Just what the world needs! The more potential there is in the production new, clean energy sources the better - the clean-up is beginning thanks to the incredible work done by Tesla auto's.

Yet another new battery technology that we won't ever see again. >sigh< Remember 3D batteries? Sodium batteries? Lithium-Air? Aluminum-Graphite?

What do they think the readers never took a high school chemistry test? Magnesium? Really? They don't even mention that magnesium is highly flammable and very easy to ignite. Maybe they have a process or compound that inhibits combustion but I would assume they would mention that right up front.
Someone should do a study of academic research to see what percentage is real and what percentage is just a way to pump government grant money in to wildly implausible research.
And because of this I'm out.

Magnesium and heat from charge/discharge, what could go wrong?

The road to better rechargeable batteries is littered with stories that read, "Researchers say..." about technologies that didn't pan out. Call me when you're ready to report, "Engineers have announced..." I can name only two new secondary-battery chemistries since lithium-ion that have made it to mass production: nickel-zinc (AA cells) and lithium-polymer.

blitherer, hydrogen is also highly reactive in the presence of oxygen. When was the last (or even the first time) you heard about a simple glass of water spontaneously burst into flame or explode?

@Merlin Worried about the reactivity of magnesium? Opposed to what? Lithium? :D

This is great and all and I enjoy reading about 'new innovations' on this site, but realistically? Here we are, still using lithium batteries, the same old solar panel technology that is over thirty years old and on and on.
I often have read and seen real, working innovations presented here over the years and on other sites, over a much longer time and still--no 'super batteries', no 'wonder solar panels' and the like.
The truth is, the current industries are not going to reinvent their own wheel. Realistically these product innovations won't ever come to light any time soon.

And therein is the main problem, as Mike alluded to, getting new technology into mass production. The problem is not the scientists, I applaud their efforts, along the lines of "go where no-one has gone before", but then it all comes to a screaming stop because companies, having invested billions of dollars into factories and infrastructure to produce an item that would be obsolete by the new technology have to consider their futures. Advances, sad to say, are at the mercy of the bean counters. Getting new beneficial technology past the bean counters is a hard job, getting it past the existing businesses just as hard. Entrepreneurs .... where are you?

It is your 'duty' to report these "breakthroughs but I have to agree with the consensus- we are sick of hearing dozens of such stuff that invariably turns out to be bunkum. AS for comment on flammability of magnesium- this is NOT magnesium, but a material called magnesium scandium selenide spinel. And not prone to busting into flame. If people would read instead of displaying their inability to do so ...