Effects of Electrolyte Salts on the Electrochemical Performance of Aromatic Polyaroxydiazole Anodes for Pseudocapacitors DOI

Yan Jiang,

Yingying Zhao, Yang Chen

и другие.

ACS Applied Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 18, 2024

Poly(4,4′-biophenylene-1,3,4-oxadiazole) (b-POD) is an n-type conductive polymer (CP) with a high specific capacitance and excellent rate performance. However, its practical application in pseudocapacitors hindered by severe cycling performance decay. Electrolytes, as crucial components, significantly influence the electrochemical of pseudocapacitors. Therefore, selecting appropriate electrolyte essential for improving stability b-POD, thoroughly investigated this study. Larger cations lower surface charge densities require smaller driving force injection into b-POD electrode, resulting more positive doping potential. Particularly, Bu4N+ well-delocalized electronic structure forms weaker interaction negatively charged polarons, facilitating dissociation from thereby ensuring good reversibility stability. In Bu4NBF4 electrolyte, exhibits retention 93.2% after 10 000 cycles, coupled Coulombic efficiency close to 100%. Furthermore, it demonstrates outstanding performance, maintaining 272 F g–1 even at 20 A g–1, which 87.2% tested 1 g–1. Finally, high-performance asymmetric pseudocapacitor energy power has been fabricated. This study aims offer insights design next-generation POD-derived

Язык: Английский

The critical role of interfaces in advanced Li-ion battery technology: A comprehensive review DOI Creative Commons

Mohamed Djihad Bouguern,

Anil Kumar M R,

Karim Zaghib

и другие.

Journal of Power Sources, Год журнала: 2024, Номер 623, С. 235457 - 235457

Опубликована: Сен. 20, 2024

Язык: Английский

Процитировано

11
Ionic Exchange Mechanism in Electrical Double Layer Induced by Stable Passivation Film Boosts High Voltage Performance in Supercapacitors DOI
Hao Liu, Zonglin Yi, Qian Sun

и другие.

ACS Energy Letters, Год журнала: 2024, Номер unknown, С. 1 - 11

Опубликована: Дек. 5, 2024

Язык: Английский

Процитировано

4
LiF Artifacts in XPS Analysis of the SEI for Lithium Metal Batteries DOI
Aosong Gao, Hao Lai,

Mingqiu Duan

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

The solid electrolyte interphase (SEI) is considered to be the key performance of lithium metal batteries (LMBs). analysis SEI and cathode (CEI) composition (especially F 1s spectra) by X-ray photoelectron spectroscopy (XPS) has become a consensus among researchers. However, surface-sensitive XPS characterization susceptible LiF artifacts due several factors, leading overexaggerated role in CEI. In this paper, we conduct systematic study on reasons for LMBs. decomposition CEI components under argon ion sputtering, reaction between Li2CO3 LiPF6 electrolyte, influence different sample pretreatments, selection measurement region, time resulting spectra are investigated. results indicate that high content may attributed artifacts, as consequence. This work sounds an alarm about potential misuse sputtering lack rigorous studies. also helps set up standardized provide more accurate understanding components.

Язык: Английский

Процитировано

0
Mechanisms and Mitigation Strategies of Gas Generation in Sodium-Ion Batteries DOI Creative Commons
Xingyan Li, Xi Chen, Meng Li

и другие.

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Март 10, 2025

Abstract The transition to renewable energy sources has elevated the importance of SIBs (SIBs) as cost-effective alternatives lithium-ion batteries (LIBs) for large-scale storage. This review examines mechanisms gas generation in SIBs, identifying from cathode materials, anode and electrolytes, which pose safety risks like swelling, leakage, explosions. Gases such CO 2 , H O primarily arise instability side reactions between electrode electrolyte, electrolyte decomposition under high temperatures or voltages. Enhanced mitigation strategies, encompassing design, buffer layer construction, material optimization, are deliberated upon. Accordingly, subsequent research endeavors should prioritize long-term high-precision detection bolster performance thereby fortifying their commercial viability furnishing dependable solutions storage electric vehicles.

Язык: Английский

Процитировано

0
Moderately Solvating Ionic Liquid Electrolytes for High-Performance Lithium Metal Batteries DOI
Wenjing Lin, Daoyuan Chen,

Pan Lin

и другие.

