Rationally Tailoring Superstructured Hexahedron Composed of Defective Graphitic Nanosheets and Macropores: Realizing Durable and Fast Potassium Storage DOI Creative Commons
Fei Yuan,

Conghao Shi,

Yanan Li

et al.

Advanced Science, Journal Year: 2022, Volume and Issue: 10(3)

Published: Nov. 24, 2022

Multipores engineering composed of micro/mesopores is an effective strategy to improve potassium storage performance via providing enormous adsorption sites and shortened ions diffusion distance. However, a detailed exploration the role played by macropores in still lacking has been barely reported until now. Herein, superstructure carbon hexahedron (DGN-900) synthesized using poly tannic acid (PTA) as precursor. Due spatially confined two-step local contraction PTA along different directions dimensions during pyrolysis, defective nanosheets with are formed, while realizing balance between defects content graphitization degree regulating temperature. The presence conducive accelerating electrolyte rapid infiltration within electrode, its pore volume can accommodate electrode structure fluctuation upon cycling, most suitable ratio graphitic provides rich sufficient electrons transfer channels, simultaneously. These advantages enable prominent electrochemical DGN-900 including high rate (202.9 mAh g-1 at 2 A ) long cycling stability over 2000 cycles. This unique fabrication strategy, that is, coupled structure, makes fast durable possible.

Language: Английский

Cobalt Nanoparticles Synergize with Oxygen‐Containing Functional Groups to Realize Fast and Stable Potassium Storage for Carbon Anode DOI
Fei Yuan, Yanan Li, Yaqing Wang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(46)

Published: July 8, 2023

Abstract Oxygen‐containing functional groups (OFGs) grafted by carbon materials surface can serve as active sites to reversibly store potassium and simultaneously contribute forming a stable solid‐electrolyte interphase layer, leading increased capacity cycling stability. However, the excessive OFGs will damage conductivity hence causes increase in electron transfer resistance, easily resulting poor rate. Herein, it is theoretically demonstrated that embedded metallic Co particles synergize with C‐O‐C moieties accelerate K‐ion adsorption (△ E = −1.62 eV) regulate electronic structure, ensuring high In view of this, O‐doped implanted well established, found pyrolysis temperature effectively content proportion. Various characterizations unveil introduced species not only evidently promote capability K‐ion, but catalyze generation graphitic carbon. Benefiting from these merits (e.g., enhanced ability conductivity), sample optimal proportion presents 254.7 mAh g −1 an excellent rate (202.9 at 2 A ). The unique design route makes fast K‐storage anode possible.

Language: Английский

Citations

34
Regulating Graphitic Microcrystalline and Single‐Atom Chemistry in Hard Carbon Enables High‐Performance Potassium Storage DOI

Wenbin Xu,

Huaidong Li,

Xinyue Zhang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(12)

Published: Dec. 6, 2023

Abstract Hard carbon (HC) has attracted considerable research interest as the most promising anode for potassium‐ion batteries (PIBs) due to its tunable interlayer spacing and abundant voids accommodate K + . However, practical application of hard is severely hampered by low initial Coulombic efficiency (ICE) high plateau potential. Herein, a manganese ion‐catalyzed pyrolysis strategy explored regulate graphitic microcrystalline structure localized electron distribution in that greatly improve storage ICE. Systematic experimental measurements, situ/ex situ observations, dynamic analysis, density functional theory calculations elucidate introduction Mn 2+ ions could catalyze formation short‐ordered nanodomains provide insertions , meanwhile induce through Mn─N 3 ─C coordination enable diffusion transfer kinetics. Consequently, modulated exhibits low‐potential–plateau capacity, excellent rate capability, potassium half‐cell configurations. More importantly, charge mechanism “adsorption–intercalation” proposed based on correlation between structures discharge/charge plateau. This work provides an in‐depth insight into fundamentals microstructure regulation high‐performance PIBs.

Language: Английский

Citations

34
Converting renewable saccharides to heteroatom doped porous carbons as supercapacitor electrodes DOI
Aparna Deshpande, Shivam Rawat, Indrajit Patil

et al.

Carbon, Journal Year: 2023, Volume and Issue: 214, P. 118368 - 118368

Published: Aug. 15, 2023

Language: Английский

Citations

32
High-entropy two-dimensional metal phosphorus trichalcogenides boost high-performance potassium ion storage devices via electrochemical reconstruction DOI Open Access

Po-Wen Chien,

Che‐Bin Chang, Hsing‐Yu Tuan

et al.

Energy storage materials, Journal Year: 2023, Volume and Issue: 61, P. 102853 - 102853

Published: June 23, 2023

Language: Английский

Citations

31
Manipulating High-Valent Cobalt-Oxo Generation on Co/N Codoped Carbon Beads via PMS Activation for Micropollutants Degradation DOI

Junjun Pei,

Kaixing Fu,

Yukui Fu

et al.

