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Leroy Cronin - One of the best experts on this subject based on the ideXlab platform.

  • highly reduced and protonated aqueous solutions of p2w18o62 6 for on demand hydrogen generation and Energy storage
    Nature Chemistry, 2018
    Co-Authors: Jiajia Chen, Mark D Symes, Leroy Cronin
    Abstract:

    As our reliance on renewable Energy sources grows, so too does our need to store this Energy to mitigate against troughs in supply. Energy storage in batteries or by conversion to chemical fuels are the two most flexible and scalable options, but are normally considered mutually exclusive. Energy storage solutions that can act as both batteries and fuel generation devices (depending on the requirements of the user) could therefore revolutionize the uptake and use of renewably Generated Energy. Here, we present a polyoxoanion, [P2W18O62]6−, that can be reversibly reduced and protonated by 18 electrons/H+ per anion in aqueous solution, and that can act either as a high-performance redox flow battery electrolyte (giving a practical discharged Energy density of 225 Wh l−1 with a theoretical Energy density of more than 1,000 Wh l−1), or as a mediator in an electrolytic cell for the on-demand generation of hydrogen.

  • highly reduced and protonated aqueous solutions of p 2 w 18 o 62 6 for on demand hydrogen generation and Energy storage
    Nature Chemistry, 2018
    Co-Authors: Jiajia Chen, Mark D Symes, Leroy Cronin
    Abstract:

    As our reliance on renewable Energy sources grows, so too does our need to store this Energy to mitigate against troughs in supply. Energy storage in batteries or by conversion to chemical fuels are the two most flexible and scalable options, but are normally considered mutually exclusive. Energy storage solutions that can act as both batteries and fuel generation devices (depending on the requirements of the user) could therefore revolutionize the uptake and use of renewably Generated Energy. Here, we present a polyoxoanion, [P2W18O62]6−, that can be reversibly reduced and protonated by 18 electrons/H+ per anion in aqueous solution, and that can act either as a high-performance redox flow battery electrolyte (giving a practical discharged Energy density of 225 Wh l−1 with a theoretical Energy density of more than 1,000 Wh l−1), or as a mediator in an electrolytic cell for the on-demand generation of hydrogen.

Li Wang - One of the best experts on this subject based on the ideXlab platform.

  • waste heat recovery method for the air pre purification system of an air separation unit
    Applied Thermal Engineering, 2018
    Co-Authors: Lige Tong, Pei Zhang, Shao Wu Yin, Peikun Zhang, Chuan Ping Liu, Li Wang
    Abstract:

    Abstract A novel three-bed temperature swing adsorber was built to recover low-temperature waste heat from heat- and cold-blowing stages in a double molecular sieve of an air pre-purification system. The regenerative mass transfer in the adsorption bed was divided, and the temperature and concentration breakthrough curves of the adsorber regenerator were obtained via an experiment. Experimental results show that the relationship between the starting point and the Energy of waste heat recovery is parabolic. However, Energy saving reached the peak at 52.5% when the starting point of heat recovery was 23 min; this result would yield additional H2O and CO2 into the bed, thereby affecting the purification effect of the absorbers. The starting time of exhaust gas recycling for limit waste heat recovery strategy was 26 min, which resulted in 51.1% Energy savings by recycling different stages of regeneration exhaust. The starting time of exhaust gas recycling for the optimal heat recovery strategy was 29 min, in which Energy saving reached 46.5%. The starting time of exhaust gas recycling for the best regeneration strategy was 35 min, which Generated Energy saving of 29.8%.

