EEStor is a company based in Cedar Park, Texas, United States that claims to have developed a superior type of capacitor for electricity storage, which EEStor calls ‘Electrical Energy Storage Units’ (EESU). Its CEO and president is Richard Weir, who is also a co-inventor named on their principal technology patent.
These units use barium titanate coated with aluminum oxide and glass to achieve a level of capacitance claimed to be much higher than what is currently available in the market. The claimed energy density is 1.0 MJ/kg (existing commercial supercapacitors typically have an energy density of around 0.01 MJ/kg, while lithium ion batteries have an energy density of around 0.54–0.72 MJ/kg).
Based on these claims, a five-minute charge should give the capacitor sufficient energy to drive a small car 300 miles (480 km). However, standard household wiring is not capable of delivering the power required for this, so charging times this short would probably require purpose-built high capacity dispensing stations. Overnight charging at home should still be practical, as is using a second EESU for the home which could be charged overnight using cheap, off-peak electricity to then charge the EEStor unit in the car in 5-10 minutes on demand. Also according to Ian Clifford a normal household outlet with 110 volt supply can fully charge the EESTor powered CityZENN in 4 hours for a 250 mile range and a normal household outlet with 220 volt supply can fully charge the EESTor powered CityZENN in 2 hours for a 250 mile range. CityZENN target price is around $25000 – $30000.
Not sure if this will ever actually work, or if it is just hype? I think LS9 has a better chance to revolutionize our energy supply.
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