Betar Gallant | |
---|---|
Born | Betar Maurkah Gallant |
Alma mater | Massachusetts Institute of Technology |
Awards | National Science Foundation CAREER Award (2021) |
Scientific career | |
Fields | Batteries Li batteries CO₂ conversion [1] |
Institutions | Massachusetts Institute of Technology California Institute of Technology |
Thesis | Layer-by-layer assembled carbon nanotube nanostructures for high-power and high-energy lithium storage (2010) |
Doctoral advisor | Yang Shao-Horn [2] |
Website | gallant |
Betar Maurkah Gallant is an American engineer who is an associate professor at Massachusetts Institute of Technology. [3] Her research investigates the development of new materials for batteries. [1]
Gallant grew up in a scientific family: her mother worked in urban planning and her father worked in engineering. [4] While she was a teenager, Gallant's father died from an illness and she started to read his old physics textbooks. [4] Gallant was an undergraduate at Massachusetts Institute of Technology, and took part in a Undergraduate Research Opportunities Program with Yang Shao-Horn. [4] Together they explored electrochemistry. [4] During 2009, Gallant joined the United States Department of Energy Energy Technology Program, where she led the Regaining our Energy Science and Engineering Edge initiative. [5] RE-ENERGYSE was developed by the Obama White House to educate young Americans in clean energy research. [6] Gallant completed her doctoral research at Massachusetts Institute of Technology, where she developed carbon nanotube structures for lithium batteries supervised by Shao-Horn. [2]
Gallant moved to California Institute of Technology, where she worked as a Kavli Nanoscience Fellow. [4] She was appointed to the faculty at MIT in 2015.[ citation needed ] She initially investigated the incorporation of carbon dioxide into batteries as a strategy to mitigate greenhouse gases. This research led her to investigate the electrochemical reactions of carbon dioxide, and propose new strategies to simplify carbon capture. [7] She pioneered the use of electrochemical strategies to separate carbon dioxide from amine, the sorbent molecule used in carbon capture and storage. She showed that by separating the carbon dioxide and the amine, it was possible to extend the reaction, eventually making a stable solid form of carbon dioxide that was easy to separate. [7] [8] Gallant has studied the mechanisms that underpin the solid electrolyte interphase (SEI). [8]
Despite non-rechargeable batteries being critical in medical devices like pacemakers, so far, innovation in battery research has mainly considered rechargeable batteries. [9] Gallant decided to address this research gap, developing long-lasting non-rechargeable batteries based on fluorinated electrolytes. [9]
A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li+ ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life. Also noteworthy is a dramatic improvement in lithium-ion battery properties after their market introduction in 1991: within the next 30 years, their volumetric energy density increased threefold while their cost dropped tenfold.
A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air. During discharge, a mass of zinc particles forms a porous anode, which is saturated with an electrolyte. Oxygen from the air reacts at the cathode and forms hydroxyl ions which migrate into the zinc paste and form zincate, releasing electrons to travel to the cathode. The zincate decays into zinc oxide and water returns to the electrolyte. The water and hydroxyl from the anode are recycled at the cathode, so the water is not consumed. The reactions produce a theoretical voltage of 1.65 Volts, but is reduced to 1.35–1.4 V in available cells.
Nanobatteries are fabricated batteries employing technology at the nanoscale, particles that measure less than 100 nanometers or 10−7 meters. These batteries may be nano in size or may use nanotechnology in a macro scale battery. Nanoscale batteries can be combined to function as a macrobattery such as within a nanopore battery.
A paper battery is engineered to use a spacer formed largely of cellulose. It incorporates nanoscopic scale structures to act as high surface-area electrodes to improve conductivity.
A nanowire battery uses nanowires to increase the surface area of one or both of its electrodes, which improves the capacity of the battery. Some designs, variations of the lithium-ion battery have been announced, although none are commercially available. All of the concepts replace the traditional graphite anode and could improve battery performance. Each type of nanowire battery has specific advantages and disadvantages, but a challenge common to all of them is their fragility.
A lithium-ion capacitor is a hybrid type of capacitor classified as a type of supercapacitor. It is called a hybrid because the anode is the same as those used in lithium-ion batteries and the cathode is the same as those used in supercapacitors. Activated carbon is typically used as the cathode. The anode of the LIC consists of carbon material which is often pre-doped with lithium ions. This pre-doping process lowers the potential of the anode and allows a relatively high output voltage compared to other supercapacitors.
