Fluorinated Solvent-Coupled Anion-Derived Interphase to Stabilize Silicon Microparticle Anodes for High-Energy-Density Batteries

Article Chemistry, Multidisciplinary

An Amphiphilic Molecule-Regulated Core-Shell-Solvation Electrolyte for Li-Metal Batteries at Ultra-Low Temperature

Junkai Shi et al.

Summary: Researchers have developed a new amphiphilic solvent that improves the performance of lithium metal batteries at low temperatures, enabling faster lithium ion transport and greater cycling stability.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

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Article Nanoscience & Nanotechnology

Tuning the Solvent Alkyl Chain to Tailor Electrolyte Solvation for Stable Li-Metal Batteries

Kui Ding et al.

Summary: This study proposes a rational molecular design method to achieve stable lithium-metal batteries by adjusting the structure of the electrolyte solvents. By shortening the middle alkyl chain and increasing the terminal alkyl chain, a diethoxymethane (DEM) solvent with ultra-weak solvation ability is obtained. The DEM solvent exhibits high lithium Coulombic efficiency and suppresses anodic dissolution, leading to improved cycling performance of the batteries.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Review Chemistry, Multidisciplinary

Microscale Silicon-Based Anodes: Fundamental Understanding and Industrial Prospects for Practical High-Energy Lithium-Ion Batteries

Guanjia Zhu et al.

Summary: This review discusses the challenges in bridging the gap between industrial application and scientific research in Si-based batteries. Microscale design of Si-based electrodes with densified microstructure is seen as a key solution. Additionally, practical metrics and improvement strategies beyond active material are explored.

ACS NANO (2021)

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Article Multidisciplinary Sciences

1000 Wh L-1 lithium-ion batteries enabled by crosslink-shrunk tough carbon encapsulated silicon microparticle anodes

Fanqi Chen et al.

Summary: This study presents a method to enhance the electrochemical performance of microparticulate silicon by designing a strong and ductile carbon cage using capillary shrinkage of graphene hydrogel. The stable structure, similar to plant cells, shows 'imperfection-tolerance' to irregular volume variation of Si microparticles, maintaining electrode integrity over 1000 cycles with high Coulombic efficiency. The dense and thick microparticulate Si anode achieved an ultra-high volumetric energy density of 1048 Wh L-1 at pouch full-cell level.

NATIONAL SCIENCE REVIEW (2021)

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Article Chemistry, Physical

Rational Design of Electrolytes for Long-Term Cycling of Si Anodes over a Wide Temperature Range

Sujong Chae et al.

Summary: A localized high-concentration electrolyte was designed for silicon anodes to enhance cycling stability over a wide temperature range, showing potential for improved battery performance. Full cells using this electrolyte retained 80% capacity after 500 cycles, demonstrating enhanced thermal stability. The electrolyte design principles developed in this study can be applied to extend the cycle life of other high-capacity electrode materials.

ACS ENERGY LETTERS (2021)

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Article Multidisciplinary Sciences

Replacing conventional battery electrolyte additives with dioxolone derivatives for high-energy-density lithium-ion batteries

Sewon Park et al.

Summary: The study introduces a new method using electrolyte additives to form a stable electrode-electrolyte interface architecture with spatial flexibility, which enhances the performance and stability of lithium-ion batteries, allowing for fast charging capabilities.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Rational Electrolyte Design to Form Inorganic-Polymeric Interphase on Silicon-Based Anodes

Shaoxiong Yang et al.

Summary: The research team designed a nonflammable cyclic phosphate-based electrolyte to adjust the component of the electrode/electrolyte interface, which enables the battery to maintain high elasticity and robustness even under high volume changes, achieving extremely high energy density and cycling stability.

ACS ENERGY LETTERS (2021)

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Article Chemistry, Multidisciplinary

Electrolyte Design Enabling a High-Safety and High-Performance Si Anode with a Tailored Electrode-Electrolyte Interphase

Zhang Cao et al.

Summary: This study demonstrates the superior cyclability of silicon anodes in lithium-ion batteries using a nonflammable ether-based electrolyte with dual additives. By forming a high-modulus SEI rich in fluoride and boron species, the Si/Li cells achieve a high initial Coulombic efficiency and low capacity-fading rate. Additionally, full cells pairing the unmodified Si anode with commercial cathodes show extended service life, highlighting the potential for developing high-performance Si-based batteries through Si/electrolyte interphase regulation.

ADVANCED MATERIALS (2021)

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Article Multidisciplinary Sciences

Carbon-free high-loading silicon anodes enabled by sulfide solid electrolytes

Darren H. S. Tan et al.

Summary: The research successfully achieved stable operation of silicon anodes by using the interface passivating properties of sulfide solid electrolytes. Analysis showed that this approach eliminates continuous interfacial growth and irreversible lithium losses. The promising performance of microsilicon full cells can be attributed to the ideal interface properties between microsilicon and sulfide electrolytes and the unique chemomechanical behavior of the lithium-silicon alloy.

SCIENCE (2021)

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Article Energy & Fuels

Calendar aging of silicon-containing batteries

Josefine D. McBrayer et al.

Summary: Silicon-containing batteries are gaining popularity in the mass market, but the calendar aging behaviors of silicon anodes have not been well studied. Researchers are discussing the challenges surrounding the long-term stability of silicon anodes for lithium-ion batteries, especially in high-energy batteries for automotive applications. Future research should focus on assessing and mitigating the time-dependent degradation of silicon-containing batteries to fully realize their benefits.

NATURE ENERGY (2021)

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Article Energy & Fuels