Battelle Memorial Institute

Yuyan Shao

Jun Liu

Wei Wang

Gordon Lee Graff

Dongping Lu

Jie Xiao

Wu Xu

Jiguang Zhang

Guosheng Li

Tianbiao Liu

Qian Huang

Ji-Guang Zhang

Zimin Nie

Zhenguo Yang

Wendy D Bennett

Fei Ding

Jianming Zheng

Xilin Chen

Ruozhu Feng

Litao Yan

Aaron M Hollas

Xin Zhang

Vijay Murugesan

Nadeesha P Nambukara Wellala

Xiaohong Xie

Catalysts comprising MoP and MoPare disclosed, wherein the catalyst is a composite. The catalyst may have a molar ratio of MoP:MoPwithin a range of 5:95 to 95:5. The catalyst may be used as a cathode active material for hydrogen generation from neutral pH solutions, such as wastewater or seawater. Methods of making the catalyst also are disclosed.

Nonprecious metal catalyst for hydrogen production from neutral solutions

Aqueous electrolytes comprising fluorenone/fluorenol derivatives are disclosed. The electrolyte may be an anolyte for an aqueous redox flow battery. In some embodiments, the compound, or salt thereof, has a structure according to any one of formulas I-III where Q-Qindependently are CH, C(R) or N, wherein 0, 1, or 2 of Q-Qare N; Q-Qindependently are CH, C(R), or N, wherein 0, 1, or 2 of Q-Qare N; Y is C&#x2550;O or C(H)OH; Rand Rindependently are an electron withdrawing group; n is an integer &#x3e;1; and x and y independently are 0, 1, 2, 3, or 4, where at least one of x and y is not 0.

Fluorenone/fluorenol derivatives for aqueous redox flow batteries

Described herein are systems and methods of hydrogen generation and electrolyte regeneration as independent operations in separate redox flow cells. The operations can be decoupled by using an energy-bearing redox pair that electrochemically bears energy facilitating flexible, efficient hydrogen generation. In one example, the hydrogen generation redox flow cell can include a liquid, energy-bearing electrolyte solution in which at least one species of an energy-bearing redox pair is dissolved, to decouple the hydrogen evolution reaction from the reaction at the opposite electrode (e.g., the oxygen evolution reaction of conventional direct water electrolysis). Each species of the energy-bearing redox pair is associated with a standard electrode potential within the water electrolysis window.

Systems and methods of decoupled hydrogen generation using energy-bearing redox pairs

Described herein are systems and methods of storing and delivering electrical using hydrogen at low-cost and for long-durations. The systems and methods use energy-bearing redox pairs that electrochemically bear energy through decoupled hydrogen and oxygen consumption and/or evolution reactions, which are typically associated with fuel cells. Each species of the energy-bearing redox pair is associated with a standard electrode potential within a water electrolysis voltage window for the electrolyte solution. Electrical energy delivery, hydrogen generation, electrolyte regeneration, or combinations thereof can be performed by logically or physically separated unit operations in a continuous manner, batch manner, or semi-batch manner facilitated by the energy-bearing redox pair.

Systems and methods of long-duration energy storage and regeneration of energy-bearing redox pairs

Electrolyte for batteries with regenerative solid electrolyte interface

Electrolytes for Mg-based energy storage devices can be formed from non-nucleophilic Mgsources to provide outstanding electrochemical performance and improved electrophilic susceptibility compared to electrolytes employing nucleophilic sources. The instant electrolytes are characterized by high oxidation stability (up to 3.4 V vs Mg), improved electrophile compatibility and electrochemical reversibility (up to 100% coulombic efficiency). Synthesis of the Mgelectrolytes utilizes inexpensive and safe magnesium dihalides as non-nucleophilic Mgsources in combination with Lewis acids, MRX(for 3&#x2267;a&#x2267;1). Furthermore, addition of free-halide-anion donors can improve the coulombic efficiency of Mg electrolytes from nucleophilic or non-nucleophilic Mgsources.

Magnesium-based energy storage systems and methods having improved electrolytes

Embodiments of a solid-state electrolyte comprising magnesium borohydride, polyethylene oxide, and optionally a Group IIA or transition metal oxide are disclosed. The solid-state electrolyte may be a thin film comprising a dispersion of magnesium borohydride and magnesium oxide nanoparticles in polyethylene oxide. Rechargeable magnesium batteries including the disclosed solid-state electrolyte may have a coulombic efficiency &#x2267;95% and exhibit cycling stability for at least 50 cycles.

Solid-state rechargeable magnesium battery

Improved lithium-sulfur energy storage systems can utilizes LiSas a component in an electrode of the system. For example, the energy storage system can include a first electrode current collector, a second electrode current collector, and an ion-permeable separator separating the first and second electrode current collectors. A second electrode is arranged between the second electrode current collector and the separator. A first electrode is arranged between the first electrode current collector and the separator and comprises a first condensed-phase fluid comprising LiS. The energy storage system can be arranged such that the first electrode functions as a positive or a negative electrode.

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For a metal anode in a battery, the capacity fade is a significant consideration. In energy storage devices having an anode that includes Mg, the cycling stability can be improved by an electrolyte having a first salt, a second salt, and an organic solvent. Examples of the organic solvent include diglyme, triglyme, tetraglyme, or a combination thereof. The first salt can have a magnesium cation and be substantially soluble in the organic solvent. The second salt can enhance the solubility of the first salt and can have a magnesium cation or a lithium cation. The first salt, the second salt, or both have a BHanion.

Energy storage devices having anodes containing Mg and electrolytes utilized therein

Electrodeposition involving an electrolyte having a surface-smoothing additive can result in self-healing, instead of self-amplification, of initial protuberant tips that give rise to roughness and/or dendrite formation on the substrate and/or film surface. For electrodeposition of a first conductive material (C1) on a substrate from one or more reactants in an electrolyte solution, the electrolyte solution is characterized by a surface-smoothing additive containing cations of a second conductive material (C2), wherein cations of C2 have an effective electrochemical reduction potential in the solution lower than that of the reactants.

Methods and electrolytes for electrodeposition of smooth films

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Richland, WA, United States of America

Yuyan Shao