eleitl
@eleitl@lemmy.zip
- Comment on New nickel-iron battery charges in seconds, survives 12,000 cycles 7 hours ago:
Quite enough energy density and very good power density for stationary energy storage, with zero fire danger. Reasonably cheap, too.
- Comment on New nickel-iron battery charges in seconds, survives 12,000 cycles 7 hours ago:
It’s more like NiCd but better power and more cycles (and no memory effect).
- Comment on New nickel-iron battery charges in seconds, survives 12,000 cycles 7 hours ago:
Abstract
Downsizing metal nanoparticles into nanoclusters and single atoms represents a transformative approach to maximizing atom utilization efficiency for energy applications. Herein, a bovine serum albumin-templated synthetic strategy is developed to fabricate iron and nickel nanoclusters, which are subsequently hydrothermally composited with graphene oxide. Through KOH-catalyzed pyrolysis, the downsized metal nanoclusters and single atoms are embedded in a hierarchically porous protein/graphene-derived carbonaceous aerogel framework. The carbon-supported Fe subnanoclusters (FeSNC) as the negative electrode and Ni subnanoclusters (NiSNC) as the positive electrode exhibit remarkable specific capacitance (capacity) values of 373 F g−1 (93 mAh g−1) and 1125 F g−1 (101 mAh g−1) at 1.0 A g−1, respectively. Assembled into a supercapacitor-battery hybrid configuration, the device achieves an excellent specific energy (47 W h kg−1) and superior specific power (18 kW kg−1), while maintaining outstanding cycling stability of over 12 000 cycles. Moreover, FeSNCs displayed a significantly reduced oxygen evolution overpotential (η10 = 270 mV), outperforming the RuO2 benchmark (η10 = 328 mV). Molecular dynamics simulations, coupled with density functional theory calculations, offer insights into the dynamic behavior and electronic properties of these materials. This work underscores the immense potential of metallic subnanoclusters for advancing next-generation energy storage and conversion technologies.
- Comment on New nickel-iron battery charges in seconds, survives 12,000 cycles 7 hours ago:
Abstract
Downsizing metal nanoparticles into nanoclusters and single atoms represents a transformative approach to maximizing atom utilization efficiency for energy applications. Herein, a bovine serum albumin-templated synthetic strategy is developed to fabricate iron and nickel nanoclusters, which are subsequently hydrothermally composited with graphene oxide. Through KOH-catalyzed pyrolysis, the downsized metal nanoclusters and single atoms are embedded in a hierarchically porous protein/graphene-derived carbonaceous aerogel framework. The carbon-supported Fe subnanoclusters (FeSNC) as the negative electrode and Ni subnanoclusters (NiSNC) as the positive electrode exhibit remarkable specific capacitance (capacity) values of 373 F g−1 (93 mAh g−1) and 1125 F g−1 (101 mAh g−1) at 1.0 A g−1, respectively. Assembled into a supercapacitor-battery hybrid configuration, the device achieves an excellent specific energy (47 W h kg−1) and superior specific power (18 kW kg−1), while maintaining outstanding cycling stability of over 12 000 cycles. Moreover, FeSNCs displayed a significantly reduced oxygen evolution overpotential (η10 = 270 mV), outperforming the RuO2 benchmark (η10 = 328 mV). Molecular dynamics simulations, coupled with density functional theory calculations, offer insights into the dynamic behavior and electronic properties of these materials. This work underscores the immense potential of metallic subnanoclusters for advancing next-generation energy storage and conversion technologies.
- Comment on New nickel-iron battery charges in seconds, survives 12,000 cycles 7 hours ago:
Abstract
Downsizing metal nanoparticles into nanoclusters and single atoms represents a transformative approach to maximizing atom utilization efficiency for energy applications. Herein, a bovine serum albumin-templated synthetic strategy is developed to fabricate iron and nickel nanoclusters, which are subsequently hydrothermally composited with graphene oxide. Through KOH-catalyzed pyrolysis, the downsized metal nanoclusters and single atoms are embedded in a hierarchically porous protein/graphene-derived carbonaceous aerogel framework. The carbon-supported Fe subnanoclusters (FeSNC) as the negative electrode and Ni subnanoclusters (NiSNC) as the positive electrode exhibit remarkable specific capacitance (capacity) values of 373 F g−1 (93 mAh g−1) and 1125 F g−1 (101 mAh g−1) at 1.0 A g−1, respectively. Assembled into a supercapacitor-battery hybrid configuration, the device achieves an excellent specific energy (47 W h kg−1) and superior specific power (18 kW kg−1), while maintaining outstanding cycling stability of over 12 000 cycles. Moreover, FeSNCs displayed a significantly reduced oxygen evolution overpotential (η10 = 270 mV), outperforming the RuO2 benchmark (η10 = 328 mV). Molecular dynamics simulations, coupled with density functional theory calculations, offer insights into the dynamic behavior and electronic properties of these materials. This work underscores the immense potential of metallic subnanoclusters for advancing next-generation energy storage and conversion technologies.
