A Multifunctional Catalytic Interlayer for Propelling Solid–Solid Conversion Kinetics of Li2S2 to Li2S in Lithium–Sulfur Batteries DOI

Xintao Zuo,

Mengmeng Zhen, Dapeng Liu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(15)

Published: Jan. 15, 2023

Abstract The theoretically high‐energy‐density lithium–sulfur batteries (LSBs) are seriously limited by the disadvantages including shuttle effect of soluble lithium polysulfides (LiPSs) and sluggish sulfur redox kinetics, especially for most difficult solid–solid conversion Li 2 S to S. Herein, a multifunctional catalytic interlayer improve performance LSBs is tried introduce, in which Fe 1– x S/Fe 3 C nanoparticles embedded N/S dual‐doped carbon network (NSC) composed nanosheets nanotubes (the final product named as FeSC@NSC). well‐designed 3D NSC endows with satisfactory LiPSs capture‐catalytic ability, thus ensuring fast reaction kinetics suppressing shuttling. density functional theory calculations disclose mechanisms that FeSC@NSC greatly improves liquid–solid (LiPSs ) unexpectedly (Li S) one. As result, based on can achieve high specific capacity 1118 mAh g −1 at current 0.2 C, relatively stable 415 large 2.0 after 700 cycles well superior rate performance.

Language: Английский

Cooperative Electronic Structure Modulator of Fe Single‐Atom Electrocatalyst for High Energy and Long Cycle Li–S Pouch Cell DOI
Won‐Gwang Lim, Cheol‐Young Park, Hyeonjung Jung

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(10)

Published: Dec. 17, 2022

High-energy and long cycle lithium-sulfur (Li-S) pouch cells are limited by the insufficient capacities stabilities of their cathodes under practical electrolyte/sulfur (E/S), electrolyte/capacity (E/C), negative/positive (N/P) ratios. Herein, an advanced cathode comprising highly active Fe single-atom catalysts (SACs) is reported to form 320.2 W h kg-1 multistacked Li-S with total capacity ≈1 A level, satisfying low E/S (3.0), E/C (2.8), N/P (2.3) ratios high sulfur loadings (8.4 mg cm-2 ). The high-activity SAC designed manipulating its local environments using electron-exchangeable binding (EEB) sites. Introducing EEB sites two different types S species, namely, thiophene-like-S (-S) oxidized-S (-SO2 ), adjacent SACs promotes kinetics Li2 redox reaction providing additional modulating d-orbital levels via electron exchange Fe. -S donates electrons SACs, whereas -SO2 withdraws from SACs. Thus, energy level can be modulated /-S site, controlling donating/withdrawing characteristics. This desirable electrocatalysis maximized intimate contact which confined together in porous carbon.

Language: Английский

Citations

74
Controllable catalysis behavior for high performance lithium sulfur batteries: From kinetics to strategies DOI

Guiqiang Cao,

Ruixian Duan,

Xifei Li

et al.

EnergyChem, Journal Year: 2022, Volume and Issue: 5(1), P. 100096 - 100096

Published: Nov. 18, 2022

Language: Английский

Citations

70
Oxygen Defect‐Rich WO3−x–W3N4 Mott–Schottky Heterojunctions Enabling Bidirectional Catalysis for Sulfur Cathode DOI
Dan Zhang,

Tengfei Duan,

Yixin Luo

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(42)

Published: Aug. 30, 2023

Abstract The serious shuttle effect and intrinsically sluggish oxidation–reduction reaction kinetics of polysulfides severely hinder the practical commercialization lithium–sulfur (Li–S) batteries. Herein, oxygen‐defect‐rich WO 3− x –W 3 N 4 Mott–Schottky heterojunctions are designed as efficient catalysts. Based on theoretical calculations comprehensive experimental characterization, exhibits a lower free energy change (1.03 eV) Li 2 S decomposition barrier (0.92 than W , which significantly enhances sulfur reduction (SRR) activity. Furthermore, relationship between catalytic activity gaps in d p bands centers (Δ d–p ) is also established, with low Δ heterojunction leading to antibonding state energy, promotes electron transfer interfacial redox kinetics. Oxygen vacancies can improve without affecting adsorption. Hence, Li–S battery using @CC/S exhibited outstanding rate duration performance (913.9 mAh g –1 at C, stable 400 cycles 1 C). Impressively, achieves high areal capacity 5.0 cm −2 under loading 4.98 mg .

Language: Английский

Citations

65
Enhanced catalytic activity of Co-CoO via VC0.75 heterostructure enables fast redox kinetics of polysulfides in Lithium-Sulfur batteries DOI

Wenlong Xia,

Yan Chen,

Wenxi Wang

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 458, P. 141477 - 141477

Published: Jan. 17, 2023

Language: Английский

Citations

54
A Multifunctional Catalytic Interlayer for Propelling Solid–Solid Conversion Kinetics of Li2S2 to Li2S in Lithium–Sulfur Batteries DOI

Xintao Zuo,

Mengmeng Zhen, Dapeng Liu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(15)

Published: Jan. 15, 2023

Abstract The theoretically high‐energy‐density lithium–sulfur batteries (LSBs) are seriously limited by the disadvantages including shuttle effect of soluble lithium polysulfides (LiPSs) and sluggish sulfur redox kinetics, especially for most difficult solid–solid conversion Li 2 S to S. Herein, a multifunctional catalytic interlayer improve performance LSBs is tried introduce, in which Fe 1– x S/Fe 3 C nanoparticles embedded N/S dual‐doped carbon network (NSC) composed nanosheets nanotubes (the final product named as FeSC@NSC). well‐designed 3D NSC endows with satisfactory LiPSs capture‐catalytic ability, thus ensuring fast reaction kinetics suppressing shuttling. density functional theory calculations disclose mechanisms that FeSC@NSC greatly improves liquid–solid (LiPSs ) unexpectedly (Li S) one. As result, based on can achieve high specific capacity 1118 mAh g −1 at current 0.2 C, relatively stable 415 large 2.0 after 700 cycles well superior rate performance.

Language: Английский

Citations

53