A sterically-hindered organic molecule to modulate hydrogen bonding and the electrical double layer for highly reversible zinc anodes

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

---

LiC₆@Li as a Promising Substitution of Li Metal Counter Electrode for Low‐Temperature Battery Evaluation

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Li metal, as a counter electrode, is widely used for electrode materials evaluation in coin type half-cells. However, whether this configuration suitable different working conditions has often been neglected. Herein, the large resistance and high cathodic/anodic over-potential of metal at low temperature are highlighted, revealing its incompetence on cryogenic condition. In view this, novel LiC6@Li composite developed promising substitution evaluation. Li+ de-intercalated from LiC6 preferentially due to interface LiC6, presenting 0.05 V (67 µA cm-2) -20 °C, which ten times lower than that metal. Moreover, rapid lithium replenishment into enables stable potential LiC6@Li. Consequently, LiC6@Li-based half-cells enabled more precise storage specific capacities series temperature. As an extension, KC8@K also successfully prepared superior K This work proposes accurately evaluating subfreezing scenarios, demonstrating necessity specialized systems particular operating conditions.

Language: Английский

---

Loosely coordinating diluted highly concentrated electrolyte toward −60 °C Li metal batteries

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 90, P. 380 - 387

Published: Nov. 10, 2023

Language: Английский

---

A crown-ether-enabled eutectic electrolyte for ultra-high temperature lithium metal batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: 67, P. 103285 - 103285

Published: Feb. 20, 2024

Language: Английский

---

Anionic Aggregates Induced Interphase Chemistry Regulation toward Wide‐Temperature Silicon‐Based Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)

Published: July 22, 2024

Abstract Silicon nanoparticles (SiNPs) show great promise as high‐capacity anodes owing to their ability mitigate mechanical failure. However, the substantial surface area of SiNPs triggers interfacial side reactions and solid electrolyte interphase (SEI) permeation during volume fluctuations. The slow kinetics at low temperatures degradation SEI high further hinder practical application in real‐world environments. Here, these challenges are addressed by manipulating solvation structure through molecular space hindrance. enables anions aggregate outer Helmholtz layer under an electric field, leading rapid desolvation capabilities formation anion‐derived SEI. resulting double‐layer SEI, where inorganic nano‐clusters uniformly dispersed amorphous structure, completely encapsulates particles first cycle. ultra‐high modulus this can withstand stress accumulation, preventing penetration repeated expansion contraction. As a result, SiNPs‐based batteries demonstrate exceptional electrochemical performance across wide temperature range from −20 60 °C. Moreover, assembled 80 mAh SiNPs/LiFePO 4 pouch cells maintain cycling retention 85.6% after 150 cycles, marking significant step forward silicon‐based batteries.

Language: Английский

---

Electrolyte Engineering to Construct Robust Interphase with High Ionic Conductivity for Wide Temperature Range Lithium Metal Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 18, 2024

Abstract Unstable interphase formed in conventional carbonate‐based electrolytes significantly hinders the widespread application of lithium metal batteries (LMBs) with high‐capacity nickel‐rich layered oxides (e.g., LiNi 0.8 Co 0.1 Mn O 2 , NCM811) over a wide temperature range. To balance ion transport kinetics and interfacial stability range, herein bifunctional electrolyte (EAFP) tailoring electrode/electrolyte 1,3‐propanesultone as an additive was developed. The resulting cathode‐electrolyte inorganic inner layer organic outer possesses high mechanical flexibility, alleviating stress accumulation maintaining structural integrity NCM811 cathode. Meanwhile, inorganic‐rich solid inhibits side reactions facilitates fast Li + transport. As result, Li||Li cells exhibit stable performance extensive temperatures low overpotentials, especially achieving long lifespan 1000 h at 30 °C. Furthermore, optimized EAFP is also suitable for LiFePO 4 LiCO cathodes (1000 cycles, retention: 67 %). Li||NCM811 graphite||NCM811 pouch lean (g/Ah grade) operate stably, verifying broad electrode compatibility EAFP. Notably, can climate range from −40 °C to 60 This work establishes new guidelines regulation by all‐weather LMBs.

