7 research outputs found
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Enhancing the Performance of Viscous Electrode-Based Flow Batteries Using Lubricant-Impregnated Surfaces
Redox
flow batteries are a promising technology that can potentially
meet the large-scale grid storage needs of renewable power sources.
Today, most redox flow batteries are based on aqueous solutions with
low cell voltages and low energy densities that lead to significant
costs from hardware and balance-of-plant. Nonaqueous electrochemical
couples offer higher cell voltages and higher energy densities and
can reduce system-level costs but tend toward higher viscosities and
can exhibit non-Newtonian rheology that increases the power required
to drive flow. This work uses lubricant-impregnated surfaces (LIS)
to promote flow in electrochemical systems and outlines their design
based on interfacial thermodynamics and electrochemical stability.
We demonstrate up to 86% mechanical power savings at low flow rates
for LIS compared to conventional surfaces for a lithium polysulfide
flow electrode in a half-cell flow battery configuration. The measured
specific charge capacity of ∼800 mAh/(g·S) is a 4-fold
increase over previous work
Polysulfide Flow Batteries Enabled by Percolating Nanoscale Conductor Networks
A new approach to flow battery design
is demonstrated wherein diffusion-limited
aggregation of nanoscale conductor particles at ∼1 vol % concentration
is used to impart mixed electronic-ionic conductivity to redox solutions,
forming flow electrodes with embedded current collector networks that
self-heal after shear. Lithium polysulfide flow cathodes of this architecture
exhibit electrochemical activity that is distributed throughout the
volume of flow electrodes rather than being confined to surfaces of
stationary current collectors. The nanoscale network architecture
enables cycling of polysulfide solutions deep into precipitation regimes
that historically have shown poor capacity utilization and reversibility
and may thereby enable new flow battery designs of higher energy density
and lower system cost. Lithium polysulfide half-flow cells operating
in both continuous and intermittent flow mode are demonstrated for
the first time