Cool batteries: What’s next?

Next Energy, Год журнала: 2024, Номер 3, С. 100115 - 100115

Опубликована: Март 23, 2024

Lithium-ion batteries (LIBs) often encounter performance decline issues in cold conditions when temperature significantly drops, despite being widely regarded as a leading battery technology. Functioning typical rocking-chair battery, lithium ions shuttle through the "blood" (the electrolyte) of LIBs between graphite anode commonly-used negative electrode) and intercalation compound cathode (positive electrode), where ion movement tends to slow down with decreasing temperature. Considering relative maturity electrode materials, researchers generally pay attention electrolyte corresponding electrode/electrolyte interphase order accelerate transport. In light significant advancements, we herein try delineate categorize engineering depict what next can be done build better suitable for cooler temperatures near future. Specifically, advances are summarized goal improving ionic conductivity bulk electrolyte, facilitating desolvation dynamics at interface, accelerating across interfacial film. Furthermore, viable strategies outlined understand design principles low-temperature inspire more endeavors overcome critical challenges faced by extreme conditions.

Язык: Английский

---

Entropy‐Assisted Anion‐Reinforced Solvation Structure for Fast‐Charging Sodium‐Ion Full Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 15, 2024

Abstract Anion‐reinforced solvation structure favors the formation of inorganic‐rich robust electrode‐electrolyte interface, which endows fast ion transport and high strength modulus to enable improved electrochemical performance. However, such a unique inevitably injures ionic conductivity electrolytes limits fast‐charging Herein, trade‐off in tuning anion‐reinforced is realized by entropy‐assisted hybrid ester‐ether electrolyte. sheath with more anions occupying inner Na + shell constructed introducing weakly coordinated ether tetrahydrofuran into commonly used ester‐based electrolyte, merits accelerated desolvation energy gradient interface. The attributed diverse structures induced entropy effect. These enhanced rate performance cycling stability Prussian blue||hard carbon full cells electrode mass loading. More importantly, practical application designed electrolyte was further demonstrated industry‐level 18650 cylindrical cells.

Язык: Английский

---

Electrolyte Design via Cation–Anion Association Regulation for High-Rate and Dendrite-Free Zinc Metal Batteries at Low Temperature

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(46), С. 31612 - 31623

Опубликована: Ноя. 12, 2024

Low-temperature zinc metal batteries (ZMBs) are highly challenged by Zn dendrite growth, especially at high current density. Here, starting from the intermolecular insights, we report a cation-anion association modulation strategy matching different dielectric constant solvents and unveil relationship between strength plating/stripping performance low temperatures. The combination of comprehensive characterizations theoretical calculations indicates that moderate ion electrolytes with ionic conductivity (12.09 mS cm

Язык: Английский

---

Electrolyte design weakens lithium-ion solvation energy for a fast-charging and long-cycling Si anode

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Silicon (Si) is considered a promising anode material for next-generation lithium-ion batteries due to its high theoretical specific capacity and earth-abundancy. However, challenges such as significant volume expansion, unstable solid electrolyte interphase (SEI) formation in incompatible electrolytes, slow transport lead poor cycling rate performance. In this work, it demonstrated that superior cyclability capability of Si anodes can be achieved using ethyl fluoroacetate (EFA) fluoroethylene carbonate (FEC) solvents with low binding energy Li+ but sufficiently relative dielectric constants. By weakening the interaction between solvent, barrier desolvation process lowered, while ensuring conductivity diffusion Li+. As result, silicon-carbon optimized exhibits excellent performance, work reversibly 1709.1 mAh g-1 proceeds over 250 cycles retains 85.2% at 0.2C. Furthermore, Si/C‖LiFePO4 (LFP) full cell shows an extended service life more than 500 cycles. This offers valuable insights into design weakly solvating electrolytes high-performance Si-based batteries.

Язык: Английский

---

Key Anodic Interfacial Phenomena and their Control in Next‐Generation Lithium and Sodium Metal Batteries

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Abstract Advancing next‐generation battery technologies requires a thorough understanding of the intricate phenomena occurring at anodic interfaces. This focused review explores key interfacial processes, examining their thermodynamics and consequences in ion transport charge transfer kinetics. It begins with discussion on formation electro chemical double layer, based GuoyChapman model, how carriers achieve equilibrium interface. then delves into essential including metal nucleation growth, development stability solid electrolyte interphase (SEI), movement across In addition, it analyzes impact different solutions—such as low‐ high‐concentration electrolytes localized electrolytes—on these processes. The role additives, co‐solvents, diluents modifying interfaces is also covered. further evaluates techniques for characterizing SEI highlighting strengths limitations both aqueous nonaqueous systems. By comparing challenges opportunities associated systems, this aims to offer new insights respective advantages limitations, ultimately guiding design optimization enhance safety efficiency future energy storage technologies.

Язык: Английский

---