Trace Multifunctional Additive Enhancing 4.8 V Ultra‐High Voltage Performance of Ni‐Rich Cathode and SiOx Anode Battery DOI
Yujing Zhang, Yiming Zhang, Xiaoyi Wang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

Abstract The combination of high‐voltage Ni‐rich cathodes and high‐capacity Si‐based anodes can result in high energy density for next‐generation batteries. However, the practical capacities accesses are severely hindered by unstable electrode/electrolyte interphases (EEI) irreversible structural degradation, which necessitates efficient additives electrolyte generating stable EEI. Herein, a multifunctional additive, 3‐Fluoro‐5‐(4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolan‐2‐yl)picolinonitrile (FTDP) is proposed to construct robust interfaces at both cathodic anodic surface, so as enhance electrochemical performance. FTDP preferentially decomposed form B‐contained cyano (CN) group‐rich cathode interphase (CEI), well LiF‐, Li 3 N‐rich solid (SEI), simultaneously, resulting integrity stability electrodes. Moreover, FTDP‐derived CEI suppress transition metal ions dissolution, further facilitating battery cyclability. multifunctionality FTDP, including quenching free radicals, alleviating hydrolysis LiPF 6 inhibiting HF generation, thus greatly improving interfacial stability. With trace addition 0.2 wt.%, NCM811/Li cell be performed an extreme condition, i.e., ultra‐high voltage (4.8 V), temperature (60 °C) rate (10C). 1.6 Ah NCM811/SiO x pouch delivers capacity retention 84.0% after 300 cycles.

Language: Английский

Optimizing Si─O Conjugation to Enhance Interfacial Kinetics for Low‐Temperature Rechargeable Lithium‐Ion Batteries DOI
Yiwen Wang, Jie Liu, Haoqing Ji

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 20, 2024

Abstract With the growing demand for high‐voltage and wide‐temperature range applications of lithium‐ion batteries (LIBs), requirements electrolytes have become increasingly stringent. While fluorination engineering has enhanced performance traditional solvent systems, it also raised concerns regarding cost, environmental hazards, low reduction stability. Through strategic molecular bond design, a novel class low‐temperature (LT) solvents—siloxanes—is identified, meeting demands LT in LIBs. The d‐p conjugation Si─O enhances voltage resistance weakens Li + ‐solvent interactions. By modulating number conjugated bonds, type anion clusters solvation structure can be controlled, ultimately leading to formation LiF Si─O‐rich interfacial layer facilitating rapid conduction. Consequently, graphite||NCM811 pouch cell (2.3 Ah, 4.45 V) with siloxane‐based electrolyte retains 75.1% room temperature capacity (RTC) at −50 °C. interface kinetics allow superior reversible charging retention 67.6% −40 °C, good cycle stability −20 This study provides new insights into design fortify LIB harsh conditions.

Language: Английский

Citations

10
Sole‐Solvent High‐Entropy Electrolyte Realizes Wide‐Temperature and High‐Voltage Practical Anode‐Free Sodium Pouch Cells DOI Open Access
Yanmei Li, Jiawei Wang, Yingyu Wang

et al.

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

Published: Jan. 21, 2025

Abstract Anode‐free sodium batteries (AFSBs) hold great promise for high‐density energy storage. However, high‐voltage AFSBs, especially those can stably cycle at a wide temperature range are challenging due to the poor electrolyte compatibility toward both cathode and anode. Herein, AFSBs with cycling ability in (−20–60 °C) realized first time via sole‐solvent high‐entropy based on diethylene glycol dibutyl ether solvent (D2) NaPF 6 salt. The unique solvent‐ions effect of strong anion interaction weak cation solvation enables entropy‐driven salt disassociation high‐concentration contact ion pairs, thus simultaneously forming stable anion‐derived electrode–electrolyte interphases Moreover, liquid D2 further extends extremes battery. Consequently, ampere‐hour (Ah)‐level anode‐free pouch cells cyclability −20–60 °C realized. Impressively, cell achieves leadingly high cell‐level density 209 Wh kg −1 capacity retention 83.1% after 100 cycles 25 °C. This work provides inspirations designing advanced electrolytes practical AFSBs.

Language: Английский

Citations

1
F‐Free Fabrication Novel 2D Mo‐Based MBene Catalyst for Advanced Lithium–Sulfur Batteries DOI Open Access
Jun Pu, Shanshan Fan, Zihan Shen

et al.

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

Published: Feb. 7, 2025

Abstract An efficient electrocatalytic medium is very important for lithium–sulfur (Li–S) batteries. Herein, as a novel MBene‐based material, 2D MoB employed to facilitate the catalytic conversion of lithium polysulfides (LiPSs). Instead HF etching technology previous MXene, accordion‐like MoB‐based MBene adopts hydrothermal‐assisted process. Its F‐free surface property prevents harm negative sulfur cathode from −F terminations. The high charge conductivity and abundant active sites promote adsorption‐transfer LiPSs on accelerate redox kinetics. Theoretical calculation, visual detection in situ Raman results show that stratified MoB‐coated separator inhibits “shuttle effect” soluble through coupling physical chemical mechanisms. Therefore, this work achieves commendable stability 847 mAh g −1 reversible capacity (2.0 C) 0.0651% attenuation rate per cycle (4.0 C). area 4.93 cm −2 still obtained under loading. More importantly, has uncovered great potential promising catalyst reaction species.

