High-rate lithium ion energy storage to facilitate increased penetration of photovoltaic systems in electricity grids

Lennon, Alison; Jiang, Yu; Hall, Charles A. S.; Lau, Derwin; Song, Ning; Burr, Patrick A.; Grey, Clare P.; Griffith, Kent J.

doi:10.1557/mre.2019.4

Cited by 12 publications

(7 citation statements)

References 185 publications

(294 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the first discovery of graphite and lithium cobalt dioxide as stable intercalation electrodes for lithium ions, rechargeable lithium-ion batteries (LIBs) have been commercialized for over 30 years. , So far, state-of-the-art commercial LIBs are still using intercalation-type electrodes due to their small volume change upon lithium (de)insertion and long lifespan (>1000 cycles) compared with alloy-based and conversion-based electrodes . Despite the maturity of intercalation-type electrodes, the relatively sluggish lithium ion diffusion kinetics in graphite, for instance, largely limits the cell power density (100–300 W kg –1 per cell). − The exploration of electrode materials with both high specific capacity and fast lithium intercalation/deintercalation capability will play an important role in the application scenarios where fast charging is needed.…”

Section: Introductionmentioning

confidence: 99%

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

et al. 2021

View full text Add to dashboard Cite

Niobium-based transitional metal oxides are emerging as promising fast-charging electrodes for lithium-ion batteries. Although various niobium-based double oxides have been investigated (Ti–Nb–O, V–Nb–O, W–Nb–O, Cr–Nb–O, etc.), their underlying structure–property relationships are still poorly understood, which hinders the structural optimization for Nb-based electrodes. In this work, niobium tungsten oxides (WNb2O8, W3Nb14O44, and W10.3Nb6.7O47) featured with different structural openings are selected as model systems to investigate the role of crystal structures in their lithium ion storage behaviors. The three crystal structures showed different voltage windows to maintain the stable and high-rate lithium ion (de)intercalation. In detail, WNb2O8 exhibits a wide stability window (cutoff voltage below 0.5 V vs Li/Li+), benefiting from its evenly distributed quadrilateral tunnels. In contrast, W3Nb14O44 and W10.3Nb6.7O47, with larger structural openings, required higher cutoff voltages (1.0 and 1.3 V vs Li/Li+, respectively) to maintain their structural stabilities during lithium (de)insertion. The best rate performance is found in W10.3Nb6.7O47 crystals, benefiting from its large pentagonal tunnels that offered a low lithium intercalation barrier and possible two-dimensional lithium ion pathways. Despite a medium-sized tunnel opening, the Wadsley–Roth structure of W3Nb14O44 shows the highest lithium storage capability and specific capacity due to its abundant lithium intercalation sites. We expect that our systematic investigation of the three representative structures could offer more inspiration for the future structural optimization of Nb-based electrodes toward different energy storage systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Next-generation electrochemical energy storage systems with high-rate capability are of great interest for electric vehicles and renewable energy systems. , Lithium-ion batteries (LIBs) are promising candidates; however, the use of high charging rates (C-rates larger than 1 C) with the commonly used graphite anodes can lead to increased battery impedance and introduce safety concerns due to the formation of Li dendrites. , Graphite has a low lithiation potential (∼0.1 V vs Li + |Li), and consequently, large overpotentials induced at high current densities can result in plating of Li on the anode surface. , Furthermore, if the overpotential is non-uniform across the surface, then, Li dendritic structures can grow and subsequently lead to a battery short circuiting and, in worst cases, cause fires. A strategy for high-rate LIBs is to use anode materials with a higher lithiation potential.…”

Section: Introductionmentioning

confidence: 99%

Atomistic Insights into Lithium Storage Mechanisms in Anatase, Rutile, and Amorphous TiO₂ Electrodes

