Electrochemical Properties of an All-Organic Redox Flow Battery Using 2,2,6,6-Tetramethyl-1-Piperidinyloxy and N-Methylphthalimide

Li, Zhen; Li, Sha; Liu, Suqin; Huang, Kelong; Fang, Dong; Wang, Fengchao; Peng, Sui

doi:10.1149/2.012112esl

Cited by 197 publications

(199 citation statements)

References 15 publications

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“…This voltage remains above 0.60 V after increasing the current. At this SOC, a power density of 0.6 mW cm À2 can be achieved, being similar to those reported in literature for organic RFBs operating with non-aqueous electrolytes [12,13,41] (see Table S1). Figure 3 a shows the charge-discharge profile of our battery and the individual voltage profiles of each phase when charged to 35 % of SOC at low current density.…”

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confidence: 87%

A Membrane‐Free Redox Flow Battery with Two Immiscible Redox Electrolytes

et al. 2017

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Flexible and scalable energy storage solutions are necessary for mitigating fluctuations of renewable energy sources. The main advantage of redox flow batteries is their ability to decouple power and energy. However, they present some limitations including poor performance, short‐lifetimes, and expensive ion‐selective membranes as well as high price, toxicity, and scarcity of vanadium compounds. We report a membrane‐free battery that relies on the immiscibility of redox electrolytes and where vanadium is replaced by organic molecules. We show that the biphasic system formed by one acidic solution and one ionic liquid, both containing quinoyl species, behaves as a reversible battery without any membrane. This proof‐of‐concept of a membrane‐free battery has an open circuit voltage of 1.4 V with a high theoretical energy density of 22.5 Wh L−1, and is able to deliver 90 % of its theoretical capacity while showing excellent long‐term performance (coulombic efficiency of 100 % and energy efficiency of 70 %).

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confidence: 87%

A Membrane‐Free Redox Flow Battery with Two Immiscible Redox Electrolytes

et al. 2017

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“…[284] Afirst purely organic RFB has been built following this biomimetic principle. [285] Theredox-active substance used for the cathode was 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and for the anolyte N-methylphthalimide in acetonitrile.N aClO 4 was added as the conducting salt. Figure 12 shows the reaction equations of …”

Section: Redox-active Organic Compoundsmentioning

confidence: 99%

The Chemistry of Redox‐Flow Batteries

et al. 2015

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The development of various redox-flow batteries for the storage of fluctuating renewable energy has intensified in recent years because of their peculiar ability to be scaled separately in terms of energy and power, and therefore potentially to reduce the costs of energy storage. This has resulted in a considerable increase in the number of publications on redox-flow batteries. This was a motivation to present a comprehensive and critical overview of the features of this type of batteries, focusing mainly on the chemistry of electrolytes and introducing a thorough systematic classification to reveal their potential for future development.

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“…182 In aprotic phase, the The first demonstration using TEMPO radical as cathode-active materials for non-aqueous redox flow battery was achieved by Liu and co-workers. 188 The cell was constructed from a TEMPO/ NaClO 4 /acetonitrile catholyte, N-methylphthalimide/NaClO 4 / acetonitrile anolyte, and a Nepem-117 cation-exchange membrane as the separator with Na + as the charge carrier. TEMPO and N-methylphthalimide showed a redox potential around 0.4 V and À1.3 V vs. Ag + /Ag, respectively (Fig.…”

Section: Organic-based Li-redox Flow Batteriesmentioning

confidence: 99%

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

et al. 2015

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Electrical energy storage system such as secondary batteries is the principle power source for portable electronics, electric vehicles and stationary energy storage. As an emerging battery technology, Li-redox flow batteries inherit the advantageous features of modular design of conventional redox flow batteries and high voltage and energy efficiency of Li-ion batteries, showing great promise as efficient electrical energy storage system in transportation, commercial, and residential applications. The chemistry of lithium redox flow batteries with aqueous or non-aqueous electrolyte enables widened electrochemical potential window thus may provide much greater energy density and efficiency than conventional redox flow batteries based on proton chemistry. This Review summarizes the design rationale, fundamentals and characterization of Li-redox flow batteries from a chemistry and material perspective, with particular emphasis on the new chemistries and materials. The latest advances and associated challenges/ opportunities are comprehensively discussed.

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Electrochemical Properties of an All-Organic Redox Flow Battery Using 2,2,6,6-Tetramethyl-1-Piperidinyloxy and N-Methylphthalimide

Cited by 197 publications

References 15 publications

A Membrane‐Free Redox Flow Battery with Two Immiscible Redox Electrolytes

A Membrane‐Free Redox Flow Battery with Two Immiscible Redox Electrolytes

The Chemistry of Redox‐Flow Batteries

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

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