Spyke

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Fully Charged in Just 12 Minutes! Korean Scientists Develop Next-Gen Lithium–Sulfur Battery

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This is more accurate than you would think. I've seen people synthesize a new inorganic compound, and is then more or less forced by supervisors to test it as an intercalation host for Li- or Na-ion batteries without really having thought through whether that makes sense at all.

Li is small, and as long as there is room for it (sites for it to sit when intercalated and paths to diffuse through the material), and there is some species that can accommodate the additional charge (as one Li+ is introduced into the material, there needs to be a charge compensation to maintain charge neutrality - typically this is a transition metal cation that is reduced from a higher oxidation state to a lower one). In that sense a lot of materials could serve as hosts, and depending on the intercalation potential, it could be used as a cathode (LiCoO2 for instance, where the intercalation potential vs. Li/Li+ is so high that it makes for a good cathode) or an anode (LTO for instance, where the intercalation potential vs. Li/Li+ is so low that it rather makes sense to pair it with a high potential cathode, and instead make for a more niche application where things such as safety is more coveted). That said, only three structure types have been widely used commercially as intercalation hosts for Li-ion batteries: layered rocksalt types (like LiCoO2 and its deriviates, NMC and NCA), spinels (LiMn2O4 or LTO) or olivines (LiFePO4, or LFP).

Li-S is not someone randomly mixing Li with some other elements though, it has been researched for a long time and is considered one of several "holy grails"

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Maintaining and making new friends when everyone seems to be having kids?

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That uncle role is not something I am looking for, though. I am after adult relationships, and it is the loss of these I am saddened about. For the record, I do not blame neither the parents or especially their kids for this change. They do not owe me a continued adult relationship for our entire lives. It is completely up to them to pursue this life, and as I said, I am happy for them as long as this is what they really wanted, and I agree that their kids should be their priorities once they have had them. But so far, in my experience, the kind of relationship becomes completely different. For instance, my girlfriend and I were invited over for dinner to one of my close friends from my twenties, his wife and their two kids. After we left, we were both left with a feeling that we hadn't talked with them at all - we were interrupted constantly by their kids seeking their parents attention. Some parents handle this better - I know others who are better at setting boundaries for their kids and teaching them to not interrupt and wait for their turn, but the interactions with them are still very different - their lives almost entirely revolves around their kids. I was once involuntarily part of a conversation regarding the color and viscosity of kid's shit.

When I reread my original post, I realize it could be interpreted like I want to somehow get things back to how they were before. I know they won't be, and it's not what I meant. I was simply after real stories (i.e. not imagined solutions) of how people in a similar situation, having experienced a similar loss of close friendships, ended up with either new, great friends with a similar outlook on life or anything else that improved that part of their life.

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Fully Charged in Just 12 Minutes! Korean Scientists Develop Next-Gen Lithium–Sulfur Battery

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In this case, C refers to the current rate, not the unit Coulomb. It is a standard way of giving the current rate in battery research, and 1C is defined, as oldfart says, as the current rate required to charge that particular battery fully (to its nominal capacity) in one hour. 2C is twice this, so it is charged in half an hour, and C/2 is half this, so it is charged in two hours.

It is a convenient way of giving the current rate, because it allows a more application focused comparison (i.e. my EV battery or phone battery should be able to charge fully in one hour), but it hides the actual capacity of the battery (you have no way of knowing, without additional information, if the cell has a small or a large capacity).

ETA: The last point here is what deranger and AwesomeLowlander is getting at. You can have a very small battery with very little active material, and charge that at 10C and achieve reversible cycling for many, many cycles, and it is meaningless if it cannot be scaled to a larger cell (unless we are only considering microbatteries for example). Usually, results at a small scale is not directly transferable to larger scale, and you encounter all kinds of challenges as you scale up.

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Maintaining and making new friends when everyone seems to be having kids?

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Thanks for sharing your experience. It seems you have found a sweet spot that works well for your life, and you sound like a good friend. I get the impression that you enjoy a kid's company far more than I do, though. I generally get exhausted around them and the stressful lives their parents lead, and I don't actually want to be a part of this. Which is a me-problem, I know. I fully agree with you when you say that they will probably not be knocking on my door when they are ready to be social again, but it sounds like a very one-sided effort to maintain a friendship in the meantime. My friends mostly move out of the city back to where they grew up as well, so just popping over with a meal is not always possible. I have myself moved elsewhere for work now, partly because the number of friends still staying in the city I lived in before had greatly diminished.

I used to go on mountain hikes with my best friend from my childhood once a year (we've already lived in different cities for a long time, so we haven't really been hanging out for many years), but he's awaiting twins anytime now, so it's going to be at least some years before it will be possible for him to even consider spending any vacation days on such a trip. I used to have yearly cabin trips with friends from university until they got all got kids approximately at the same time (during COVID). They now go on kid-friendly family vacations together. I used to frequent restaurants with a fellow foodie. We sometimes still do, but it's gone from maybe once a month to once every two years. It is these kinds of relationships that I miss.

