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Summary: Amorphous carbons with high heteroatom doping were prepared from renewable lignin biomacromolecule precursors. The nitrogen/sulfur co-doped lignin-derived porous carbons exhibited abundant defective active sites, resulting in high reversible capacity and cycling stability. The potassium-ion hybrid capacitors assembled with NSLPC anodes showed excellent cycling stability and high energy density.
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Summary: This study presents the design of expanded graphite cohered by N, B bridge-doping carbon patches (NBEG) as an efficient anode for potassium-ion batteries (KIBs). The co-doping of B plays a crucial role in maximizing the doping-site utilization of N atoms, balancing the adsorption-diffusion kinetics, and promoting charge transfer. The designed NBEG exhibits a robust lamellar structure, suitable interlayer distance, and rich active sites, enabling rapid ion/electron transfer and high K-ion storage capacity.
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(2023)
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Huanyu Liang et al.
Summary: Researchers have synthesized boron-doped carbon nanobubbles (BCNBs) using a template method, which improves the conductivity of the carbon structure and enhances the intercalation-controlled and capacitive-controlled capacities of potassium-ion batteries (PIBs). Theoretical calculations confirm that boron doping effectively enhances conductivity and electrochemical reversibility in PIBs. The designed BCNBs anode exhibits high specific capacity, excellent rate performance, and considerable capacity retention. Additionally, the strategy of pre-forming a stable artificial inorganic solid electrolyte interface enables high initial coulombic efficiency for BCNBs. This work demonstrates the potential of heteroatom-doping strategy to enhance potassium-ion storage and pave the way for high-energy/power storage devices.
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Jian Yin et al.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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Ge Song et al.
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ACS ENERGY LETTERS
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Lei Zhong et al.
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Quanzhou Du et al.
Summary: Nitrogen-doped porous carbon nanosheets (NPCNs) with unique structure were studied for their potential application as anode and cathode material in potassium-ion hybrid capacitors (PIHCs). The structural changes of NPCNs during potassiation and depotassiation were analyzed using Raman spectroscopy and transmission electron microscopy. The PIHC device assembled with NPCNs exhibited a superior energy density of 128 Wh kg-1 and a capacity retention of 90.8% after 9000 cycles. This research contributes to the development of double-functional self-matching materials for high-performance hybrid energy storage devices.
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Daping Qiu et al.
Summary: Potassium-ion batteries (PIBs) are potential candidates for Beyond Li-ion Batteries due to their resource advantage and low standard electrode potential. The research on PIBs is in its early stages, and the development of high-performance electrode materials and understanding their potassium storage mechanism are the most urgent tasks.
GREEN ENERGY & ENVIRONMENT
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Review
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Xiaoxu Liu et al.
Summary: This review discusses the key structural factors affecting potassium storage in LCMs, establishes a structure-property database, and systematically analyzes the effects of structural parameters on potassium storage properties. It provides a foundation for future exploration and applications in the field.
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Lei Yang et al.
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Jiafeng Ruan et al.
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Honghui Bi et al.
Summary: In this study, N/S co-doped carbon nanocapsule (NSCN) was developed for superior potassium ion storage in batteries. The NSCN electrode exhibited high reversible capacity, outstanding rate capability, and favorable cycle stability, providing inspiration for the optimization of energy storage materials through structure and doping engineering.
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Fei Yuan et al.
Summary: This review starts from the fundamental understanding of the two-phase interface and analyzes the effect of different improvement strategies on it. Researches on the two-phase interface have made progress but also face challenges. This review provides guidance for developing other advanced anodes.
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Summary: This study demonstrates that heteroatom doping can effectively modify the crystal structure stability, charge/ion state, and bandgap of active materials, thus modulating the kinetics of electrode materials and enhancing the electron and K+ ion transfer in Ni-doped CoSe2 embedded in carbon nanocomposites.
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Mingquan Liu et al.
Summary: This article summarizes the recent progress in carbon anode materials for sodium-ion/potassium-ion batteries (SIBs/PIBs) and compares the fabrication and characteristics of different carbon allotropes. The article also discusses the ion storage mechanisms, interfacial chemistries, and their relationship to performance and material optimization strategies. Finally, the critical challenges and future developments for carbon anodes in practical applications of SIBs/PIBs are proposed.
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Yamin Zhang et al.
Summary: This article reviews the research progress of carbon-based anode materials in potassium ion batteries (PIBs), discussing the unique characteristics of carbon as a competitive anode and summarizing the various carbon materials used as anodes in PIBs. The article also proposes the future development and perspective of advanced carbon materials for next-generation PIBs.
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Ping Niu et al.
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Na Cheng et al.
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NANO-MICRO LETTERS
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Fei Yuan et al.
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Lei Yang et al.
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Yuxiang Chen et al.
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Ling-Fei Zhao et al.
Summary: Hard carbon is recognized as a promising anode material for alkali metal-ion batteries, particularly showing outstanding performance in sodium-ion batteries, with in-depth research and commercial prototype demonstration. Challenges and research perspectives for future development and early commercialization of HC-based sodium-ion batteries are also discussed comprehensively.
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