High Coulombic Efficiency of Lithium Plating/Stripping and Lithium Dendrite Prevention

Zhang, Ji‐Guang; Xu, Wu; Henderson, Wesley A.

doi:10.1007/978-3-319-44054-5_3

Cited by 3 publications

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“…16,19,30−35 Such short-term methods could generate artificially high efficiency values at early stages. 36,37 Alternatively, longer measurements of Li consumption account for periods of accelerated rates of Li loss, so the average rate is reflective of the actual behavior and thereby a more reliable predictor of full cells cycled under same conditions.…”

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“…Rates of Li loss could change at different stages of anode health, owing to changes in Li morphology upon repeated fast-charge cycling. This method contrasts more conventional determinations of Coulombic efficiency, which strip and plate Li from a reservoir 20 times or fewer before concluding the test. ,,− Such short-term methods could generate artificially high efficiency values at early stages. , Alternatively, longer measurements of Li consumption account for periods of accelerated rates of Li loss, so the average rate is reflective of the actual behavior and thereby a more reliable predictor of full cells cycled under same conditions.…”

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Locally Superconcentrated Electrolytes for Ultra-Fast-Charging Lithium Metal Batteries with High-Voltage Cathodes

et al. 2022

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Electric vehicles capable of recharging in the same time it takes to refuel a gasoline-powered car require electrolytes that maximize areal ion flux to enable electrochemical reactions to proceed at the same rate that current is passed through the external circuit. While strategies for increasing ionic charge carrier concentration in electrolytes are well-established, enhancements are made at the expense of carrier mobility, placing a ceiling on areal ion flux below the requirement for fast-charge. Here, we explore locally superconcentrated electrolytes, which employ a noncoordinating diluent to reduce viscosity, for delivering an 80% change in state-of-charge in Li|NMC622 batteries in 5–15 min. We investigate the effects of concentration, viscosity, ionic conductivity, and solvation on lowering fast-charge overpotentials and extending cycle life. We identify divergent failure mechanisms that occur on different time scales when cycling the cells at different charge rates and depths of discharge, which has implications for future electrolyte designs.

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Locally Superconcentrated Electrolytes for Ultra-Fast-Charging Lithium Metal Batteries with High-Voltage Cathodes

et al. 2022

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Rechargeable Magnesium Batteries using Conversion‐Type Cathodes: A Perspective and Minireview

et al. 2018

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would impose restrictions on the penetration of LIBs into these large-volume markets. [3,4] In addition, after 25 years of continuous improvements, the mature LIBs technology is approaching a fundamental limit in terms of energy density (slightly above 300 W h kg −1 ) and costs at the materials level. [4][5][6] With the aforementioned concerns, alternative battery concepts have significantly stimulated research interests to further drive battery technologies to increase both the gravimetric and volumetric energy densities, reduce the cost, and expand the cycling life. [3,6,7] The "beyond Li-ion" technologies such as lithium-air, lithium-sulfur (Li-S), multivalent batteries, and solid-state batteries show the unique feature of using metal anodes that can store more energy via a reversible metal plating/stripping process. Unfortunately, these emerging or reviving technologies involving lithium metal inevitably meet the critical challenges of resource shortage. Furthermore, the high reactivity of lithium metal leads to electrolyte consumption and nonuniform lithium distribution (even dendritic growth) during cycling. These issues still hamper the mainstream commercialization of the lithium-metal-based batteries. [8,9] Rechargeable magnesium (Mg) batteries may offer considerable advantages (see Table 1) over Li-metal batteries because the metallic Mg anode shows double the volumetric capacity, safer and easier processing features, more uniform and nondendritic electroplating during cell charging, and cheaper costs due to its greater abundance in the earth crust. [4,[10][11][12][13] Based on these advantages, intensive attention has been garnered toward the development of new electrolytes, cathodes, and their corresponding mechanistic understandings for the rechargeable Mg batteries. Additionally, several industries including Pellion Technologies (a spin-off company from Massachusetts Institute of Technology), the Toyota Research Institute of North America, and recently Sony Corporation have initiated R&D projects for the rechargeable Mg batteries and tried to find practical application pathways. Nonetheless, developing a high-energy-density Mg battery with long cycle life and high rate capability is still a huge challenge due to the lack of high-performance cathodes and suitable Mg-ion electrolytes. [9,12] It is fair to state that the Chevrel phases, reported by Aurbach et al. in 2000, are still the most attractive Mg-ion Rechargeable magnesium (Mg) batteries are one of the potential contenders to replace current Li-ion batteries to power future electric vehicles with lower cost, higher safety, and extended mileage. To achieve this goal, both high-voltage intercalation-type cathodes and high-capacity conversion-type cathodes are considered. However, there are still no reports to compare rechargeable Mg batteries with the state-of-the art Li-ion batteries in terms of their overall performance. Also, potential cathode materials to deliver higher energy density in rechargeable Mg batteries are rarely summarized. Here, t...

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Methods and Techniques of Solid-State Batteries

Sradhasagar

Pati

Roy

2022

ACS Symposium Series

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High Coulombic Efficiency of Lithium Plating/Stripping and Lithium Dendrite Prevention

Cited by 3 publications

References 471 publications

Locally Superconcentrated Electrolytes for Ultra-Fast-Charging Lithium Metal Batteries with High-Voltage Cathodes

Locally Superconcentrated Electrolytes for Ultra-Fast-Charging Lithium Metal Batteries with High-Voltage Cathodes

Rechargeable Magnesium Batteries using Conversion‐Type Cathodes: A Perspective and Minireview

Methods and Techniques of Solid-State Batteries

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