Uniform implantation of ultrafine Cu2S nanoparticles into carbon nanowires for efficient potassium-ion battery anodes

Zhu, Chuannan; Zhao, Xuwen; Xu, Yifan; Duan, Liping; Tian, Ruiqi; Liao, Jiaying; Zhou, Xiaosi

doi:10.1007/s40843-022-2430-6

“…In addition, the FCNC-500 electrode exposed higher b-values calculated from CV curves and a higher portion of surface-controlled capacity than the CNC electrode (Figure 3f-g and Figure S17-S18). [31] The more dominated capacitive contributions were derived from the enriched porous structure and facilitated ion/electron transfer owing to the regulated fluorination strategy, leading to the advanced rate performance of the FCNC-500 electrode. In the in situ XRD spectra of the FCNC-500 electrode, the typical insertion reaction, and conversion reaction were convinced because lattice planes of NiS 2 (220) and (210) disappeared and KNiS 2 (004) emerged.…”

Section: Methodsmentioning

confidence: 99%

Fluorinated Surface Engineering Towards High‐Rate and Durable Potassium‐Ion Battery

Zhang,

Wu,

Fang

et al. 2024

Angew Chem Int Ed

0

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Solid electrolyte interphase (SEI) crucially affects the rate performance and cycling lifespan, yet to date more extensive research is still needed in potassium‐ion batteries. We report an ultra‐thin and KF‐enriched SEI triggered by tuned fluorinated surface design in electrode. Our results reveal that fluorination engineering alters the interfacial chemical environment to facilitate inherited electronic conductivity, enhance adsorption ability of potassium, induce localized surface polarization to guide electrolyte decomposition behavior for SEI formation, and especially, enrich the KF crystals in SEI by self‐sacrifice from C‐F bond cleavage. Hence, the regulated fluorinated electrode with generated ultra‐thin, uniform, and KF‐enriched SEI shows improved capacity of 439.3 mAh g‐1 (3.82 mAh cm‐2), boosted rate performance (202.3 mAh g‐1 at 8.70 mA cm‐2) and durable cycling performance (even under high loading of ~8.7 mg cm‐2). We expect this practical engineering principle to open up new opportunities for upgrading the development of potassium‐ion batteries.

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Role of Ether‐Based Electrolytes in Enhancing Potential of Potassium‐ion Batteries

Jo,

Myung

2024

Advanced Energy Materials

2

0

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Potassium‐ion batteries are a promising advancement in secondary batteries, offering the potential to surpass even sodium‐ion batteries in replacing lithium‐ion batteries. Although the technology has the potential for high energy density, unresolved technical difficulties pose a challenge. Fortunately, progress is made in improving electrode materials, with studies demonstrating that controlling the fundamental cause of electrolyte degradation can significantly enhance the performance of potassium‐ion batteries. However, the ability of ether‐based electrolytes to improve battery performance is overlooked despite their inherent characteristics. This work explores the role and principles of ether‐based electrolytes in enhancing the potential of potassium‐ion batteries, highlighting various controversies and prospects in this area arising from insufficient research.

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Fluorinated Surface Engineering Towards High‐Rate and Durable Potassium‐Ion Battery

Zhang,

Wu,

Fang

et al. 2024

Angewandte Chemie

0

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Solid electrolyte interphase (SEI) crucially affects the rate performance and cycling lifespan, yet to date more extensive research is still needed in potassium‐ion batteries. We report an ultra‐thin and KF‐enriched SEI triggered by tuned fluorinated surface design in electrode. Our results reveal that fluorination engineering alters the interfacial chemical environment to facilitate inherited electronic conductivity, enhance adsorption ability of potassium, induce localized surface polarization to guide electrolyte decomposition behavior for SEI formation, and especially, enrich the KF crystals in SEI by self‐sacrifice from C‐F bond cleavage. Hence, the regulated fluorinated electrode with generated ultra‐thin, uniform, and KF‐enriched SEI shows improved capacity of 439.3 mAh g‐1 (3.82 mAh cm‐2), boosted rate performance (202.3 mAh g‐1 at 8.70 mA cm‐2) and durable cycling performance (even under high loading of ~8.7 mg cm‐2). We expect this practical engineering principle to open up new opportunities for upgrading the development of potassium‐ion batteries.

show abstract

Uniform implantation of ultrafine Cu2S nanoparticles into carbon nanowires for efficient potassium-ion battery anodes

Cited by 7 publications

References 44 publications

Fluorinated Surface Engineering Towards High‐Rate and Durable Potassium‐Ion Battery

Fluorinated Surface Engineering Towards High‐Rate and Durable Potassium‐Ion Battery

Role of Ether‐Based Electrolytes in Enhancing Potential of Potassium‐ion Batteries

Fluorinated Surface Engineering Towards High‐Rate and Durable Potassium‐Ion Battery

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