Team develops sustainable, high energy density battery

March 2, 2017
Gautam Yadav with the low cost, rechargeable high energy density battery developed at CCNY's Grove School of Engineering.

Researchers at The City College of New York-based CUNY Energy Institute announce the development of a novel low cost, rechargeable, high energy density battery that makes the widespread use of solar and wind power possible in the future. It is based on manganese dioxide (MnO2), an abundant, safe and non-toxic material.

In a paper in the journal Nature Communications, the scientists report that the uniqueness of the battery is that it is able to achieve both high cycle life and high areal capacity. Achieving high areal capacity is critical for packing a lot of together into a battery case. In essence a high areal capacity is required to build a real, practical battery, as opposed to a small toy battery.

Past researchers have achieved either high cycle life or high areal capacity, but never both together, the team notes.

The innovation that makes this possible is intercalating copper (Cu) into bismuth-modified δ-MnO2, which is called birnessite. The latter was discovered by Ford Motor Company in the 1980s, but it was never known how to use it at high areal capacity. This was later discovered at the CUNY Energy Institute by a team led by Sanjoy Banerjee, Distinguished Professor and director of the Institute.

The battery is intended for use at the scale of the power grid. This would make widespread use of solar and possible.

Explore further: Cathode material with high energy density for all-solid lithium-ion batteries

More information: Gautam G. Yadav et al. Regenerable Cu-intercalated MnO2 layered cathode for highly cyclable energy dense batteries, Nature Communications (2017). DOI: 10.1038/ncomms14424

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5 comments

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EyeNStein
5 / 5 (1) Mar 02, 2017
Totally lacking the detail required to make an assessment.

Even hype that it's twice a good as 'x' where 'x' is an obsolete version of an established technology would be better than this.
DonGateley
not rated yet Mar 02, 2017
Agree with EyeNStein. I know little if anything more now than before reading the article. You can do better than this unless the game is all about clicks.
gkam
1.7 / 5 (6) Mar 03, 2017
If you look up "CUNY Energy Institute battery" you will find they are doing serious work.
antialias_physorg
not rated yet Mar 03, 2017
Totally lacking the detail required to make an assessment.

I went over to his webpage to check for recent publications, but they don't seem to offer any clues, either
http://www.cuny.e...jee.html

The guy in the picture has related publications in recent times, though. Seems they are working on MNO2-Zn batteries
https://scholar.g...mp;hl=en
carbon_unit
not rated yet Mar 03, 2017
Here's the press release this article is extracted from:
http://www1.cuny....nd-safe/
The chemistry is non-flamable while _potentially_ matching the energy density of lithium-ion.
Past researchers had achieved either high cycle life or what's called "high areal capacity" – that is, packing a lot of battery electrodes into a small volume to increase energy density – but never both together. For example, one recent report achieved 5,000 cycles, but at only at a minuscule output of one milliamp hour per square centimeter (1 mAh/cm2) areal capacity. Another successfully achieved 26 mAh/cm2, but with only 60 recharging cycles. The CUNY battery leaves them in the dust by getting 6,000 cycles at 2.5 mAh/cm2 and 1,000 cycles at 28 mAh/cm2.
Sounds good, but if I had a $ for every battery tech breakthrough article, I could retire as a rich man...

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