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Allotrope Energy Introduces Supercapacitors That Double Performance And Reduce Costs For Hybrid Powertrains
Allotrope Energy has unveiled a new type of supercapacitor that boasts twice the energy density of existing models. This advancement could pave the way for a new generation of hybrid powertrains. These powertrains would recover more energy and offer greater power assistance, all while being more cost-effective and easier to integrate.
Supercapacitors can store energy much faster than traditional batteries, making them ideal for regenerative braking systems in hybrid-electric vehicles. However, their lower energy density has limited their use in the automotive industry, which often relies on conventional batteries instead.
The breakthrough by Allotrope Energy is attributed to Lignavolt, a sustainably-produced nano-porous carbon with a large surface area. Typical supercapacitors have an energy density of about 7-8 Wh/kg. In contrast, Allotrope’s supercapacitors have demonstrated 14-15 Wh/kg in third-party tests, offering double the performance at a reduced cost.
Dr Peter Wilson, Founder of Allotrope Energy, explained that capturing all available energy during moderate braking would require an impractically large lithium-ion battery. He stated, "The ability to deal with sudden surges of power safely is still beyond most battery technologies." A Lignavolt-based supercapacitor can instantly recover all that energy using a compact pack weighing only a few kilos.
These supercapacitors can deliver power quickly, enabling more powerful electric motors that provide greater assistance. A 1kg Lignavolt supercapacitor could offer 75bhp of electrical assistance—50 times that of an equivalent lithium-ion battery. This allows more acceleration from the electric motor and enables pairing with smaller combustion engines for further fuel and emissions savings.
Doubling the output of an average internal combustion engine (ICE)-powered family SUV would require a supercapacitor weighing no more than 4kg. This innovation holds promise for significant improvements in vehicle efficiency and performance.
Sustainability and Longevity Benefits
Supercapacitors are inherently stable and do not require complex thermal management systems. Their lifespan far exceeds that of batteries, even under heavy-duty use. Additionally, their production does not involve materials like rare earths. Lignavolt is refined from a pulp industry co-product, making it highly sustainable.
Allotrope Energy has started providing evaluation cells to industry partners. Early results indicate significant potential for transforming automotive applications through these advanced supercapacitors.
Founded in 2016, Allotrope Energy focuses on unlocking opportunities in advanced battery carbons as next-generation battery technology evolves. By leveraging sustainable carbon raw materials, they have addressed bottlenecks in various technologies, including EDLC devices and solid-state lithium-ion batteries.
In 2022, Suzano Papel e Cellulose invested in Allotrope to become a leading developer of advanced battery carbons. The company now leads this emerging industry with ongoing projects in hybrid automotive and rapid-charge devices.
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