Energy efficient Na-aqueous-catholyte redox flow battery

S. T. Senthilkumar; Jinhyup Han; Jeongsun Park; Soo Min Hwang; Donghoon Jeon; Youngsik Kim

doi:10.1016/j.ensm.2017.10.006

Energy efficient Na-aqueous-catholyte redox flow battery

S. T. Senthilkumar, Jinhyup Han, Jeongsun Park, Soo Min Hwang, Donghoon Jeon, Youngsik Kim

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Redox flow battery (RFB) technologies have become play a significant role in the future for the storage of electrical energy produced from intermitted renewable energies such as solar, wind, and hydroelectric powers. Although the development of high-energy density RFB remains a challenging. Herein, we report the Na-aqueous-catholyte RFB (NaAqRFB) towards high-density electrical energy storage. Na-metal anode offers a high energy density and the use of an aqueous flowing catholyte decouples the energy and power. NASICON (Na₃Zr₂Si₂PO₁₂) is employed as a solid electrolyte in the NaAqRFB to separate the Na anode and a flowable aqueous catholyte. The constructed prototype NaAqRFB operates using a sodium-hexacyanoferrate solution as the aqueous catholyte with no added supporting salt/electrolyte, and yielded an average cell potential of ∼ 3.06 V (vs. Na/Na⁺), and an energy density of 54.16 Wh L⁻¹ (based on the volume of catholyte) with high energy efficiency (∼ 92%, over 50 cycles), outperforming conventional RFB. The present work offers a new route for developing high-energy-density redox flow batteries.

Original language	English
Pages (from-to)	324-330
Number of pages	7
Journal	Energy Storage Materials
Volume	12
DOIs	https://doi.org/10.1016/j.ensm.2017.10.006
State	Published - May 2018

Keywords

Capacity
Energy density
Energy efficiency
Flow battery
Sodium hexacyanoferrate

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ensm.2017.10.006

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title = "Energy efficient Na-aqueous-catholyte redox flow battery",

abstract = "Redox flow battery (RFB) technologies have become play a significant role in the future for the storage of electrical energy produced from intermitted renewable energies such as solar, wind, and hydroelectric powers. Although the development of high-energy density RFB remains a challenging. Herein, we report the Na-aqueous-catholyte RFB (NaAqRFB) towards high-density electrical energy storage. Na-metal anode offers a high energy density and the use of an aqueous flowing catholyte decouples the energy and power. NASICON (Na3Zr2Si2PO12) is employed as a solid electrolyte in the NaAqRFB to separate the Na anode and a flowable aqueous catholyte. The constructed prototype NaAqRFB operates using a sodium-hexacyanoferrate solution as the aqueous catholyte with no added supporting salt/electrolyte, and yielded an average cell potential of ∼ 3.06 V (vs. Na/Na+), and an energy density of 54.16 Wh L−1 (based on the volume of catholyte) with high energy efficiency (∼ 92\%, over 50 cycles), outperforming conventional RFB. The present work offers a new route for developing high-energy-density redox flow batteries.",

keywords = "Capacity, Energy density, Energy efficiency, Flow battery, Sodium hexacyanoferrate",

author = "Senthilkumar, \{S. T.\} and Jinhyup Han and Jeongsun Park and \{Min Hwang\}, Soo and Donghoon Jeon and Youngsik Kim",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = may,

doi = "10.1016/j.ensm.2017.10.006",

language = "English",

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pages = "324--330",

journal = "Energy Storage Materials",

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TY - JOUR

T1 - Energy efficient Na-aqueous-catholyte redox flow battery

AU - Senthilkumar, S. T.

AU - Han, Jinhyup

AU - Park, Jeongsun

AU - Min Hwang, Soo

AU - Jeon, Donghoon

AU - Kim, Youngsik

PY - 2018/5

Y1 - 2018/5

N2 - Redox flow battery (RFB) technologies have become play a significant role in the future for the storage of electrical energy produced from intermitted renewable energies such as solar, wind, and hydroelectric powers. Although the development of high-energy density RFB remains a challenging. Herein, we report the Na-aqueous-catholyte RFB (NaAqRFB) towards high-density electrical energy storage. Na-metal anode offers a high energy density and the use of an aqueous flowing catholyte decouples the energy and power. NASICON (Na3Zr2Si2PO12) is employed as a solid electrolyte in the NaAqRFB to separate the Na anode and a flowable aqueous catholyte. The constructed prototype NaAqRFB operates using a sodium-hexacyanoferrate solution as the aqueous catholyte with no added supporting salt/electrolyte, and yielded an average cell potential of ∼ 3.06 V (vs. Na/Na+), and an energy density of 54.16 Wh L−1 (based on the volume of catholyte) with high energy efficiency (∼ 92%, over 50 cycles), outperforming conventional RFB. The present work offers a new route for developing high-energy-density redox flow batteries.

AB - Redox flow battery (RFB) technologies have become play a significant role in the future for the storage of electrical energy produced from intermitted renewable energies such as solar, wind, and hydroelectric powers. Although the development of high-energy density RFB remains a challenging. Herein, we report the Na-aqueous-catholyte RFB (NaAqRFB) towards high-density electrical energy storage. Na-metal anode offers a high energy density and the use of an aqueous flowing catholyte decouples the energy and power. NASICON (Na3Zr2Si2PO12) is employed as a solid electrolyte in the NaAqRFB to separate the Na anode and a flowable aqueous catholyte. The constructed prototype NaAqRFB operates using a sodium-hexacyanoferrate solution as the aqueous catholyte with no added supporting salt/electrolyte, and yielded an average cell potential of ∼ 3.06 V (vs. Na/Na+), and an energy density of 54.16 Wh L−1 (based on the volume of catholyte) with high energy efficiency (∼ 92%, over 50 cycles), outperforming conventional RFB. The present work offers a new route for developing high-energy-density redox flow batteries.

KW - Capacity

KW - Energy density

KW - Energy efficiency

KW - Flow battery

KW - Sodium hexacyanoferrate

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U2 - 10.1016/j.ensm.2017.10.006

DO - 10.1016/j.ensm.2017.10.006

M3 - Article

AN - SCOPUS:85032901692

SN - 2405-8297

VL - 12

SP - 324

EP - 330

JO - Energy Storage Materials

JF - Energy Storage Materials

ER -

Energy efficient Na-aqueous-catholyte redox flow battery

Abstract

Keywords

UN SDGs

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