Battelle Memorial Institute

Other

Princeton University

Zimin Nie

Wei Wang

Jun Liu

Zhenguo Yang

Vincent L Sprenkle

Bin Li

Liyu Li

Xiaoliang Wei

Guanguang Xia

Daiwon Choi

Soowhan Kim

Baowei Chen

Jianlu Zhang

Donghai Wang

Rong Kou

Ilhan A Aksay

Vilayanur Venkataraman Viswanathan

Yuliang Cao

Huilin Pan

Aaron M Hollas

Lifen Xiao

Gordon Lee Graff

Jie Xiao

Wu Xu

Jun Lu

Z Daniel Deng

Jin Yong Kim

Jamelyn D Holladay

Yuyan Shao

David Matthew Reed

Gregory J Exarhos

Edwin C Thomsen

Tianbiao Liu

Alasdair James Crawford

Yang Yang

Ruozhu Feng

Kurtis P Recknagle

Litao Yan

Qingtao Luo

Jason Zhang

Xin Zhang

Xiaoqin Zang

Vijay Murugesan

Nadeesha P Nambukara Wellala

Brian J Koeppel

Birgit Schwenzer

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

All-vanadium sulfate redox flow battery systems have a catholyte and an anolyte comprising an aqueous supporting solution including chloride ions and phosphate ions. The aqueous supporting solution stabilizes and increases the solubility of vanadium species in the electrolyte, allowing an increased vanadium concentration over a desired operating temperature range. According to one example, the chloride ions are provided by MgCl, and the phosphate ions are provided by (NH)HPO.

All-vanadium sulfate acid redox flow battery system

This document describes techniques and systems for in operando, non-invasive SOC monitoring of redox flow batteries. The described techniques and systems allow for accurate, inexpensive, portable, and real-time methods to measure the SOC of redox flow batteries. System operators can monitor the SOC by measuring an acoustic attenuation coefficient of the electrolyte in the redox flow battery. The acoustic attenuation coefficient is measured using an ultrasonic transducer attached to a probing cell, which is connected to an electrolyte flow of a redox flow battery. The acoustic attenuation coefficient provides an accurate, real-time SOC measurement that is generally insensitive to varying operational temperatures of the electrolyte solution.

In operando, non-invasive state-of-charge monitoring for redox flow batteries

Flow cell systems are provided. Example flow cell systems can include an H/Hhalf-cell and a counterpart Fe/Feor V/Vhalf-cell. Flow cell systems can also include a half-cell in fluid communication with an electrolyte regeneration chamber. Embodiments of these flow cells systems can be configured to produce hydrogen through electrolysis. Flow cell battery systems are also disclosed. Example flow cell battery systems can include an H/Hanalyte; and a counterpart Fe/Feor V/Vcatholyte. Processes for generating hydrogen are also disclosed. Example processes can include generating protons from a Fe/Feor V/Velectrolyte solution; and reacting the protons with HO to form H.

Flow cell systems, flow cell batteries, and hydrogen production processes

Disclosed are cathodes having electron-conductive high-surface-area materials, aqueous non-halide-containing electrolytes, secondary zinc-iodine energy storage devices using the same, and methods for assembling the same. The disclosed high-surface-area materials and the aqueous non-halide-containing electrolyte solutions can contribute together to the confinement of the active iodine species in the cathode and to the minimization of shuttle effects and self-discharging. The non-halide-containing electrolyte salts can facilitate preferential adsorption of the iodine species to the cathode material rather than dissolution in the aqueous electrolyte solution, thereby contributing to the confinement of the active iodine species.

Zinc-iodine secondary energy storage methods, devices, and electrolytes

Embodiments of an aqueous electrolyte comprising a base and a phenazine derivative are disclosed. Redox flow batteries including the aqueous electrolyte are also disclosed. The phenazine derivative has a chemical structure according to formula I: 

Highly stable phenazine derivatives for aqueous redox flow batteries

A redox flow battery stack cell frame comprising a support frame and a monolithic bipolar plate integrated within the support frame is disclosed. The bipolar plate comprises a plurality of interdigitated flow channels on at least one surface. The support frame comprises an inlet manifold formed into a facing surface of the first side of the frame, the inlet manifold comprising fluid inlet distribution channels in a serpentine arrangement, each fluid inlet distribution channel aligned with a single inlet flow channel of the bipolar plate; and an outlet manifold formed into the facing surface of the opposing side of the frame, the outlet manifold comprising fluid outlet distribution channels in a serpentine arrangement, each fluid outlet distribution channel aligned with a single outlet flow channel of the bipolar plate. Redox flow battery stack cells and stacks comprising the stack cell frame are also disclosed.