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Язык: Английский

Процитировано

0
Multifunctional COF Colloid Regulates Anion Coordination in Solid Poly(Ionic Liquid)‐Based Electrolyte for Lithium Metal Batteries DOI
Hui Chang,

Jinling Zhong,

Zhijun Kang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Abstract The development of solid polymer electrolytes (SPEs) has been significantly impeded by two primary challenges: low ionic conductivity and the inhomogeneous deposition lithium metal anode. Overcoming these limitations needs to reduce crystallization design continuous, stable, fast ion transport pathways. In this study, incorporation covalent organic framework colloid (COF‐C) as a multifunctional additive SPEs is proposed, aiming regulate construct stable electrolyte‐electrode interphases. interaction COF‐C with anions poly(ionic liquid) (PIL) restricts growth PIL spherical crystals reduces crystallinity electrolyte. Acting an anion receptor, promotes uniform Li + distribution enhances kinetics. Additionally, demonstrates coordination create solid‐state electrolyte interphases between SPEs. As result, optimized SPE enables 2.70 × 10 −4 S cm −1 at 25 °C. Li/PIL‐COF‐C/LiFePO 4 / batteries demonstrate exceptional cycle stability, evidenced notable discharge specific capacity 142.4 mAh g 1 C, along commendable retention 93.1% following 500 cycles. addition, PIL‐COF‐C can be adapted higher mass loading LiFePO .

Язык: Английский

Процитировано

0
Dual-functional additives enabling a high-performance silicon–carbon composite anode in pouch cells at high temperatures DOI

Xiao‐He Hou,

Jianlong Cong,

Shiwen Gong

и другие.

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Optimized 8% FEC improves NCM811/Si–C cell cycling at room temperature but fails high temperature. With 0.8% SA forming dual-additive system, performance of cells enhances via thermally stable Li 2 CO 3 -rich SEI.

Язык: Английский

Процитировано

0
Regulation of Coordinated Oxygen Species‐Dominated Mechanochemical Degradation to Stabilize Sodium Iron Hexacyanoferrate Cathode for Sodium‐Ion Batteries DOI

Xianhai Bai,

Zihan Zhang, Tao Jin

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 27, 2025

Abstract The surface coordination environment of sodium iron hexacyanoferrate (FeHCF) cathode is crucial for ensuring its lifespan in sodium‐ion batteries (SIBs). This investigation delves into the impacts coordinated oxygen species on performance FeHCF cathode. It demonstrated that alter electron structure around Fe 2+ exposed at vacancies during cycling, resulting spatial heterogeneity reactive concentration and promoting disordered proliferation electrolyte interface (CEI). Simultaneously, electronic coupling between high spin (HS‐Fe ) weakens strength nearby chemical bonds exacerbates deformation Fe─N Na⁺ ion migration, thereby increasing fracture sensitivity under stress. adverse synergistic interaction leads to collapse prior degradation internal framework. Herein, Na 4 Fe(CN) 6 ∙10H 2 O additive used regulate cathodes, achieving an initial capacity 91.6 mAh g −1 with excellent retention 83.5% after 2000 cycles 1 C. These research findings elucidate predominance mechanism battery provide critical insights developing durable cathodes SIBs.

Язык: Английский

Процитировано

0
Interface Engineering with Multiple Functional Groups Coupling for High-Voltage and Wide-Temperature Sodium Metal Batteries DOI
Yaqin Wu,

Haipeng Zhu,

Binbin Wang

и другие.

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2487 - 2497

Опубликована: Апрель 28, 2025

Язык: Английский

Процитировано

0
Synergistic Kinetics Modulation at Graphite Interface Enables Ultrafast and Durable Potassium‐Ion Batteries DOI

Xuemei Ma,

Hongwei Fu,

Hang Xia

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

Abstract Graphite has been considered as the most promising anode material for potassium‐ion batteries (PIBs) commercialization due to its high theoretical specific capacity and favorable charge‐discharge platform. Nevertheless, in conventional KPF 6 ‐based electrolytes, practical implementation is hindered by sluggish (K + ) transport through solid electrolyte interphase (SEI), leading poor rate capability inferior cycling durability. A nanostructured SiO 2 modification layer constructed on a graphite surface (SiO ‐Graphite) regulate interfacial kinetics, which can enable faster K diffusion lower migration barrier. Notably, ‐Graphite exhibits initial Coulombic efficiency (84.1%), excellent stability (400 cycles with retention of 71%), high‐rate (213 mAh g −1 at current density 500 mA electrolyte. In addition, PB||SiO full cell also demonstrates good (90% after 600 cycles) performance (high 2000 ), outperforms that previously reported PIBs systems. This kinetics regulation strategy provides new insights into improving electrodes.

Язык: Английский

Процитировано

0