Viruses breathe new life into batteries – Physics World

Better batteries through biology – YouTube

Biologically enhanced cathode design for improved capacity and cycle life for lithium-oxygen batteries – Nature Communications

About 10 years ago, this virus battery made some headlines. It didn’t die, the paper has been cited a hundred times in the intervening time. But it’s not something you’re going to find in your next cell phone or next year’s electric vehicle. So what would make this kind of battery so awesome, and why are viruses even relevant? It’s not the biological properties of the virus, it’s the chemical properties. It has the right surface to grow the Manganese oxide, and it has the right dimensions to make nanorods.

Synthesis of manganese oxide nanorods and its application for potassium ion sensing in water

Probably a chemical method could be developed to synthesize things with the right surface and dimensions in bulk. Non-templated growth is possible though I imagine it would be very hard to get the exact properties right.

Bacteriophage Production Models: An Overview

But if you did need to develop a ton of bacteriophage to use as a battery material, how would you do it? That reminds me of bacteriophage therapeutics. Medicine faces the same problem: how to grow a ton of phage without bacterial garbage contamination. A recent review talked about the production of phage. The biggest reactor they found was 8L (about 2 gallons).

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“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries

Wow. OK, this is a tour de force. Some of the experiments are pretty typical battery research (voltammetry, discharge curves, etc.). This group went farther and did molecular dynamics and density functional theory analysis of the chemistry happening during the charging process. They do ¹⁷O NMR to look at the electrolyte and water. They do XPS and etch and do XPS again to look at the depth profile of the chemistry. If you want to know what’s happening in a battery, here’s how to do it.

OK, stuff that’s not really science below.

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Fitbit can look at your resting heart rate over time. Minor complaint: I couldn’t download my resting heartbeat data into Excel, though. It’s hard to look back at resting heart rate history. I had to click back through the “date” function in the Dashboard and take screenshots of the graph every ~30 clicks/days. Google bought FitBit recently, and now the high-resolution heart rate data are available to Calico, I expect. That could be a big deal.

On my graph, you can see the rise preceding major grant deadlines. So that’s… cool? Cool. Cooool.

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