High performance redox flow battery stack

Introducing multiple redox reactions with a suitable voltage range can improve the energy density of redox flow battery (RFB) systems. One example includes RFB systems utilizing multiple redox pairs in the positive half cell, the negative half cell, or in both. Such RFB systems can have a negative electrolyte, a positive electrolyte, and a membrane between the negative electrolyte and the positive electrolyte, in which at least two electrochemically active elements exist in the negative electrolyte, the positive electrolyte, or both.

Redox flow batteries having multiple electroactive elements

Composite materials containing sulfurized polymers and sulfur-containing particles can be used in lithium-sulfur energy storage devices as a positive electrode. The composite material exhibits relatively high capacity retention and high charge/discharge cycle stability. In one particular instance, the composite comprises a sulfurized polymer having chains that are cross-linked through sulfur bonds. The polymer provides a matrix in which sulfide and/or polysulfide intermediates formed during electrochemical charge-discharge processes of sulfur can be confined through chemical bonds and not mere physical confinement or sorption.

Polymer-sulfur composite materials for electrodes in Li-S energy storage devices

Redox flow battery systems having a supporting solution that contains Clions can exhibit improved performance and characteristics. Furthermore, a supporting solution having mixed SOand Clions can provide increased energy density and improved stability and solubility of one or more of the ionic species in the catholyte and/or anolyte. According to one example, a vanadium-based redox flow battery system is characterized by an anolyte having Vand Vin a supporting solution and a catholyte having Vand Vin a supporting solution. The supporting solution can contain Clions or a mixture of SOand Clions.

Redox flow batteries based on supporting solutions containing chloride

An aqueous redox flow battery system includes an aqueous catholyte and an aqueous anolyte. The aqueous catholyte may comprise (i) an optionally substituted thiourea or a nitroxyl radical compound and (ii) a catholyte aqueous supporting solution. The aqueous anolyte may comprise (i) metal cations or a viologen compound and (ii) an anolyte aqueous supporting solution. The catholyte aqueous supporting solution and the anolyte aqueous supporting solution independently may comprise (i) a proton source, (ii) a halide source, or (iii) a proton source and a halide source.

Aqueous electrolytes for redox flow battery systems

Improved metal-based redox flow batteries (RFBs) can utilize a metal and a divalent cation of the metal (M) as an active redox couple for a first electrode and electrolyte, respectively, in a first half-cell. For example, the metal can be Zn. The RFBs can also utilize a second electrolyte having I, anions of I(for x&#x2267;3), or both in an aqueous solution, wherein the Iand the anions of I(for x&#x2267;3) compose an active redox couple in a second half-cell.

High-energy-density, aqueous, metal-polyiodide redox flow batteries

Composite separators having a porous structure and including acid-stable, hydrophilic, inorganic particles enmeshed in a substantially fully fluorinated polyolefin matrix can be utilized in a number of applications. The inorganic particles can provide hydrophilic characteristics. The pores of the separator result in good selectivity and electrical conductivity. The fluorinated polymeric backbone can result in high chemical stability. Accordingly, one application of the composite separators is in redox flow batteries as low cost membranes. In such applications, the composite separator can also enable additional property-enhancing features compared to ion-exchange membranes. For example, simple capacity control can be achieved through hydraulic pressure by balancing the volumes of electrolyte on each side of the separator. While a porous separator can also allow for volume and pressure regulation, in RFBs that utilize corrosive and/or oxidizing compounds, the composite separators described herein are preferable for their robustness in the presence of such compounds.

Composite separators and redox flow batteries based on porous separators

Growing community of inventors

Richland, WA, United States of America

Zimin Nie