ACS ES&T Engineering, Journal Year: 2023, Volume and Issue: 3(11), P. 1997 - 2007

Published: Sept. 20, 2023

Manipulating high-valent cobalt-oxo [Co(IV)═O] species in a catalytic system is pivotal; however, it challenging due to the inefficiency and unsustainability of Co(IV)═O generation. In this study, we fabricated macroscopic porous Co/N codoped carbon beads (Co–NC) identified as prominent peroxymonosulfate (PMS) activation. Specifically, on Co–NC-900/PMS was regarded crucial driver tetracycline (TC) removal (with degradation efficiency 97.3% an initial concentration 20 mg L–1) through quenching experiments, methyl phenyl sulfoxide (PMSO) degradation, sulfone (PMSO2) Importantly, Co–Nx active sites are responsible for formation species, which contribute much 98.33% TC based calculation steady-state concentration. addition, relative contributions toward various micropollutants substrate-specific related their ionization potential (IP). The practical application Co–NC-900 further evaluated continuous flow mode, showed excellent durability performance. Overall, have aroused importance heterogeneous systems provided alternative catalyst that can be potentially exploited real water decontamination scenarios.

Language: Английский

Citations

29
ZIF-67-derived Co/CoSe ultrafine nanocrystal Schottky heterojunction decorated hollow carbon nanospheres as new-type anodes for potassium-ion batteries DOI Open Access
Haonan Wang, Kaifeng Yu, Pengtao Wang

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 645, P. 55 - 65

Published: April 23, 2023

Language: Английский

Citations

28
Hierarchically designed MoWSe2/WO3/C anode for fast and efficient Na+ storage DOI
Jian Wang,

Yachuan Shao,

Fei Yuan

et al.

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 80, P. 291 - 301

Published: Feb. 2, 2023

Language: Английский

Citations

25
Optimizing Kinetics for Enhanced Potassium‐Ion Storage in Carbon‐Based Anodes DOI Open Access
Keke Yang, Wang Zhou, Qingfeng Fu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(44)

Published: Aug. 29, 2023

Abstract The sluggish kinetics in traditional graphite anode greatly limits its fast‐charging capability, which is critically important for commercialization of potassium ion batteries (PIBs). Hard carbon possesses randomly oriented pseudo‐graphitic crystallites, enabling homogeneous reaction current and superior rate performance. Herein, a series hybrid anodes with different hard carbon/graphite ratios are prepared by uniformly mixing ball‐milling. Comprehensive experimental results combination phase‐field simulations reveal that the an intriguing potential difference between K + ‐adsorbed non‐potassiated graphite. promotes sufficient utilization electrode material, leading to increase reversible capacity. present provides additional electric field force facilitates diffusion from into nearest neighbor All these together, emphasize synergistic effects toward satisfactory cycling strategy proposed here compatible commercial battery manufacturing, offering practical pathway development high‐performance PIBs.

Language: Английский

Citations

24
Recent Progress on Designing Carbon Materials by Structural Tuning and Morphological Modulation as K+-Storage Anodes DOI
Jiafeng Ruan,

Sainan Luo,

Qin Li

et al.

Electrochemical Energy Reviews, Journal Year: 2024, Volume and Issue: 7(1)

Published: July 10, 2024

Language: Английский

Citations

13
The effect of salt anion in ether‐based electrolyte for electrochemical performance of sodium‐ion batteries: A case study of hard carbon DOI Creative Commons
Jiabao Li,

Jingjing Hao,

Quan Yuan

et al.

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(8)

Published: March 13, 2024

Abstract Compared with the extensively used ester‐based electrolyte, hard carbon (HC) electrode is more compatible ether‐based counterpart in sodium‐ion batteries, which can lead to improved cycling stability and robust rate capability. However, impact of salt anion on electrochemical performance HC electrodes has yet be fully understood. In this study, anionic chemistry regulating electrolytes batteries have been systematically investigated. This work shows discrepancies reductive group, redox kinetics, component/structure solid electrolyte interface (SEI) different salts (NaBF 4, NaPF 6 , NaSO 3 CF ) typical ether solvent (diglyme). Particularly, density functional theory calculation manifests preferred decomposition PF − due reduced anions solvation structure, thus leading formation NaF‐rich SEI. Further investigation kinetics reveals that /diglyme induce fast ionic diffusion dynamic low charge transfer barrier for electrode, resulting superior sodium storage terms capability life, outperforms those NaBF 4 /diglyme. Importantly, offers valuable insights optimizing behaviors materials by group electrolyte.

Language: Английский

Citations

12