Language: Английский

Citations

1
Fully Methylated Siloxane-Based Electrolyte for Practical Lithium Metal Batteries DOI
Yuankun Wang,

Youxuan Ni,

Shuo Xu

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Developing solvents with balanced physicochemical properties for high-voltage cathodes and lithium metal anodes is crucial a sustainable intelligent future. Herein, we report fully methylated tetramethyl-1,3-dimethoxydisiloxane (TMMS) as single solvent batteries. We demonstrate that the structure Si-O bonds within TMMS can effectively elevate dehydrogenation energy barrier, migrating oxidation decomposition of electrolyte. Additionally, weak solvating power favors formation an anion-rich solvation induces generation inorganic-rich electrode/electrolyte interphase layer at both cathode anode. Accordingly, formulated electrolyte exhibits remarkable stability against anodes. Notably, LiNi0.8Co0.1Mn0.1O2||Li (NCM811||Li) full cells TMMS-based electrolytes realize significant improvement in capacity retention compared dimethoxyethane-based room temperature 50 °C. This work provides insight into methylation bond strategy paves way development

Language: Английский

Citations

1
Modulating the Li‐Ion Transport Pathway of Succinonitrile‐Based Plastic Crystalline Electrolytes for Solid‐State Lithium Metal Batteries DOI

Xue Ye,

Fu Han, Yixiao Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Abstract Succinonitrile (SCN) based plastic crystal electrolytes (SPCEs) have attracted much attention for lithium metal batteries due to their considerable ionic conductivity and thermal stability. Insufficient mechanical properties, weak reductive stability, the presence of free SCN molecules can result in adverse interfacial reactions. Polymer introduction has been explored address these challenges. However, polymer affects state, leading reduced conductivity, potentially limited segmental motion at room temperature. Herein, a cross‐linked network strategy is proposed modify Li‐ion transport pathway SPCE, aiming significantly improve conductivity. The strong interaction between matrix enhances mutual solubility, reduces crystallinity SCN, forms rapid conduction (polymer—[SCN—Li + ]). SPCE increases 1.28 mS cm −1 , with migration number ( t Li+ ) also rising 0.7. Electrochemical performances Li symmetrical, Li||LiFePO 4 Li||LiNi 0.8 Co 0.1 Mn O 2 cells show significant improvement both temperature 0 °C. These findings suggest that designing structures SPCEs holds promise solid‐state battery applications.

Language: Английский

Citations

6
Non‐Fluorinated Cyclic Ether‐Based Electrolyte with Quasi‐Conjugate Effect for High‐Performance Lithium Metal Batteries DOI
Xiao Zhu, Jiawei Chen, Gaopan Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Aug. 29, 2024

Fluorinated ether-based electrolytes are commonly employed in lithium metal batteries (LMBs) to attenuate the coordination ability of ether solvents with Li

Language: Английский

Citations

5
Modulating Interfacial Solvation via Ion Dipole Interactions for Low‐Temperature and High‐Voltage Lithium Batteries DOI Open Access

Ping Liang,

Jinhan Li,

Dong Yang

et al.

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

Published: Nov. 4, 2024

Extending the stability of ether solvents is pivotal for developing low-temperature and high-voltage lithium batteries. Herein, we elucidate oxidation behavior tetrahydrofuran with ternary BF

Language: Английский

Citations

5
Regulating Non‐Equilibrium Solvation Structure in Locally Concentrated Ionic Liquid Electrolytes for Wide‐Temperature and High‐Voltage Lithium Metal Batteries DOI
Haifeng Tu, Zhicheng Wang,

Jiangyan Xue

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Oct. 4, 2024

The development of high-voltage lithium metal batteries (LMBs) encounters significant challenges due to aggressive electrode chemistry. Recently, locally concentrated ionic liquid electrolytes (LCILEs) have garnered attention for their exceptional stability with both Li anodes and cathodes. However, there remains a limited understanding how diluents in LCILEs affect the thermodynamic solvation structure transportation dynamics

Language: Английский

Citations

4
Engineering an Inorganic-Rich Interphase with Versatile Nonflammable Electrolytes toward Stable Alkali Metal Batteries DOI
Shuo Zhang,

Guo Yang,

Yanan Lai

et al.

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1127 - 1134

Published: Feb. 21, 2025

Language: Английский

Citations

0
Regulating Interfacial Wettability for Fast Mass Transfer in Rechargeable Metal-Based Batteries DOI
Ruijuan Shi, Shilong Jiao, Zhao Yang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

The interfacial wettability between electrodes and electrolytes could ensure sufficient physical contact fast mass transfer at the gas-solid-liquid, solid-liquid, solid-solid interfaces, which improve reaction kinetics cycle stability of rechargeable metal-based batteries (RMBs). Herein, engineering multiphase interfaces is summarized from electrolyte electrode aspects to promote interface rate durability RMBs, illustrates revolution that taking place in this field thus provides inspiration for future developments RMBs. Specifically, review presents principle macro- microscale summarizes emerging applications concerning effect on Moreover, deep insight into development provided outlook. Therefore, not only insights but also offers strategic guidance modification optimization toward stable electrode-electrolyte

Language: Английский

Citations

0