  • analysis of a novel autonomous marine hybrid power generation Energy storage system with a high voltage direct current link
    Journal of Power Sources, 2008
    Co-Authors: Li Wang, Zhe Chen
    Abstract:

    This paper presents both time-domain and frequency-domain simulated results of a novel marine hybrid renewable-Energy power generation/Energy storage system (PG/ESS) feeding isolated loads through an high-voltage direct current (HVDC) link. The studied marine PG subsystems comprise both offshore wind turbines and Wells turbines to respectively capture wind Energy and wave Energy from marine wind and ocean wave. In addition to wind-turbine generators (WTGs) and wave-Energy turbine generators (WETGs) employed in the studied system, diesel-engine generators (DEGs) and an aqua electrolyzer (AE) absorbing a part of Generated Energy from WTGs and WETGs to generate available hydrogen for fuel cells (FCs) are also included in the PG subsystems. The ES subsystems consist of a flywheel Energy storage system (FESS) and a compressed air Energy storage (CAES) system to balance the required Energy in the hybrid PG/ESS. It can be concluded from the simulation results that the proposed hybrid marine PG/ESS feeding isolated loads can stably operate to achieve system power-frequency balance condition.

  • small signal stability analysis of an autonomous hybrid renewable Energy power generation Energy storage system part i time domain simulations
    IEEE Transactions on Energy Conversion, 2008
    Co-Authors: Dongjing Lee, Li Wang
    Abstract:

    Small-signal stability analyzed results of an autonomous hybrid renewable Energy power generation/Energy storage system connected to isolated loads using time-domain simulations is presented in this paper. The companion paper presents frequency-domain analyzed results of the same hybrid system. The proposed renewable Energy power generation subsystems include three wind turbine generators (WTGs), a diesel engine generator, two fuel cells (FCs), and a photovoltaic system (PV) while the Energy storage subsystems consist of a battery Energy storage system and a flywheel Energy storage system. An aqua electrolyzer absorbs a part of Generated Energy from PV or WTGs to generate available hydrogen for FCs. A time-domain approach based on three mathematical models for three studied cases under various operating points and disturbance conditions is performed. It can be concluded from the simulation results that the proposed hybrid power generation/Energy storage system feeding isolated loads can be properly operated to achieve system power-frequency balance condition.

Jiajia Chen - One of the best experts on this subject based on the ideXlab platform.

  • highly reduced and protonated aqueous solutions of p2w18o62 6 for on demand hydrogen generation and Energy storage
    Nature Chemistry, 2018
    Co-Authors: Jiajia Chen, Mark D Symes, Leroy Cronin
    Abstract:

    As our reliance on renewable Energy sources grows, so too does our need to store this Energy to mitigate against troughs in supply. Energy storage in batteries or by conversion to chemical fuels are the two most flexible and scalable options, but are normally considered mutually exclusive. Energy storage solutions that can act as both batteries and fuel generation devices (depending on the requirements of the user) could therefore revolutionize the uptake and use of renewably Generated Energy. Here, we present a polyoxoanion, [P2W18O62]6−, that can be reversibly reduced and protonated by 18 electrons/H+ per anion in aqueous solution, and that can act either as a high-performance redox flow battery electrolyte (giving a practical discharged Energy density of 225 Wh l−1 with a theoretical Energy density of more than 1,000 Wh l−1), or as a mediator in an electrolytic cell for the on-demand generation of hydrogen.

  • highly reduced and protonated aqueous solutions of p 2 w 18 o 62 6 for on demand hydrogen generation and Energy storage
    Nature Chemistry, 2018
    Co-Authors: Jiajia Chen, Mark D Symes, Leroy Cronin
    Abstract:

    As our reliance on renewable Energy sources grows, so too does our need to store this Energy to mitigate against troughs in supply. Energy storage in batteries or by conversion to chemical fuels are the two most flexible and scalable options, but are normally considered mutually exclusive. Energy storage solutions that can act as both batteries and fuel generation devices (depending on the requirements of the user) could therefore revolutionize the uptake and use of renewably Generated Energy. Here, we present a polyoxoanion, [P2W18O62]6−, that can be reversibly reduced and protonated by 18 electrons/H+ per anion in aqueous solution, and that can act either as a high-performance redox flow battery electrolyte (giving a practical discharged Energy density of 225 Wh l−1 with a theoretical Energy density of more than 1,000 Wh l−1), or as a mediator in an electrolytic cell for the on-demand generation of hydrogen.

