Title: Electrolyte for high efficiency cycling of sodium metal and rechargeable sodium-based batteries comprising the electrolyte

Abstract

Embodiments of a non-aqueous electrolyte for a rechargeable sodium (Na)-based battery comprise a sodium salt and a nonaqueous solvent, the electrolyte having a sodium salt concentration .gtoreq.2.5 M or a solvent-sodium salt mole ratio .ltoreq.4:1. Na-based rechargeable batteries including the electrolyte exhibit both high cycling stability and high coulombic efficiency (CE). Some embodiments of the disclosed batteries attain a CE.gtoreq.80% within 10-30 charge-discharge cycles and maintain a CE.gtoreq.80% for at least 100 charge-discharge cycles. In certain embodiments, the battery is an anode-free battery in the as-assembled initial state.

Inventors:

Zhang, Ji-Guang; Cao, Ruiguo; Henderson, Wesley A.; Mishra, Kuber; Xu, Wu

Issue Date:

2019-01-01

Research Org.:

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1493293

Patent Number(s):

10170795

Application Number:

14/869,647

Assignee:

Battelle Memorial Institute (Richland, WA)

Patent Classifications (CPCs):

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M10/054 - Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
H01M10/0568 - characterised by the solutes
H01M10/0569 - characterised by the solvents
H01M2300/0025 - Organic electrolyte
H01M2300/0028 - characterised by the solvent
H01M2300/0037 - Mixture of solvents
H01M4/381 - {Alkaline or alkaline earth metals elements
H01M4/5815 - {Sulfides}
H01M4/661 - {Metal or alloys, e.g. alloy coatings
H01M4/663 - {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/10 - Energy storage

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DOE Contract Number:  

AC05-76RL01830

Resource Type:

Patent

Resource Relation:

Patent File Date: 2015 Sep 29

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE