Scaffold-structured polymer binders for long-term cycle performance of stabilized lithium-powder electrodes

Jin, Dahee; Bae, Hyeon-Su; Hong, Jisook; Kim, Sojin; Oh, Jeounghun; Kim, Kyuman; Jo, Taejin; Lee, Yong Min; Lee, Young-Gi; Ryou, Myung‐Hyun

doi:10.1016/j.electacta.2020.136878

Cited by 19 publications

(17 citation statements)

References 63 publications

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“…A diamond blade (width: 1 mm, rake angle: 20°, clearance angle: 10°) was used to cut the porous SEI and measure the cutting force. While cutting the porous SEI, a blade moved horizontally at 2 µm s −1 while maintaining a vertical force of 0.5 N. [ 55 ]…”

Section: Methodsmentioning

confidence: 99%

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Jin

Lim

et al. 2022

Advanced Science

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Despite the promises in high‐energy‐density batteries, Li‐metal anodes (LMAs) have suffered from extensive electrolyte decomposition and unlimited volume expansion owing to thick, porous layer buildup during cycling. It mainly originates from a ceaseless reiteration of the formation and collapse of solid‐electrolyte interphase (SEI). This study reveals the structural and chemical evolutions of the reacted Li layer after different cycles and investigates its detrimental effects on the cycling stability under practical conditions. Instead of the immediately deactivated top surface of the reacted Li layer, the chemical nature underneath the reacted Li layer can be an important indicator of the electrolyte compositional changes. It is found that cycling of LMAs with a lean electrolyte (≈3 g Ah−1) causes fast depletion of salt anions, leading to the dynamic evolution of the reacted Li layer structure and composition. Increasing the salt‐solvent complex while reducing the non‐solvating diluent retards the rate of depletion in a localized high‐concentration electrolyte, thereby demonstrating prolonged cycling of Li||NMC622 cells without compromising the Li Coulombic efficiencies and high‐voltage stability.

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Section: Methodsmentioning

confidence: 99%

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Jin

Lim

et al. 2022

Advanced Science

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“…Jin et al [162] carried out a comparative study between PVdF, PIB, and PI as binders for LMP anodes, as shown in Figure 6b. It was found that the PI-binder-based LMP anodes showed better electrochemical performance than the other counterparts.…”

Section: Improvement Of Adhesion and Porosity Of Lmp Anodesmentioning

confidence: 99%

“…In particular, research is actively underway to enhance LMP anodes by adding functional agents, which aim to form a stable SEI on the Li surface, ensure electrical connectivity, and improve adhesion properties. [66][67][68][69][70][71][72][73][74] Jin et al demonstrated the fabrication of Li anodes as thin as 20 μm across an expansive 145 mm width through a slurry coating technique utilizing LMPs (Figure 1f ). [45] Furthermore, it has been suggested that LMP anodes can efficiently create thinner anodes over larger widths, surpassing traditional extrusion/pressing and deposition/electrodeposition methods.…”

Section: Introductionmentioning

confidence: 99%

Progress and Perspectives on Lithium Metal Powder for Rechargeable Batteries

Dzakpasu,

Kang,

Kim

et al. 2024

Small Structures

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The increasing demand for batteries with high‐energy densities for applications such as electric vehicles necessitates a paradigm shift from the use of conventional graphite as anodes. Li metal is spotlighted as a replacement for graphite due to its ultrahigh theoretical capacity (3860 mAh g−1). However, Li metal foil is plagued with limited cycle life and safety concerns due to poor Coulombic efficiency and uncontrollable growth of Li dendrites. To overcome these challenges, utilizing Li metal in powder form instead of the conventional foil proves to be advantageous. The anode consisting of spherical‐shaped Li metal powders (LMPs) has a larger surface area than Li metal foil, resulting in a lower effective current density. Furthermore, using the powder‐based slurry process facilitates the fabrication of large‐area and thin‐film (≤20 μm) Li anodes. In this review, the various fabrication methods and surface stabilization techniques of LMPs are summarized with their associated patents. Also, research trends with regard to LMP‐based anodes toward high‐performance Li metal batteries (LMBs) are carefully presented. Additionally, the application of LMPs as prelithiation agents in electrode active materials for batteries and capacitors is outlined. Finally, perspectives are suggested regarding the future of LMPs to accelerate the commercialization of advanced LMBs.

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“…In this regard, Li metal powder (LMP) has been effectively studied as a reliable alternative to Li foil in LMBs [47][48][49][50][51][52][53][54][55] due to its higher surface area, [56][57][58] resulting in a lower effective current density. Furthermore, the facile LMP slurry coating process enables the easy manufacture of thinner and wider Li metal electrodes.…”

mentioning

confidence: 99%

Artificial Li₃N SEI-Enforced Stable Cycling of Li Powder Composite Anode in Carbonate Electrolytes

Dzakpasu,

Gyan-Barimah,

Kang

et al. 2024

J. Electrochem. Soc.

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Lithium metal is considered one of the most attractive anode materials for next-generation batteries. However, the practical application of rechargeable Li-metal batteries has been hindered by the uncontrollable growth of Li dendrites and large volume changes during electrochemical cycling, leading to low Coulombic efficiency and safety concerns. This study reports a facile process of printing copper nitride nanowires (Cu¬3N NWs) onto Li metal powder (LMP) composite anode surface via a roll-pressing technique. Cu3N readily reacts with Li to form lithium nitride (Li3N), which is regarded as an excellent component for the interfacial layer on Li metal. The Li3N layer possesses a high ionic conductivity and ensures a homogeneous Li-ion flux, resulting in the suppression of dendrites. As a result, Li/Li symmetric cells assembled with the Li3N-LMP electrode exhibited lower overpotentials and superior cycling performance. Furthermore, NCM622/Li3N-LMP full cells demonstrated better capacity retention behavior (over 90% after 250 cycles) and higher discharge capacities during rate capability tests compared to the bare LMP cell. This study highlights the importance of a rational design of interfacial layers on LMP anodes for stable and long-term cycling.

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Scaffold-structured polymer binders for long-term cycle performance of stabilized lithium-powder electrodes

Cited by 19 publications

References 63 publications

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Progress and Perspectives on Lithium Metal Powder for Rechargeable Batteries

Artificial Li₃N SEI-Enforced Stable Cycling of Li Powder Composite Anode in Carbonate Electrolytes

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Scaffold-structured polymer binders for long-term cycle performance of stabilized lithium-powder electrodes

Cited by 19 publications

References 63 publications

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Structural and Chemical Evolutions of Li/Electrolyte Interfaces in Li‐Metal Batteries: Tracing Compositional Changes of Electrolytes under Practical Conditions

Progress and Perspectives on Lithium Metal Powder for Rechargeable Batteries

Artificial Li3N SEI-Enforced Stable Cycling of Li Powder Composite Anode in Carbonate Electrolytes

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Artificial Li₃N SEI-Enforced Stable Cycling of Li Powder Composite Anode in Carbonate Electrolytes