- Comment on If you are not in a tech field, what got you into self-hosting? 2 days ago:
My first interest was in running Unix for uucp Usenet, early 1980s. Never happened since I was poor, so it took DSL availability some 20+ years ago to run a Debian server at home. Around 1997 I ran my own Linux box on a university network, which ran a web server.
- Comment on I want a phone I can actually fix, and Fairphone’s record growth shows the world does too 3 days ago:
Precious few people bother with alternative ROMs. GOS users are a small subset of that. The impact on new Pixel device sales is very close to zero. In future, there is the promise of a new OEM. I wouldn’t sweat it.
- Comment on I want a phone I can actually fix, and Fairphone’s record growth shows the world does too 3 days ago:
I prefer secure systems. Buy used/refurbished for not supporting Google.
- Comment on Explaining the PeV neutrino fluxes at KM3NeT and IceCube with quasiextremal primordial black holes 4 days ago:
Nice paper.
- Comment on Windows 11 is finally killing off legacy printer drivers in 2026 — and it’s going to shake up a lot of older hardware 4 days ago:
LOL, another reason not to upgrade or to switch to Linux.
- Comment on I want a phone I can actually fix, and Fairphone’s record growth shows the world does too 4 days ago:
No, the Fairphone hardware platform doesn’t meet minimal security features of the GOS project. You could say they chose not to compromise on security rather.
- Comment on I want a phone I can actually fix, and Fairphone’s record growth shows the world does too 4 days ago:
No, currently only on Pixels. Plans to support another future platform exist.
- Comment on New chemical trick pushes perovskite solar cells past 26% record efficiency 6 days ago:
Try buying a commercial silicon PV module with 26%.
- Comment on What's your opinion on Ubiquiti/Unifi gear? 6 days ago:
I run Ubiquity AP (used to be flashed to OpenWRT but now stock) as well as Mikrotik, all local. Firewall is opnsense. NAS is FreeNAS, but not really use it at the moment. zfs is great. If you really need 48 port L3 switches, look into whitebox. I use used enterprise gear for lab, too much noise and power draw and no real use for terabit L3 at home.
- Comment on What's your opinion on Ubiquiti/Unifi gear? 6 days ago:
Use opnsense instead.
- Comment on Estonian state trialing IT system free from US tech giants 6 days ago:
Looks good to me. But without at least some borderline functional (e.g. Hetzner, StackIt) sovereign domestic cloud vendors you’ve still got all your eggs in one US-owned bucket. Everybody knew that, but nobody cared until the rooster crowed.
- Comment on Estonian state trialing IT system free from US tech giants 1 week ago:
You can already deploy free/libre software to proprietary clouds, so that is not a blocker. What is missing is legislation preferring free/libre solutions to proprietary ones, and building up domestic workforce who can directly support them, rather than buying licenses for support of software downstream of open source projects from US vendors.
Cina does it, fat chance of EU being able to do a damn thing though. Particularly tiny, permanently subsidized demographically challenged countries like Estonia.
- Comment on Estonian state trialing IT system free from US tech giants 1 week ago:
You first start with building a domestic cloud infrastructure. And mandating by law use of it for critical services.
- Comment on Should I be using Debian? 1 week ago:
You can install Proxmox on top of Debian. I always do that.
- Comment on France will replace Microsoft Teams, Google Meet, Zoom, Webex and others with its own sovereign video conferencing application "Visio" for public officials 2 weeks ago:
SIP is a nightmare protocol for firewalls. Time to retire it.
- Comment on Android won't kill sideloading after all, but new verification rules will make it harder 3 weeks ago:
I use GrapheneOS (Lineage OS and CyanogenMod before that) and I’m perfectly happy witn alternative software installation sources.
- Comment on Microsoft CEO warns that we must 'do something useful' with AI or they'll lose 'social permission' to burn electricity on it 3 weeks ago:
It’s declaration of moral bancruptcy.
- Comment on Europe is preparing a master plan to shift from proprietary technologies to open source 3 weeks ago:
EU is not synonymous to Europe.
- Comment on US would reach 100% renewable energy by 2148 at current pace 4 weeks ago:
Plot twist: it will be 100% biofuels. In the area currently called the US.
- Comment on Hidden Telegram proxy links can reveal your IP address in one click 4 weeks ago:
It is still a source of information you can’t get anywhere else, but that utility is declining.
- Comment on Home electricity bills are skyrocketing. For data centers, not so much. 5 weeks ago:
If mains goes down they stop feeding in power within 10 ms, or so. Of course, you can illegally feed in more, if you know what you’re doing.
- Comment on Windows 11’s 2025 problems are getting impossible to ignore 1 month ago:
I’ve never used Windows - apart from new workplace requiring it. I largely not see it, unless corporate IT screws up.
- Comment on Where are you running your wireguard endpoint? 1 month ago:
Thanks!
- Comment on Where are you running your wireguard endpoint? 1 month ago:
Who is your VPS provider, if you don’t mind telling?
- Comment on Electrolysis can solve one of our biggest contamination problems 1 month ago:
This is incorrect. Electrolysis uses an electrode which cauterizes the hair follicle with an electric impolse.