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| Supercapacitor | |
|---|---|
| Name | Supercapacitor |
| Type | Energy storage device |
Supercapacitor A supercapacitor is an electrochemical energy storage device that bridges the gap between Edmond Becquerel's observations and modern Nikola Tesla-era innovations, offering high power density for applications from Toyota hybrid systems to NASA spacecraft. It complements technologies pioneered by Alessandro Volta, advanced by institutions like MIT and Stanford University, and commercialized by firms such as Maxwell Technologies and Panasonic. Supercapacitors play roles in projects involving Siemens, General Electric, Bosch, and research at University of Cambridge and Tsinghua University.
Supercapacitors emerged from developments in Wilhelm Hittorf-era electrochemistry and the work of researchers at Union Carbide and Eaton Corporation, evolving alongside batteries studied at Bell Labs and capacitors used in RCA electronics. They are integral to systems deployed by Siemens for regenerative braking on Siemens Velaro trains and in grid-support experiments by European Investment Bank-funded consortia. Commercial interest from Volkswagen, BMW, and Daimler AG accelerated integration into automotive platforms alongside research at Lawrence Berkeley National Laboratory and Argonne National Laboratory.
Electric double-layer capacitors (EDLCs), pseudocapacitors, and hybrid capacitors represent principal types developed in labs such as Los Alamos National Laboratory and Oak Ridge National Laboratory. EDLCs store charge via electrostatic separation at interfaces studied in contexts like Maxwell Technologies prototypes and modeled in publications from IEEE. Pseudocapacitors use faradaic redox reactions often investigated at CNRS and Fraunhofer Society facilities. Hybrid devices combine asymmetric electrodes inspired by work at Princeton University and Harvard University to balance energy and power metrics used in Siemens demonstrations and Hitachi prototypes.
Electrode materials include activated carbon derived from sources researched at University of Queensland and graphene explored at University of Manchester following Andre Geim and Konstantin Novoselov's discoveries. Metal oxides like ruthenium oxide studied at Brookhaven National Laboratory and manganese dioxide used in projects by 3M and Toshiba enable pseudocapacitance. Conductive polymers evaluated at Imperial College London and ETH Zurich serve in flexible devices tested by Nokia and Samsung. Separators and electrolytes reflect contributions from DuPont and BASF with aqueous, organic, and ionic liquid electrolytes commercialized by firms such as Acros Organics and examined in reports from European Commission research programs.
Key metrics—energy density, power density, cycle life, equivalent series resistance (ESR), and coulombic efficiency—are benchmarked in standards from IEC and UL and compared to lithium-ion cells produced by Panasonic and LG Chem. Cycle life records in studies at Sandia National Laboratories and NREL often surpass those of Tesla cells, while energy density improvements trace to materials breakthroughs reported by Nature and Science. Thermal stability and safety analyses are conducted in collaboration with Underwriters Laboratories and ISO committees, informing deployment in projects funded by DOE and implemented by ABB.
Supercapacitors support regenerative braking in vehicles by Alstom, energy smoothing in renewable installations by Vestas and Siemens Gamesa, and pulse-power demands in aerospace projects with Airbus and Lockheed Martin. They are used in consumer electronics by Sony and Samsung Electronics for power backup, in industrial robotics by ABB and KUKA for rapid actuation, and in grid services demonstrated by National Grid and E.ON. Military platforms from BAE Systems and Raytheon Technologies employ them for directed-energy and tactical systems, while research collaborations involving European Space Agency and JAXA explore spaceflight applications.
Manufacturing lines at companies like Maxwell Technologies, Skeleton Technologies, Nawa Technologies, and LS Mtron integrate electrode coating, roll-to-roll assembly, and electrolyte filling techniques pioneered in partnerships with Fraunhofer Society and CEA. Commercial scaling efforts receive investment from European Investment Bank and venture capital firms backing startups incubated by Y Combinator and Plug and Play Tech Center. Supply chains leverage raw carbon sources processed by Sasol and catalyst expertise from Johnson Matthey, while product certification follows testing regimes established by UL Solutions and TÜV Rheinland.
Challenges include improving energy density to rival cells from Panasonic and LG Energy Solution, reducing cost structures influenced by commodity markets tracked by Bloomberg, and ensuring sustainable sourcing aligned with policies from European Commission and initiatives like C40 Cities. Future directions—driven by collaborations between MIT, Caltech, University of Tokyo, and industry partners including Toyota Research Institute—focus on graphene-scale electrodes, solid-state electrolytes, and hybrid architectures validated in pilot projects with EDF and Siemens Energy. Breakthroughs may inform standards by IEC and deployment in megawatt-scale storage with operators such as National Grid ESO and California Independent System Operator.
Category:Energy storage devices