Tri‐anion solvation structure electrolyte improves the electrochemical performance of Li||LiNi0.8Co0.1Mn0.1O2 batteries DOI

Miaolan Sun,

Yuxiang Xie,

Huayu Huang

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: July 30, 2024

Abstract Li||LiNi 0.8 Co 0.1 Mn O 2 batteries, which consist of lithium metal anode (LMA) matched with NCM811 cathode, have an energy density more than twice that ion battery (LIB). However, the unstable electrode/electrolyte interface still hinders its practical application. Ether electrolytes show promise in improving stability LMA and cathodes. a robust stable Li||NCM811 batteries cannot be easily efficiently achieved most ether reported present studies. Herein, we straightforward efficient tri‐anion synergistic strategy to overcome this bottleneck. The addition ClO 4 − NO 3 anions LiFSI‐based forms unique solvation structure (FSI /ClO /NO ) participation (LB511). This not only enhances electrochemical window but also achieves interface. interaction between electrode electrolyte is suppressed inorganic‐rich (LiF/Li N/LiCl) SEI/CEI layer formed. Meanwhile, coordination LB511 increases overpotential for Li deposition, resulting uniform dense deposition. Therefore, Li||Cu cells using average CE 99.6 %. was cycled stably 250 cycles capacity retention 81 % (N/P=2.5, 0.5 C).

Language: Английский

Enhancing Li+ Transportation at Graphite‐Low Concentration Electrolyte Interface Via Interphase Modulation of LiNO3 and Vinylene Carbonate DOI Creative Commons
Yin Quan, Xiaoling Cui, Ling Hu

et al.

Carbon Neutralization, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 3, 2024

ABSTRACT The solvent‐rich solvent sheath in low‐concentration electrolytes (LCEs) not only results high desolvation energy of Li + , but also forms organic‐rich solid electrolyte interface film (SEI) with poor conductivity, which hinders transport at the electrode‐electrolyte and greatly limits application LCEs. Here, electrochemical performance LCEs is enhanced by dual interfacial modification LiNO 3 vinylene carbonate (VC) additives. Results show that preferentially reduced about 1.65 V to form an inorganic‐rich incomplete SEI inner layer. formation N LiN x O y inorganic components helps achieve rapid film, bare electrode surface caused layer provides a place for subsequent decomposition VC. Then, lower potential 0.73 V, VC generate poly(VC)‐rich outer layer, lithium‐philic sites weakens interaction between ethylene (EC). modulates solvation structure reduces . This ingenious design bilayer enhances inhibits traditional solvents swelling graphite. As result, battery using 0.5 M LiPF 6 EC/diethyl (DEC) 0.012 vt% improved higher level than one 1.0 EC/DEC electrolyte. research expands strategy promising applications constructing favorable enhance interface.

Language: Английский

Citations

10
Tuning solvation structure to enhance low temperature kinetics of lithium-ion batteries DOI

Junwei Zhang,

Jinlong Sun,

Dongni Zhao

et al.

Energy storage materials, Journal Year: 2024, Volume and Issue: 72, P. 103698 - 103698

Published: Aug. 11, 2024

Language: Английский

Citations

9
Double-edged Effects of Electrolyte Additive on Interfacial Stability in Fast-Charging Lithium-Ion Batteries DOI

Hyuntae Lee,

Jung Mann Doh,

Soyeon Lee

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Essential, but not too much-Roles of electrolyte additive (FEC) in Li

Language: Английский

Citations

2
Interfacial Decomposition Behaviour of Triethyl Phosphate‐Based Electrolytes for Lithium‐Ion Batteries DOI Creative Commons
Florian Gebert, Robin Lundström, Wessel van Ekeren

et al.

Batteries & Supercaps, Journal Year: 2024, Volume and Issue: unknown

Published: July 15, 2024

Abstract Triethyl phosphate (TEP) is a cheap, environmentally benign, and non‐flammable electrolyte solvent, whose implementation in lithium‐ion batteries held back by its co‐intercalation into graphite anodes, resulting exfoliation of the structure. In this work, electrode‐electrolyte interface behaviour electrolytes containing up to 100 % TEP investigated correlated electrochemical performance. High capacity stable cycling are maintained with 30 carbonate ester‐based electrolytes, but above threshold reversibility Li + intercalation drops sharply almost zero. This represents potential route improved battery safety, while can also improve safety indirectly enabling use lithium bis(oxalato)borate, fluorine‐free salt limited solubility traditional electrolytes. To understand poor performance at concentrations >30 %, solvation interfacial reaction chemistry were studied. Nuclear magnetic resonance spectroscopy data confirms changes shell TEP, operando gas analysis indicates extensive evolution from decomposition electrode concentration, which entirely absent below it. X‐ray photoelectron depth profiling electrodes demonstrates passivation solid interphase significant exfoliation.

Language: Английский

Citations

1
Tri‐anion solvation structure electrolyte improves the electrochemical performance of Li||LiNi0.8Co0.1Mn0.1O2 batteries DOI

Miaolan Sun,

Yuxiang Xie,

Huayu Huang

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: July 30, 2024

Abstract Li||LiNi 0.8 Co 0.1 Mn O 2 batteries, which consist of lithium metal anode (LMA) matched with NCM811 cathode, have an energy density more than twice that ion battery (LIB). However, the unstable electrode/electrolyte interface still hinders its practical application. Ether electrolytes show promise in improving stability LMA and cathodes. a robust stable Li||NCM811 batteries cannot be easily efficiently achieved most ether reported present studies. Herein, we straightforward efficient tri‐anion synergistic strategy to overcome this bottleneck. The addition ClO 4 − NO 3 anions LiFSI‐based forms unique solvation structure (FSI /ClO /NO ) participation (LB511). This not only enhances electrochemical window but also achieves interface. interaction between electrode electrolyte is suppressed inorganic‐rich (LiF/Li N/LiCl) SEI/CEI layer formed. Meanwhile, coordination LB511 increases overpotential for Li deposition, resulting uniform dense deposition. Therefore, Li||Cu cells using average CE 99.6 %. was cycled stably 250 cycles capacity retention 81 % (N/P=2.5, 0.5 C).

Language: Английский

Citations

0