chemicals dissolved in liquids stored in two external tanks that are separated by a membrane. After the battery has been charged up using energy from sources like wind or solar to pull electrons from the positively charged solution into the negatively charged solution, an electric current flow is produced when the battery is switched on the and the electron flow is reversed. The resultant cell voltage is normally in the range of 1.0 to 2.2 volts and, as a general rule, the larger the holding tanks, the greater amount of energy they can store.

    The new research carries on from previous work, where the Harvard scientists replaced metal ions used as conventional battery electrolyte materials in acidic electrolytes with organic compounds with charge-carrying capabilities called quinones. This was followed by research where they developed a quinone able to operate in alkaline solutions by replacing the original bromine additive with ferrocyanide, which is a common anti-caking agent added to such things as kitchen salt.

    This work ultimately led to the search for an even more environmentally-friendly quinone, and the researchers eventually discovered that, with a little fiddling, vitamin B2 could be put to use as a replacement. Vitamin B2 helps our bodies store energy derived from the breakdown of the foods we ingest, with the main difference between B2 and quinones being the way that the two exchange electrons in the process – B2 uses nitrogen atoms, whereas quinone gives off and picks up oxygen atoms.

    “With only a couple of tweaks to the original B2 molecule, this new group of molecules becomes a good candidate for alkaline flow batteries,” says professor Michael Aziz, the Gene and Tracy Sykes Professor of Materials and Energy Technologies at Harvard. “They have high stability and solubility and provide high battery voltage and storage capacity. Because vitamins are remarkably easy to make, this molecule could be manufactured on a large scale at a very low cost.”

    Before the Harvard team arrived at the use of modified B2 vitamins in their research, a vast range of other organic molecules were considered, but vitamin B2 won out with its high-performance and low production costs.

    The use of molecules such as vitamin B2 has also opened up a new realm of similar organic molecules for the team to explore and exploit, with the goal of developing a high-performing, long-lasting, organic-based flow battery. And they intend to do this by continuing research into similar energy-storage mechanisms found in nature.

    “We designed these molecules to suit the needs of our battery, but really it was nature that hinted at this way to store energy,” says professor Roy Gordon, the Thomas D. Cabot Professor of Chemistry at Harvard. “Nature came up with similar molecules that are very important in storing energy in our bodies.”

    The results of this research were recently published in the journal Nature Energy.

    The short video below explains the uses of a flow battery in alternative energy storage.

    Source: Harvard

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s