Language: Английский

---

Unlocking fast‐charging capabilities of lithium‐ion batteries through liquid electrolyte engineering

EcoMat, Journal Year: 2024, Volume and Issue: 6(7)

Published: June 20, 2024

Abstract Global trends toward green energy have empowered the extensive application of high‐performance storage systems. With worldwide spread electric vehicles (EVs), lithium‐ion batteries (LIBs) capable fast‐charging become increasingly important. Nonetheless, state‐of‐the‐art LIBs failed to satisfy demands prospective customers, including rapid charging, extended cycle life, and high density. Addressing these challenges through innovations in material science other advanced battery technologies is essential for meeting growing customers. Besides choice active materials, electrolyte formulation has a significant impact on performance life over wide range temperatures. The liquid typically composed lithium salts provide an ion source, solvents carry Li + ions, functional additives build stable solid interphase (SEI). To enable fast movement electrolytes should low viscosity ionic conductivity. Meanwhile, SEI layers must be thin, uniform ionically conductive. Furthermore, binding solvent facilitates desolvation solvation sheath, enabling transport anode during charging. This review provides latest insights into focusing ensuring deeper understanding chemistry. involvement existing mechanisms materials discovery will develop engineering techniques improve temperature also facilitate development EV‐adoptable electrodes. image

Language: Английский

---

Quantification of Charge Transport and Mass Deprivation in Solid Electrolyte Interphase for Kinetically‐Stable Low‐Temperature Lithium‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: July 3, 2024

Graphite (Gr)-based lithium-ion batteries with admirable electrochemical performance below -20 °C are desired but hindered by sluggish interfacial charge transport and desolvation process. Li salt dissociation via

Language: Английский

---

Electrolyte Design Enables Rechargeable LiFePO4/Graphite Batteries from −80°C to 80°C

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: July 15, 2024

Abstract Lithium iron phosphate (LFP)/graphite batteries have long dominated the energy storage battery market and are anticipated to become dominant technology in global power market. However, poor fast‐charging capability low‐temperature performance of LFP/graphite seriously hinder their further spread. These limitations strongly associated with interfacial lithium (Li)‐ion transport. Here we report a wide‐temperature‐range ester‐based electrolyte that exhibits high ionic conductivity, fast kinetics excellent film‐forming ability by regulating anion chemistry Li salt. The barrier is quantitatively unraveled employing three‐electrode system distribution relaxation time technique. superior role proposed preventing 0 plating sustaining homogeneous stable interphases also systematically investigated. cells exhibit rechargeability an ultrawide temperature range −80 °C 80 outstanding without compromising lifespan. Specially, practical pouch achieve 80.2 % capacity retention after 1200 cycles (2 C) 10‐min charge 89 (5 at 25 provide reliable even °C.

Language: Английский

---

Electrolyte Design Enables Stable and Energy‐dense Potassium‐ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Abstract Free from strategically important elements such as lithium, nickel, cobalt, and copper, potassium‐ion batteries (PIBs) are heralded promising low‐cost sustainable electrochemical energy storage systems that complement the existing lithium‐ion (LIBs). However, reported performance of PIBs is still suboptimal, especially under practically relevant battery manufacturing conditions. The primary challenge stems lack electrolytes capable concurrently supporting both low‐voltage anode high‐voltage cathode with satisfactory Coulombic efficiency (CE) cycling stability. Herein, we report a electrolyte facilitates commercially mature graphite (>3 mAh cm −2 ) to achieve an initial CE 91.14 % (with average around 99.94 %), fast redox kinetics, negligible capacity fading for hundreds cycles. Meanwhile, also demonstrates good compatibility 4.4 V ( vs . K + /K) 2 Mn[Fe(CN) 6 ] (KMF) cathode. Consequently, KMF||graphite full‐cell without precycling treatment electrodes can provide discharge voltage 3.61 specific 316.5 Wh kg −1 −(KMF+graphite), comparable LiFePO 4 ||graphite LIBs, maintain 71.01 retention after 2000

Language: Английский

---