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Electorialism (tempted to vote biden)

Until your system does anything useful with third party votes or couch-sitting, you go out and vote every time for whatever does the least damage to democracy. But don't disengage from the political world after the election. Between elections, you work to change the system. Find groups that tries to do this and volunteer. If you really care about it, you will need to dedicate your time to the cause, even though it might seem hopeless and may very well be.

I understand your situation sucks and you are tempted to say "Fuck the status quo" and desperately do something different in hopes that something will somehow change. But you know who do go out and vote, every fucking time? The racist assholes who would love to see Trump and his fascists cronies in power. And if that happens, it is game over. You will never get any chance to change anything, except from after a big traumatic event such as a big war ("civil" or otherwise).

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Battery demand and domestic cell production: EU's goal of 90% self-sufficiency by 2030 is 'feasible but far from certain,' researchers call for 'reliable industrial policies'

Adding this to my readlist for later this week. I see it starts by outlining batteries as critical to mitigate climate change, but right now, from a European perspective, I think energy independence will be a much more powerful driver than climate change to make sure we have regional production of critical energy infrastructure, including battery manufacturing. Time to realize we can't be dependent on China and the US for this, and that China in particular will not allow us to successfully establish this industry according to free market principles with them flooding the market with cheap batteries (as they've done before in other sectors, and likely will do more as a result of US tarrifs). We can't compete, so we must subsidize to ensure establishment of regional production capacity.

europe

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[Discussion] Should the EU adopt an official, simplified auxillary language?

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Hehe, that one is often suitable, and I think it fits nicely here.

I don't count English as a particularly easy language to master. Do you not think there are some problems that arise from assymetry in ability to learn English? Not just thinking about legal documents, but debates, discussions, negotiations etc.

And is this massive amount of translation not just very inefficient? Although I suspect at best a new language would come in addition, so we're back to the xkcd-strip and nothing was solved there.

europe

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[Discussion] Should the EU adopt an official, simplified auxillary language?

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I'm curious, what language would you consider being easy to learn

A language with no grammatical irregularities for starters. And one where the phonetics are consistent. Constructed languages can offer this. Whether any existing ones are sufficiently easy, I'm not sure.

And then some mechanisms that facilitates vocabulary building. For instance, I like the affixes in Esperanto, as understanding the root word and then the affixes allows you to pick up all kinds of words you never explicitly learned. And example is -ejo, which indicates a place, could be combined with a root word such as the verb forĝas (to forge, root: forĝ-), yielding forĝejo = place where one forges. Or monero (money, root: moner-) + -ejo yields monerejo = place where one stores money (= monero).

I'm sure with modern linguistic knowledge a much easier language than Esperanto could be constructed.

However, it's not that you can dictate a language

The question was whether an auxillary language would be a good idea. It would necessarily be dictated. Every citizen would learn it in school. The proposed benefit having a a common language easily learned and spoken equally well by all member state citizens, that could be used to cross language barriers (like English is today), and that could be used within EU (i.e. all institutions) as an official language.

For the record, I am intrigued by the idea, but I am very open to this being a bad idea, which is why I made the thread to hear people's opinions.

writing

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Writing Club - July 2025

I have just today started on a scientific book project I've been wanting to write for some time. It is a very long term project, and my main goals are 1) to have fun researching and writing and 2) document my research for my own enjoyment down the line. If this becomes a coherent work eventually, I will aim to release it under some CC-license, although this is not my main goal.

It's off to an enjoyable start at least :)

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How do you keep up to date on current events?

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Thanks for a detailed account of your system!

one things i really wish existed is an extension that detects and blocks any site leading to garbage about the current US president, who i despise and want to ignore, despite ignoring it being to my detriment most likely. that vile man needs to go away.

I think that man (and the team around him) is a perfect example of someone who exploits this barrage of "information" to their advantage, and does that very well. I remember how nice the relative silence some months into Biden's presidency (after the insurrection stopped being a constant headliner in the news cycle). This is one of the reasons I desperately want to find a way to keep on top of things, because it feels like the overall events matter if I can only cut through the noise and understand the big picture. I live in Europe, and current events leads to a lot of uncertainty for the region that I think is better to understand and be prepared for, rather than ignorant of.

additionally, i have a collection of hundreds of map sites bookmarked, with a folder containing a set i check with about the same regularity as my news sites.

This is an interesting source I have not really explored myself (aside from weather and occasionally a flight map). I need to investigate what kinds of local maps could be beneficial to have bookmarked. The event map is already bookmarked now!