Battelle Memorial Institute

Wei Wang

Zimin Nie

Vincent L Sprenkle

Zhenguo Yang

Jun Liu

Liyu Li

Bin Li

Xiaoliang Wei

Guanguang Xia

Soowhan Kim

Jianlu Zhang

Baowei Chen

Yuyan Shao

Jie Xiao

Wu Xu

Dongping Lu

Qian Huang

Ruozhu Feng

Aaron M Hollas

Litao Yan

Gordon Lee Graff

Jun Lu

Jamelyn D Holladay

Jiguang Zhang

Daiwon Choi

David Matthew Reed

Edwin C Thomsen

Jianming Zheng

Vilayanur Venkataraman Viswanathan

Yuliang Cao

Tianbiao Liu

Huilin Pan

Alasdair James Crawford

Zhiqun Deng

Yang Yang

Yangang Liang

Kurtis P Recknagle

Lifen Xiao

Qingtao Luo

Xin Zhang

Vijay Murugesan

Nadeesha P Nambukara Wellala

Xiaoqin Zang

Jing Wu

Heather M Job

Will Dean

Brian J Koeppel

Jie Bao

Juran Noh

Disclosed herein is an electrochemical characterization apparatus and system that facilitates high-throughput measurements of various different properties and/or performance characteristics of components of an energy storage and conversion device, such as an electrolyte and/or electrodes. Also disclosed are methods for using the electrochemical characterization apparatus and system.

High-throughput electrochemical characterization apparatus and system and methods for using the same

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

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

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

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

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.

[object Object]

Growing community of inventors

Kennewick, WA, United States of America

Wei Wang