3 ms·
The approach, detailed in the paper here: https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202002718 https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2
by scythe 6y ago
The approach, detailed in the paper here:
https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202002718 https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2020027...
attempts to mimic the performance of the leading lithium-ion battery cathodes, nickel-manganese-cobalt (NMC) and nickel-cobalt-aluminium (NCA) by carefully synthesizing the cobalt-free hybrid nickel-manganese-aluminium (NMA) to mimic the crystal structure of NMC and NCA. In all cases, the largest fraction of the cathode is nickel, and cobalt/manganese/aluminium are essentially dopants. The authors note that manganese and aluminium produce opposing effects on the crystal structure of lithium-nickel-cobalt oxides, and go on to say:
>Strikingly, a natural combination of Mn and Al in high-Ni layered oxides, i.e., LiNi 1−x−y Mn x Al y O 2 (NMA; suggested by us earlier [8] ), has not been reported to our knowledge.
It is definitely surprising that the missing "third leg" between NMC and NCA has not received more serious attention, if that is true. Manganese and aluminium are both far more common than cobalt.
- Mountain_Skies 6y agoThat about half of the world's production comes from the Congo(DRC) also makes it undesirable. Both because the Congo is unstable but also because it destabilizes the country. It's like a spiral of chaos for them, which is too bad because in theory it should be good for them to have an export that brings in money. The resource curse is unfortunately real.
- d33lio 6y agoI'm surprised a few HNW individuals with the help of the UN haven't just mediated and purchased the land that represents the DRC? It's clear these people have no clue how to control the land, feed their people or prevent war-lords from exploiting their own people for slave labor. Why not setup a situation where the people of the DRC are housed, fed and provided healthcare from the proceeds of their rare-earths while allowing the western beneficiaries to use their military to oust violent barbaric war-lords?
- ajzinsbwbs 6y agoUnfortunately there’s a long history of colonized people being mistreated, so it’s not an easy sell.
- perl4ever 6y agoI think whether it's "an easy sell" is more related to the question of whether it's profitable enough to anyone.
- d33lio 6y agoI acknowledge the horrific history of colonizing / private exploitation of the African continent. Europeans as a whole are 100% on the hook for this. This is also HN, so any mention of this region / situation is just going to result in the poster being downvoted, flagged and labeled every kind of horrible term other users can come up with. However, it's painfully evident that the UN is incapable of keeping the peace or trying to stabilize the region. In short, I'm trying to start a discussion here as to how nations with some sense of diplomacy and interest in these minerals could mediate in a meaningful way. There simply must be a better way. Not to be blunt, but we need a similarly over-regulated private offering equivalent to the "public" option of german healthcare. Curious if an impact fund of some kind could cooperate with NGO's and the UN? The formation of some kind of demilitarized zone? There has to be a way to improve this situation and prevent more of their own people being killed? Mostly in order to prevent China from coming in and clearing house like they have in other regions of Africa.
- recuter 6y agoTú no puedes comprar al viento Tú no puedes comprar al sol Tú no puedes comprar la lluvia Tú no puedes comprar el calor Tú no puedes comprar las nubes Tú no puedes comprar los colores Tú no puedes comprar mi alegría Tú no puedes comprar mis dolores
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- 6y ago
- hwillis 6y agoI can't find a free version (much love to anyone who hosts) but Matt Lacey's energy density estimator is always good for situations like these: http://lacey.se/apps/cell-energy/ http://lacey.se/apps/cell-energy/