CATL has announced a new “condensed” battery with 500 Wh/kg

Post by msravi » Fri, Apr 21, 2023, 9:11 AM UTC

onion2k wrote: post #185

msravi wrote: post #133

I just realized how much energy efficiency is being squeezed out of a Tesla. It's incredible. A normal diesel fueled sedan such as the Chevy Cruze diesel runs at about 31mpg, which is 13.2 km/l or 15.3 km/kg. Diesel has a mind-boggling 12700 Wh/kg energy density[1], which translates to an efficiency of ~827 Wh/km for the Chevy. By contrast, the Tesla Model S, has a ~540 kg battery[2]. At 272 Wh/kg (from the posted ar…

BMW claim that a diesel 3 series will get 61mpg. Volkswagen reckon a Golf 2.0 TDI will do 68mpg. Electric is still significantly better, but you didn't need pick a terrible diesel car as an example.

Post by mdp2021 » Fri, Apr 21, 2023, 9:13 AM UTC

matsemann wrote: post #219

vixen99 wrote: post #208

Earlier quoted context omitted.

Important also to consider the degree to which we choose (while improving our own environment) to get others to pollute on our behalf and suffer the consequences - as in the extensive environmental damage caused by lithium and cobalt mining. This is not an argument against EV or renewables by any means but let's ensure we maintain a realistic assessment of all pros and cons. Up to 70% of cobalt is produced in the Con…

Yup, best would be to get rid of the car dependence. Make walk-able cities for people, not cities designed for cars.

Post by londons_explore » Fri, Apr 21, 2023, 9:19 AM UTC

ly3xqhl8g9 wrote: post #159

oblio wrote: post #147

Earlier quoted context omitted.

I wonder how close to mass production those intermediary technologies are. Bumping the energy density closer to something like lithium-sulfur would probably make 95% of ICE-based technology scrap heap tech.

Iron-air batteries (1,200 Wh/kg), and in general metal-air [1], might bring a surprise after 2024: December 2022, "Form Energy will site first American iron-air battery manufacturing plant in Weirton, West Virginia" [2]. [1] 2017, Yanguang Li, Jun Lu, Metal–Air Batteries: Will They Be the Future Electrochemical Energy Storage Device of Choice? https://pubs.acs.org/doi/10.1021/acsenergylett.7b00119 Betteridge's law of…

Post by Moldoteck » Fri, Apr 21, 2023, 9:20 AM UTC

mg wrote: post #64

Key numbers: They doubled Wh/kg from about 280 to about 500. I assume that thinking about battery capacity form first principles, the theoretical limit is reached when the charged battery consists of 50% matter and 50% antimatter, right? Then during discharge, the reaction between the two would turn the matter/antimatter into energy. How would that stack up against the 500Wh/kg stated here? Update: Did a bit of googl…

Post by baq » Fri, Apr 21, 2023, 9:23 AM UTC

regularfry wrote: post #180

baq wrote: post #49

Earlier quoted context omitted.

If the tech takes off (pun intended) every major airport will need a SMR. Which is maybe good? But politically impractical today .

Less of the "S". With current flight patterns you need multiple gigawatts. Calculations based on 737s leaving Gatwick: Energy density of the fuel: 9.6kWh/L 900 flights per day = one flight every 96 seconds 26024.706L per flight Total energy per flight: 9.6 x 26024.706kWh = 250MWh give or take = 900GJ Total power supplied from Gatwick in the form of aviation fuel: 900GJ/96s = 9.375GW. That's not only outside the range…