Have Solar Panel. Need Batteries.

I'm on vacation in the east coast of the US for the week and the sun has been relentless. I can only hope to have clouds and maybe a shower or two to cool things down.

But mention clouds and the solar photovoltaic folks start to go berserk. Apparently solar panels have a hard time being of any use when there is no sun! An hour of clouds and your power generation tanks. Two days of rain can make dependance on renewable electricity seem like a return to the dark ages.

Enter batteries. Why not store the electricity during the times we generate it and use it in the night/when there are clouds etc? Sounds like a great idea, but the problem is... you guessed it... those batteries!

Anyway, long story short there are some batteries (different from vehicle batteries) that have the hope of being very useful for these sort of renewable storage applications. We are talking about MWh of storage (the M is for mega, so... big). There are a lot of batteries that are needed for this application, but the cost of these batteries is a problem and so is the lifetime. A third problem is that the energy efficiency of these batteries is not that great (maybe 50-70%). When someone tells you that the energy efficiency is 50% it means that you use twice the energy to charge the battery than you get on discharge. So 50% of your solar panels are a waste (great for the solar panel maker. Bad for the customer).

ARPA-E, the new kid on the DOE block, came up with a solicitation looking for ideas to fix these problems. This week, they announced a bunch of awards for some interesting new technologies that promise to solve these problems. One of the awards went to your faithfully (that would be me) along with two of my colleagues from LBNL- Vince Battaglia and Adam Weber. For the project we assembled a team consisting of Robert Bosch, DuPont, and 3M. We also had Proton Energy has a partner to help with some designs. Its an amazing team that beings together knowledge of electrochemistry, catalysts, membranes, and balance of plants to work on a battery called a "flow battery".

I will try to expand on what we proposed in the near future. If we (and any of the others funded) are successful, then we can get a step closer to having a more efficient grid. Click here for the list of awardees.

Till now, my blog has concentrated on vehicle batteries. I think its time I expanded into grid electricity. This is another big problem and something that needs attention.

In the meantime, for all your solar enthusiasts that complain about your batteries. Hold on... hold on. Give us a few years and we hope to have something for you.

Venkat

LBNL everywhere...?

ARPA-E announced the results for their latest round of solicitations that they issued a few months ago on transformational energy projects. One of the areas was batteries for vehicles. 10 projects were identified to receive the award (Here is the list). 3 of these (that I can talk about) have an LBNL connection. Its a proud day for what I consider the top battery program in the country. Turns out that the number 3 is not the full story, but I can't talk about any other connections that may (or may not) exist. Welcome to the world of startup's and confidentiality and stealth.

That's the quick summary. Here are the details. ARPA-E stands for Advanced Research Projects Agency-Energy, is the DARPA (Defense Advanced....) of DOE. I guess no one liked EARPA! Their mission is to (I copy and paste here):

- Enhance U.S. economic security by identifying technologies with the potential to substantially reduce energy imports from foreign sources; cut energy-related greenhouse gas emissions; and improve efficiency across the energy spectrum.

- Ensure the U.S. remains a technological and economic leader in developing and deploying advanced energy technologies.

This is the official spiel. In reality, ARPA-E is the agency that is supposed to help identify the next transformative idea related to energy technology. Think, the next transistor, or the next light bulb, but related to energy. You get the picture. These bullets above also do not convey the level of buzz this new agency has generated in the battery community. We have been energized. Getting ARPA-E funding is now considered to be a big deal. A very big deal. There are huge bragging rights for the winners, and those who are finalists.

No officially numbers have been released, but my sources (is that an euphemism for "I pulled it out of you-know-where"?) tell me that 350 concept papers came in the battery area. Of these 70 were down selected for submitting a full proposal. Of these 70, 10 were funded (ARPA-E folks: Please feel free to correct this). Less than 3% of ideas are funded! Now you know why being one of the 75 is a big deal and being one of the 10 is an even bigger deal. So you can see why its a proud day for LBNL when we have 3 funded proposals that we are involved with.

LBNL was involved in 6 submissions in the concept paper stage. All 6 were selected for submitting a full proposal. 2 of these 6 were selected to receive an award. The first of these is a project on a lithium sulfur (Li-S) battery that was led by Sion Power. Li-S is a chemistry that promised very high energy density, but has a lot of problems that hinder it from being commercialized. Sion is in the forefront of developing this technology. They will be working with John Newman, who is, for those of you who don't know, the father of electrochemical engineering (For those who track these things- I consider Charles Tobias to be the grandfather of electrochemical engineering). He wrote the book on the subject, literally. If you don't believe me, check this link. John Newman will be helping Sion with modeling their system. Systems like Li-S, if commercialized, can solve the problem of range for EVs and can help us adopt this technology.

The second is one from Applied Materials. They want to develop a manufacturing process that will lead to low-cost batteries that have high energy. Cost, as I have pointed out again and again, is one of the show-stoppers that prevent large scale adoption of EVs and PHEVs. Addressing this issue is critical. Applied will be working with Gao Liu and Vince Battaglia- both experts in making battery electrodes and cells.

These are the two where LBNL appears in the list. But there is one more that is hidden (that I can talk about). This is Polyplus, which got funded to develop Li-air batteries. Polyplus is a LBNL spinoff started by Steve Visco and Lutgard De Jonghe . Some of the underlying work that led to the formation of Polyplus was conducted under, what is now, the BATT Program. Li-air is the Holy Grail of batteries- a system that has 10x the energy density of today's batteries on a mass basis. Polyplus is pretty much the top company in this area. If they succeed, we can make a big dent on the range issue with EVs.

Three very different projects; but they all promise to change the world if they succeed. The fact that the reviewers have picked so many of the projects that LBNL was involved with is a testimony to the cutting edge research that happens here. Congrats to all the winners. And did I mention that this is not all. There may (or may not) be other connections. Stay tuned.

In a future post, I will delve a bit more into these technologies and provide my thoughts on what the critical challenges are and what (I think) their approach will be.

Venkat