Broadly speaking, renewable resources are sources of power or energy that aren’t depleted with use.
Solar, wind, and hydro power rank amongst the most well-known, having become more and more
a part of the modern world. However, we also need ways to store all the energy generated,
and the element Lithium has a big part to play here. But the problem is that
lithium itself isn’t an endless commodity. So, this is Unveiled, and today we’re exploring
the extraordinary reasons why scientists are so worried about running out of lithium.
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Lithium is one of the first elements on the periodic table; atomic number three,
and represented by the symbol Li. It’s incredibly lightweight and low density. This stuff is highly
reactive and flammable, too, further showing that it’s something of an element of extremes. As such,
to keep it pure and to avoid reactions with the air around it, lithium has to be kept in inert
liquids or vacuum chambers. Next, lithium is known for its unstable nucleus, with the only stable
isotopes of it being lithium-6 and lithium-7 – and even they are only just making the cut for
the stable criteria. Nevertheless, it’s this which makes lithium a perhaps surprisingly rare element
in our solar system, compared to others near it on the periodic table. While hydrogen and
helium are everywhere, lithium not so much. The name lithium is derived from the Greek
word “Lithos”, meaning stone. It’s found in rocks and minerals. It’s also a toxic metal,
however, even though traces of it are all across the animal kingdom and found in many different
plants and creatures around the world… a fact that remains something of a mystery to science.
What’s most crucial for today’s video, though, is that largely due to its light weight, low density
and high reactivity, lithium is a key component in almost all portable electronic devices… because
of its amazing functionality in batteries. Getting the lithium into everything from your
phones to games consoles is no mean feat, however. Lithium doesn’t occur in its pure form anywhere
in nature. Instead, it’s found in compound form inside minerals and particularly salt lakes. To
get to it, then, the lithium has to be isolated, which is a difficult task. And, again, it’s not as
though this stuff is everywhere in any variation. Although it is present on every continent,
the amount varies, with some countries known to have far more mining potential than others.
The Lithium Triangle is a name given to three such countries close together, that reportedly have
around seventy-five percent of the estimated worldwide lithium supply total – Chile,
Argentina, and Bolivia. These countries all boast massive salt flats which are packed with lithium,
leading more and more lithium dependant companies to set up there.
To extract it, workers must pump water into the ground to force the salt brine
that’s buried beneath to rise to the surface. That brine is then evaporated in the hot sun,
leaving behind various useful products… including lithium. It’s a process that can take up to two
years, though, which means the lithium supply chain is almost always under some sort of time
pressure. In Australia, another serious player in the world’s lithium market, there have been
some alternative, hard-rock mining techniques put to use to gather it more quickly… but there are
downsides, such as concerns about the impact on the environment and on workers’ health.
You might think that given the difficulties in getting it, then, we’d try our best not to use
or need lithium too much. But no. Today, lithium is more popular than ever all around the world,
with annual consumption reportedly rising by about nine percent every year. More and more industries
are depending on this one useful but invariably tricky element. Again, it has become vital in
the manufacture of portable power batteries, which means it’s crucial for everything from smartphone
to laptop. The world is more or less hooked on these gadgets nowadays, and many people choose
to regularly upgrade their tech… so it’s not as though, judging by current behaviors, we’re about
to wean ourselves off of lithium any time soon. Unsurprisingly, there are reasons why lithium
batteries are favored by tech producers over numerous other options. Lithium products are
able to sustain higher voltages and have much higher potential charge storage, compared to
most non-lithium batteries. They’re also generally deemed to be low maintenance and longer lasting.
More than just phones and computers then, for these reasons they’re also used in clocks,
cameras, and in health and medicine – with modern pacemakers powered by lithium,
for example. Perhaps most significantly of all, however, lithium batteries are key for
electronic vehicles, too, an extremely fast-growing industry in modern times.
Altogether, this is the main reason why scientists (and, indeed, manufacturers, engineers,
and electronics companies) are so worried about lithium shortages. While there are reserves of
lithium currently on Earth, the massively rising demand may very soon prove to be too much. The
projected timeframes differ from source to source, but increasing numbers are struggling to see how
we can comfortably continue at current rates past even 2030. Given that the use
of e-vehicles is set to grow and our dependence on portable electronics isn’t likely to fall…
the turn of the next century, the year 2100, has been widely mentioned as a date by when a collapse
of lithium supply could well have taken hold. At present, then, the wider outlook isn’t good.
Lithium’s relatively new-found position as “king of batteries” means that it’s also
become an extremely important ingredient in the bid to end use of fossil fuels and improve
carbon emission stats. Where some renewables may struggle to maintain steady and reliable power,
lithium batteries have the potential to solve that problem. They excel at keeping energy
stored for long periods of time, making them seriously useful in long-term green energy plans.
Such is its growing importance, lithium has even been given the nickname of “white gold”.
It’s that valuable. But, because of all the issues surrounding it – including the cost,
time, and potential environmental impact of its extraction – it has become a more and
more challenging and controversial struggle to make it work. It is possible to recycle lithium,
which would naturally help to alleviate the predicted shortages… but, so far, widespread
re-use models are few and far between. There are positive signs, but not standard procedures.
Finally, there are more reasons than just technology as to why we should want to try
and find a workaround here. Although lithium’s main draw is undoubtedly in batteries and
sustainable energy, scientists can also use it for a surprisingly wide variety of different needs.
For example, it’s used as a medicine in small amounts,
and is prescribed in some regions to treat mood disorders – including depression.
Why it works is still a little bit of a medical mystery, but lithium can seemingly help to
stabilize mood… and it’s thought that it may play other roles in maintaining a healthy human body,
as well. Elsewhere, lithium is used in nuclear fusion research. The lithium-6
isotope doubles up as an effective shield against radiation, with wide applications in the field.
And lithium-7 can be used as coolant in nuclear reactors and nuclear fusion tokamaks.
In more “every day” life, the element also turns up in the manufacture of some ceramics and glass…
and it’s present in a lot of cookware, thanks again to its light weight, relative strength,
and thermal qualities. In short, the contemporary world really needs it to hang around!
Thankfully, right now, lithium reserves are still generally deemed to be steady and not
especially in danger… but there are growing fears of an emerging problem that’s creeping
up on the horizon. As it stands, lithium is set to become much harder to acquire,
perhaps within the decade. And that inevitably means that it will become more expensive.
And, with so much of our current and future technology apparently resting on this stuff,
that represents a big concern. In some ways, it’s a strange turn of events.
Lithium was one of the very first elements to form in the universe after the big bang.
It’s always been here… but human civilization has arguably never needed (or even noticed) it
quite as much as it does right now. After billions of years, it’s suddenly become
vital to the running of modern human society. And so, unless something changes soon,
unless more reserves are found or lithium alternatives are devised,
we could be heading for trouble. A key component in our increasingly high-energy lives appears to
be under genuine threat. And that’s why scientists are so worried about running out of lithium.
What do you think? Is there anything we missed? Let us know in the comments, check out these other
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