The lithium–sulfur battery is a type of rechargeable battery. It is notable for its high specific energy. The low atomic weight of lithium and moderate atomic weight of sulfur means that Li–S batteries are relatively light. They were used on the longest and highest-altitude unmanned solar-powered aeroplane flight by Zephyr 6 in August 2008.
A solid-state battery is an electrical battery that uses a solid electrolyte for ionic conductions between the electrodes, instead of the liquid or gel polymer electrolytes found in conventional batteries. Solid-state batteries theoretically offer much higher energy density than the typical lithium-ion or lithium polymer batteries.
The lithium–air battery (Li–air) is a metal–air electrochemical cell or battery chemistry that uses oxidation of lithium at the anode and reduction of oxygen at the cathode to induce a current flow.
A potassium-ion battery or K-ion battery is a type of battery and analogue to lithium-ion batteries, using potassium ions for charge transfer instead of lithium ions. It was invented by the Iranian/American chemist Ali Eftekhari in 2004.
Sodium-ion batteries (NIBs, SIBs, or Na-ion batteries) are several types of rechargeable batteries, which use sodium ions (Na+) as its charge carriers. In some cases, its working principle and cell construction are similar to those of lithium-ion battery (LIB) types, but it replaces lithium with sodium as the intercalating ion. Sodium belongs to the same group in the periodic table as lithium and thus has similar chemical properties. Although, in some cases (such as aqueous Na-ion batteries) they are quite different from Li-ion batteries.
Research in lithium-ion batteries has produced many proposed refinements of lithium-ion batteries. Areas of research interest have focused on improving energy density, safety, rate capability, cycle durability, flexibility, and cost.
Flexible batteries are batteries, both primary and secondary, that are designed to be conformal and flexible, unlike traditional rigid ones. They can maintain their characteristic shape even against continual bending or twisting. The increasing interest in portable and flexible electronics has led to the development of flexible batteries which can be implemented in products such as smart cards, wearable electronics, novelty packaging, flexible displays and transdermal drug delivery patches. The advantages of flexible batteries are their conformability, light weight, and portability, which makes them easy to be implemented in products such as flexible and wearable electronics. Hence efforts are underway to make different flexible power sources including primary and rechargeable batteries with high energy density and good flexibility.
Lithium–silicon batteries are lithium-ion battery that employ a silicon-based anode and lithium ions as the charge carriers. Silicon based materials generally have a much larger specific capacity, for example 3600 mAh/g for pristine silicon, relative to the standard anode material graphite, which is limited to a maximum theoretical capacity of 372 mAh/g for the fully lithiated state LiC6.
The glass battery is a type of solid-state battery. It uses a glass electrolyte and lithium or sodium metal electrodes.
Yang Shao-Horn is a Chinese American scholar, Professor of Mechanical Engineering and Materials Science and Engineering and a member of Research Laboratory of Electronics at the Massachusetts Institute of Technology. She is known for research on understanding and controlling of processes for storing electrons in chemical bonds towards zero-carbon energy and chemicals.
Ying Shirley Meng is a Singaporean-American materials scientist and academic. She is a professor at the Pritzker School of Molecular Engineering at the University of Chicago and Argonne Collaborative Center for Energy Storage Science (ACCESS) chief scientist at Argonne National Laboratory. Meng is the author and co-author of more than 300 peer-reviewed journal articles, two book chapter and six patents. She serves on the executive committee for battery division at the Electrochemical Society and she is the Editor-in-Chief for MRS Energy & Sustainability.
Lynden A. Archer is a chemical engineer, Joseph Silbert Dean of Engineering, David Croll Director of the Energy Systems Institute, and professor of chemical engineering at Cornell University. He became a fellow of the American Physical Society in 2007 and was elected into the National Academy of Engineering in 2018. Archer's research covers polymer and hybrid materials and finds applications in energy storage technologies. His h-index is 92 by Google Scholar.
A solid-state silicon battery or silicon-anode all-solid-state battery is a type of rechargeable lithium-ion battery consisting of a solid electrolyte, solid cathode, and silicon-based solid anode.
Karim Zaghib is an Algerian-Canadian electrochemist and materials scientist known for his contributions to the field of energy storage and conversion. He is currently Professor of Chemical and Materials Engineering at Concordia University. As former director of research at Hydro-Québec, he helped to make it the world’s first company to use lithium iron phosphate in cathodes, and to develop natural graphite and nanotitanate anodes.