Structural Insights into How Ions in Basic Solutions Transform
Researchers identified a new intermediate phase that forms during the crystallization of hydrated aluminum-containing salts.
Matthew Paiss, Technical Advisor, Battery Materials & Systems
Electrolyte for high efficiency cycling of sodium metal and rechargeable sodium-based batteries comprising the electrolyte
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 ≧2.5 M or a solvent-sodium salt mole ratio ≦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≧80% within 10-30 charge-discharge cycles and maintain a CE≧80% for at least 100 charge-discharge cycles. In certain embodiments, the battery is an anode-free battery in the as-assembled initial state.
Energy Storage Devices Having Anodes Containing Mg and Electrolytes Utilized Therein
For a metal anode in a battery, the capacity fade is a significant consideration. In energy storage devices having an anode that includes Mg, the cycling stability can be improved by an electrolyte having a first salt, a second salt, and an organic solvent. Examples of the organic solvent include diglyme, triglyme, tetraglyme, or a combination thereof. The first salt can have a magnesium cation and be substantially soluble in the organic solvent. The second salt can enhance the solubility of the first salt and can have a magnesium cation or a lithium cation. The first salt, the second salt, or both have a BH4 anion.
Methods and Energy Storage Devices Utilizing Electrolytes Having Surface-Smoothing Additives
Electrolytes which can effectively enhance the smoothness of deposited films during overcharging process of metal ion batteries are provided. The electrolyte contains a solvent, a metal (M1) salt containing the M1 cations to be intercalated or alloyed into the anion material of the metal ion battery, and an additive metal (M2) salt containing the M2 cations not to be intercalated or alloyed into the anode material. The M2 cations of the additive salt can be preferentially adsorbed, but cannot be deposited on the protruded region of the anode surface, therefore forms a positively charged electrical shield (PAES) which covers the protruded region. During overcharging or other charging processes under extreme conditions, the un-intercalated or un-alloyed M1 cations will be prevented to deposit in the protruded region of the anode by this self-assembled electrical shield (SAES), instead they will be preferentially deposited onto the non-protruded region. This self-smoothing process will effectively improve the smoothness of the deposited M1 film during overcharging of a metal ion battery, thus significantly improve the safety of the metal ion battery.
ELECTROLYTE FOR STABLE CYCLING OF HIGH-ENERGY LITHIUM SULFUR REDOX FLOW BATTERIES
A device comprising: a lithium sulfur redox flow battery comprising an electrolyte composition comprising: (i) a dissolved Li2Sx electroactive salt, wherein x4; (ii) a solvent selected from dimethyl sulfoxide, tetrahydrofuran, or a mixture thereof; and (iii) a supporting salt at a concentration of at least 2 M, as measured by moles of supporting salt divided by the volume of the solvent without considering the volume change of the electrolyte after dissolving the supporting salt.
Tweaking Electrolyte Makes Better Lithium-metal Batteries
New research shows adding a pinch of chemical additive to a lithium-metal battery's electrolyte helps make rechargeable batteries that are stable, charge quickly, and go longer in between charges.
HYDROFLUOROCARBON (HFC)-BASED SAFE ELECTROLYTE FOR SECONDARY BATTERIES (iEdison No. 0685901-22-0118)
The present application relates to the technical field of secondary batteries and, specifically, relates to an electrolyte and lithium-related secondary batteries containing the electrolyte. The electrolyte of the present application comprises a lithium salt, organic solvent A and organic solvent B. The solvent A is hydrofluorocarbon (HFC) compounds and the chemical formula is CxHyFz, where x is from 4 to 10, Z:Y ratio is from 2:1 to 10:1. The solvent B is the common component used in state-of-art electrolyte in lithium-related battery technologies, like carbonates, esters or ethers. The molar ratio of the solvent A in the electrolyte ranges from 8 mol% to 80 mol%. The battery of the present application has high flash point, non-flammable and high capacity retention rate.
PNNL Research Recognized for Innovation in Grid Energy Storage
Materials scientist Dan-Thien Nguyen receives DOE funding to develop flowable zinc battery technology.
From Simulation to Synthesis
Vijay Murugesan highlights how AI can accelerate materials discovery at the Volta Foundation’s Battery Forum.