Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Next generation molten NaI batteries for grid scale energy storage

Journal Article · · Journal of Power Sources

Robust, safe, and reliable grid-scale energy storage continues to be a priority for improved energy surety, expanded integration of renewable energy, and greater system agility required to meet modern dynamic and evolving electrical energy demands. We describe here a new sodium-based battery based on a molten sodium anode, a sodium iodide/aluminum chloride (NaI/AlCl3) cathode, and a high conductivity NaSICON (Na1+xZr2SixP3–xO12) ceramic separator. This NaI battery operates at intermediate temperatures (120–180 °C) and boasts an energy density of >150 Wh kg–1. The energy-dense NaI-AlCl3 ionic liquid catholyte avoids lifetime-limiting plating and intercalation reactions, and the use of earth-abundant elements minimizes materials costs and eliminates economic uncertainties associated with lithium metal. Moreover, the inherent safety of this system under internal mechanical failure is characterized by negligible heat or gas production and benign reaction products (Al, NaCl). Scalability in design is exemplified through evolution from 0.85 to 10 Ah (28 Wh) form factors, displaying lifetime average Coulombic efficiencies of 99.45% and energy efficiencies of 81.96% over dynamic testing lasting >3000 h. Here, this demonstration promises a safe, cost-effective, and long-lifetime technology as an attractive candidate for grid scale storage.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Electricity Delivery and Energy Reliability (OE)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1465804
Alternate ID(s):
OSTI ID: 1550403
Report Number(s):
SAND--2017-7034J; 663094
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Journal Issue: C Vol. 360; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (30)

A High-Energy Room-Temperature Sodium-Sulfur Battery journal December 2013
Ionic Liquid Redox Catholyte for High Energy Efficiency, Low-Cost Energy Storage journal April 2015
Sodium-Metal Halide and Sodium-Air Batteries journal June 2014
Improving the ionic conductivity of NASICON through aliovalent cation substitution of Na3Zr2Si2PO12 journal July 2015
The sodium/nickel chloride (ZEBRA) battery journal November 2001
A review of specific conductivities of potassium hydroxide solutions for various concentrations and temperatures journal March 2007
Low temperature performance of sodium–nickel chloride batteries with NaSICON solid electrolyte journal December 2015
Safety mechanisms in lithium-ion batteries journal April 2006
Advanced materials for sodium-beta alumina batteries: Status, challenges and perspectives journal May 2010
A review on prognostics and health monitoring of Li-ion battery journal August 2011
Thermal runaway caused fire and explosion of lithium ion battery journal June 2012
The effects of temperature on the electrochemical performance of sodium–nickel chloride batteries journal October 2012
P2-type Na 2/3 Mn 1-x Al x O 2 cathode material for sodium-ion batteries: Al-doped enhanced electrochemical properties and studies on the electrode kinetics journal July 2017
Nanoeffects promote the electrochemical properties of organic Na2C8H4O4 as anode material for sodium-ion batteries journal April 2015
An Ambient Temperature Molten Sodium–Vanadium Battery with Aqueous Flowing Catholyte journal January 2016
Electrochemical Energy Storage for Green Grid journal May 2011
High-performance rechargeable lithium-iodine batteries using triiodide/iodide redox couples in an aqueous cathode journal May 2013
Liquid-metal electrode to enable ultra-low temperature sodium–beta alumina batteries for renewable energy storage journal August 2014
Electrochemical energy storage in a sustainable modern society journal January 2014
A redox flow lithium battery based on the redox targeting reactions between LiFePO 4 and iodide journal January 2016
Challenges in the development of advanced Li-ion batteries: a review journal January 2011
High temperature sodium batteries: status, challenges and future trends journal January 2013
The Influences of Excess Sodium on Low-Temperature NaSICON Synthesis journal August 2014
Structural Investigation of Monoclinic‐Rhombohedral Phase Transition in Na 3 Zr 2 Si 2 PO 12 and Doped NASICON journal June 2015
Environmentally-friendly aqueous Li (or Na)-ion battery with fast electrode kinetics and super-long life journal January 2016
Electrical Energy Storage for the Grid: A Battery of Choices journal November 2011
The Secondary Alkaline Zinc Electrode journal January 1991
Studies on the Thermal Breakdown of Common Li-Ion Battery Electrolyte Components journal January 2015
Preparation and Processing Temperature Effects on Ion Conductivity in Solution Derived Sodium Zirconium Phosphate (NaZr 2 P 3 O 12 ) Thin Films journal December 2013
A Sodium-Sulfur Secondary Battery conference February 1967

Cited By (3)

Zirconium‐Based Materials for Electrochemical Energy Storage journal February 2019
Enhanced alkaline stability in a hafnium-substituted NaSICON ion conductor journal January 2018
Electrochemistry of the NaI-AlCl 3 Molten Salt System for Use as Catholyte in Sodium Metal Batteries journal January 2018

Similar Records

A High-Performance Na-Al Battery Based on Reversible NaAlCl4 Catholyte
Journal Article · Tue Oct 27 00:00:00 EDT 2020 · Advanced Energy Materials · OSTI ID:1687384

A High‐Performance Na–Al Battery Based on Reversible NaAlCl 4 Catholyte
Journal Article · Wed Sep 02 00:00:00 EDT 2020 · Advanced Energy Materials · OSTI ID:1804536