A5042422633- Advanced Thermoelectric Materials and Devices
- Solar-Powered Water Purification Methods
- Membrane Separation Technologies
- Conducting polymers and applications
- Solar Thermal and Photovoltaic Systems
- Thermal properties of materials
- Adsorption and Cooling Systems
- Thermal Radiation and Cooling Technologies
- Phase Change Materials Research
- Advanced Sensor and Energy Harvesting Materials
- Water-Energy-Food Nexus Studies
- Membrane-based Ion Separation Techniques
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Building Energy and Comfort Optimization
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Thermal Expansion and Ionic Conductivity
- Advanced Thermodynamics and Statistical Mechanics
- Heat Transfer and Optimization
- Transition Metal Oxide Nanomaterials
- Radiative Heat Transfer Studies
- Innovative Energy Harvesting Technologies
- Solar Energy Systems and Technologies
- Energy Harvesting in Wireless Networks
- Process Optimization and Integration
Energy Storage Systems (United States)
2025
Lawrence Berkeley National Laboratory
2019-2025
Georgia Institute of Technology
2015-2025
University of California, Berkeley
2023
Atlanta Technical College
2023
Texas A&M University at Qatar
2012-2013
In this work, we demonstrate a 3-dimensional graphene oxide (3D GO) stalk that operates near the capillary wicking limit to achieve an evaporation flux of 34.7 kg m-2 h-1 under 1 sun conditions (1 kW/m2). This represents nearly 100 times enhancement over conventional solar pond. Interfacial traditionally uses 2D evaporators vaporize water using sunlight, but their low evaporative limits practical applicability for desalination. Some recent studies 3D potential more efficient transfer,...
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
Abstract This study reports on the thermoelectric properties of poly(3‐alkylchalcogenophene) thin films (500 nm) as a function heteroatom (sulfur, selenium, tellurium), and how these change with dopant (ferric chloride) concentration. UV–vis–NIR spectroscopy shows that polaronic charge carriers are formed upon doping. Poly(3‐alkyltellurophene) (P3RTe) is most easily doped followed by poly(3‐alkylselenophene) (P3RSe) poly(3‐alkylthiophene) (P3RT), where R = 3,7‐dimethyloctyl chain pendant...
Abstract Integrating thermoelectric generators (TEGs) into textiles is attractive for body heat harvesting to power wearable electronics. Textile‐integrated TEGs have the advantage of conformity that ensures efficient transfer and does not impede movement. Additive printing techniques solution processable polymer‐based (TE) materials can be used this purpose. However, a number fabrication challenges limit realization printed textile TEG using low cost, scalable, compatible process. In work,...
The processability and electronic properties of conjugated polymers (CPs) have become increasingly important due to the potential these materials in redox solid-state devices for a broad range applications. To solubilize CPs, side chains are needed, but such reduce relative fraction electroactive material film, potentially obstructing π-π intermolecular interactions, localizing charge carriers, compromising desirable optoelectronic properties. deleterious effects chains, we demonstrate that...
A thermodynamic and technoeconomic analysis reveals that desalination can produce freshwater at a lower energy footprint levelized cost compared to atmospheric water harvesting.
Forward osmosis (FO) desalination using thermoresponsive ionic liquid (IL)-water mixtures is a promising technology for treating nontraditional water sources. However, its demonstration has primarily been at the lab-scale, with flux and recovery values that are not representative of realistic applications. In this work, performance tetrabutyl-phosphonium trifluoroacetate (P4444TFA), as well new dual draw P4444TFA tetrabutyl-ammonium (N4444TFA) characterized. The combines higher osmolality...
Thermoelectrics represent a unique opportunity in energy to directly convert thermal or secondary waste heat into primary resource. The development of thermoelectric materials has improved over the decades leaps, rather than by increments—each leap forward recapitulated science its time: from crystal growth semiconductors, controlled doping, nanostructuring, and 2D confinement. Each those leaps was, arguably, more result physics. is now ripe for another forward, many probable advances rely...
ABSTRACT Electrically conducting polymers are attractive for thermoelectric generators (TEGs) because of their low thermal conductivity and solution processability. In this article, we report on the performance a radial device made from n‐ p‐type printed paper substrates. Our (TE) models predict an optimized geometry that operates under natural convective cooling alone, herein, fabrication new organic TEG. We used poly(nickel‐1,1,2,2‐ethenetetrathiolate) blended with poly(vinylidene...
Thermoelectric generators (TEGs) are solid-state heat engines consisting of p-type and n-type semiconductors that convert into electricity via the Seebeck effect. Conducting polymers a viable alternative with intrinsic advantages over their inorganic counterparts, since they abundant, flexible as thick-films, have reduced manufacturing costs due to solution processing. Furthermore, an inherently low thermal conductivity, thus affording them option forgoing some exchanger costs. Current...
Abstract Conjugated polymers with high electrical conductivities are attractive for applications in capacitors, biosensors, organic thermoelectrics, and transparent electrodes. Here, a series of solution processable dioxythiophene copolymers based on 3,4‐propylenedioxythiophene (ProDOT) 3,4‐ethylenedioxythiophene (EDOT) is investigated as thermoelectric electrode materials. Through structural manipulation the polymer repeat unit, conductivity upon oxidative doping tuned from 1 × 10 −3 to 3 S...
Organic-inorganic hybrids have recently emerged as a class of high-performing thermoelectric materials that are lightweight and mechanically flexible. However, the fundamental electrical thermal transport in these has remained elusive due to heterogeneity bulk, polycrystalline, thin films reported thus far. Here, we systematically investigate model hybrid comprising single core/shell nanowire Te-PEDOT:PSS. We show diameter is reduced, conductivity increases decreases, while Seebeck...
Growing global water demand has brought desalination technologies to the forefront for freshwater production from nontraditional sources. Among these, forward osmosis (FO) is a promising two-step process (draw dilution and regeneration), but it often overlooked due energy requirements associated with draw regeneration. To address this limiting factor, we demonstrate FO using thermally responsive ionic liquids (ILs) that are regenerated renewable input, is, solar heat. efficiently harness...
Abstract Nickel ethenetetrathiolate (NiETT) polymers are promising n‐type thermoelectric (TE) materials, but their insolubility requires the use of an inert polymer matrix to form films, which is detrimental TE performance. In this work, thermal annealing as a post‐treatment process simultaneously enhances electrical conductivity from 6 ± 2 23 3 S cm −1 and thermopower −28 −74 4 µV K for NiETT/PVDF composite films. Spectroscopic characterization reveals that underlying mechanism involves...
The absence of affordable and deployable large-scale energy storage poses a major barrier to providing zero-emission on demand for societal decarbonization. High temperature thermal is one promising option with low cost high scalability, but it hindered by the inherent complexity simultaneously satisfying all material requirements. Here we design class ceramic–carbon composites based co-optimizing mechanical, electrical, properties. These demonstrate stability in soak-and-hold tests direct...