Yuwono

Burr

Galvin

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Density functional theory calculations were used to investigate the phase transformations of Li x TiO 2 (at 0 ≤ x ≤ 1), solidstate Li + diffusion, and interfacial charge-transfer reactions in both crystalline and amorphous forms of TiO 2 . It is shown that in contrast to crystalline TiO 2 polymorphs, the energy barrier to Li + diffusion in amorphous TiO 2 decreases with increasing mole fraction of Li + due to the changes of chemical species pair interactions following the progressive filling of low-energy Li + trapping sites. Sites with longer Li−Ti and Li−O interactions exhibit lower Li + insertion energies and higher migration energy barriers. Due to its disordered atomic arrangement and increasing Li + diffusivity at higher mole fractions, amorphous TiO 2 exhibits both surface and bulk storage mechanisms. The results suggest that nanostructuring of crystalline TiO 2 can increase both the rate and capacity because the capacity dependence on the bulk storage mechanism is minimized and replaced with the surface storage mechanism. These insights into Li + storage mechanisms in different forms of TiO 2 can guide the fabrication of TiO 2 electrodes to maximize the capacity and rate performance in the future.

show abstract

“…Li-ion batteries with short charge times and high power density are required to accelerate consumer adoption of electric vehicles and relieve intermittency of renewable energy resources. , While there are many factors determining the charge/discharge rate of a device, and not all materials with high-rate capability are suited for each application, the ionic and electronic conduction within the active materials represent fundamental limits to the achievable rate. Lithium diffusion in electrode materials, quantified by a diffusion coefficient D , is usually much slower than in the electrolyte (liquid or solid).…”

Section: Introductionmentioning

confidence: 99%

Lithium Diffusion in Niobium Tungsten Oxide Shear Structures

et al. 2020

Self Cite

View full text Add to dashboard Cite

Niobium tungsten oxides with crystallographic shear structures form a promising class of high-rate Li-ion anode materials. Lithium diffusion within these materials is studied in this work using density functional theory calculations, specifically nudged elastic band calculations and ab initio molecular dynamics simulations. Lithium diffusion is found to occur through jumps between 4-fold coordinated window sites with low activation barriers (80−300 meV) and is constrained to be effectively one-dimensional by the crystallographic shear planes of the structures. We identify a number of other processes, including rattling motions with barriers on the order of the thermal energy at room temperature, and intermediate barrier hops between 4fold and 5-fold coordinated lithium sites. We demonstrate differences regarding diffusion pathways between different cavity types; within the ReO 3 -like block units of the structures, cavities at the corners and edges host more isolated diffusion tunnels than those in the interior. Diffusion coefficients are found to be in the range of 10 −12 to 10 −11 m 2 s −1 for lithium concentrations of 0.5 Li/TM. Overall, the results provide a complete picture of the diffusion mechanism in niobium tungsten oxide shear structures, and the structure−property relationships identified in this work can be generalized to the entire family of crystallographic shear phases.

show abstract

High-rate lithium ion energy storage to facilitate increased penetration of photovoltaic systems in electricity grids

Abstract: ABSTRACT

Cited by 12 publications

References 185 publications

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

Atomistic Insights into Lithium Storage Mechanisms in Anatase, Rutile, and Amorphous TiO₂ Electrodes

Lithium Diffusion in Niobium Tungsten Oxide Shear Structures

Contact Info

Product

Resources

About

High-rate lithium ion energy storage to facilitate increased penetration of photovoltaic systems in electricity grids

Abstract: ABSTRACT

Cited by 12 publications

References 185 publications

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

Structural Insights into the Lithium Ion Storage Behaviors of Niobium Tungsten Double Oxides

Atomistic Insights into Lithium Storage Mechanisms in Anatase, Rutile, and Amorphous TiO2 Electrodes

Lithium Diffusion in Niobium Tungsten Oxide Shear Structures

Contact Info

Product

Resources

About

Atomistic Insights into Lithium Storage Mechanisms in Anatase, Rutile, and Amorphous TiO₂ Electrodes