Chris Van Hoof - One of the best experts on this subject based on the ideXlab platform.

  • Integrated capacitive power-management circuit for thermal harvesters with output Power 10 to 1000μW
    Digest of Technical Papers - IEEE International Solid-State Circuits Conference, 2009
    Co-Authors: I. Doms, Rita Mertens, Patrick Merken, Chris Van Hoof
    Abstract:

    Energy harvesters power Energy-autonomous wireless sensor systems by converting ambient environmental Energy into electrical Energy. Thermoelectric generators (TEG's) are a suitable compact power supply for both on-the-body and industrial sensors. Due to changing conditions, the Generated power and voltage vary. Therefore a power management circuit (PMC) has to store the Generated Energy in a rechargeable battery or capacitor. It contains a DC/DC-converter with variable conversion factor and a controller that sets the conversion factor.

  • capacitive power management circuit for micropower thermoelectric generators with a 2 1μw controller
    International Solid-State Circuits Conference, 2008
    Co-Authors: I. Doms, Rita Mertens, Patrick Merken, Chris Van Hoof
    Abstract:

    Energy scavenging is an emerging method to power Energy-autonomous wireless sensor systems by converting ambient environmental Energy into electrical Energy. Miniature as well as micro-machined thermoelectric generators (TEG) can become a suitable compact power supply for both on-the-body and industrial sensors. To minimize the overall size of the power supply, the generator has to work at its maximum power point. Due to varying thermal conditions, the Generated power and voltage are not constant. Typically the output voltage is lower than the power supply voltage of the sensor. For these reasons, a power management circuit (PMC) with maximum power-point tracking capability and containing a DC/DC-converter with variable conversion factor is required that stores the Generated Energy in a rechargeable battery or capacitor.

Zhong Lin Wang - One of the best experts on this subject based on the ideXlab platform.

  • transparent and flexible self charging power film and its application in a sliding unlock system in touchpad technology
    ACS Nano, 2016
    Co-Authors: Jianjun Luo, Wei Tang, Fengru Fan, Chaofeng Liu, Yaokun Pang, Guozhong Cao, Zhong Lin Wang
    Abstract:

    Portable and wearable personal electronics and smart security systems are accelerating the development of transparent, flexible, and thin-film electronic devices. Here, we report a transparent and flexible self-charging power film (SCPF) that functions either as a power generator integrated with an Energy storage unit or as a self-powered information input matrix. The SCPF possesses the capability of harvesting mechanical Energy from finger motions, based on the coupling between the contact electrification and electrostatic induction effects, and meanwhile storing the Generated Energy. Under the fast finger sliding, the film can be charged from 0 to 2.5 V within 2094 s and discharge at 1 μA for approximately 1630 s. Furthermore, the film is able to identify personal characteristics during a sliding motion by recording the electric signals related to the person’s individual bioelectricity, applied pressing force, sliding speed, and so on, which shows its potential applications in security systems in touchp...

  • solution processed flexible hybrid cell for concurrently scavenging solar and mechanical energies
    Nano Energy, 2015
    Co-Authors: Yuanxing Fang, Jinhui Tong, Qize Zhong, Qiao Chen, Jun Zhou, Qiuping Luo, Yinhua Zhou, Zhong Lin Wang
    Abstract:

    Flexible device that can harvest renewable Energy from environment is urgently needed nowadays. A satisfactory device should be able to harvest multi-type energies around the clock without any economic difficulties for mass production. Here we report an all solution processed flexible hybrid cell by integrating an organic solar cell and triboelectric nanogenerator into a thin film, which is capable to convert both of the solar and mechanical energies into electric power independently or simultaneously, the Generated Energy can be used either to charge an Energy storage unit or as a primary Energy source for wearable self-powered devices even in the weak light conditions. This work provides a feasible and scalable method to fabricate the hybrid Energy devices within reasonable cost to overcome the environmental restrictions of the devices that the mode of harvest single Energy form.