Self-templated anchor of FeS2 nanoparticles on porous carbon matrix as highly reversible K-storage anode

Shen, Nailu; Chen, Ningning; Pang, Yinshuang; Zang, Shenluo; Hu, Chi; Tang, Zeming; Lai, Qingxue; Zheng, Jing; Liang, Yanyu

doi:10.1016/j.apsusc.2022.155153

Cited by 7 publications

(5 citation statements)

References 43 publications

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“…However, these two peaks disappear in the subsequent CV cycles, proving that this process is irreversible. In addition, another cathode peak appears at ∼1.0 V in the first cycle, which can be found not only in NTCDA but also in Fe‐NTCDA, corresponding to the decomposition of electrolytes and the formation of solid electrolyte interphase (SEI) film [41] . In the subsequent CV curves, a pair of reversible redox couples (∼0.70/∼0.38 V) can be observed in the NTCDA anode.…”

Section: Resultsmentioning

confidence: 93%

“…In addition, another cathode peak appears at ~1.0 V in the first cycle, which can be found not only in NTCDA but also in Fe-NTCDA, corresponding to the decomposition of electrolytes and the formation of solid electrolyte interphase (SEI) film. [41] In the subsequent CV curves, a pair of reversible redox couples (~0.70/ ~0.38 V) can be observed in the NTCDA anode. This implies that the reaction of K + with the C=O group.…”

Section: Chemistry-a European Journalmentioning

confidence: 95%

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Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Shen

Chen

Lai

et al. 2023

Chemistry A European J

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Given these advantages of widely designable structures and environmentally friendly characteristics, organic electrode materials (OEMs) are considered to be promising electrode materials for alkaline metal-ion batteries. However, their large-scale application is hampered by insufficient specific capacity and rate performance. Here, Fe 2 + is coupled to the anhydride molecule NTCDA to form a novel K-storage anode Fe-NTCDA. In this way, the working potential of Fe-NTCDA anode is reduced, which makes it more suitable to be used as an anode material. Meanwhile, the electrochemical performance is significantly improved due to the increase in K-storage sites. Moreover, electrolytes regulation is implemented to optimize the K-storage behavior, resulting into a high specific capacity of 167 mAh/g after 100 cycles at 50 mA/g and 114 mAh/g even at 500 mA/g in the 3 M KFSI/ DME electrolytes.

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Section: Resultsmentioning

confidence: 93%

Section: Chemistry-a European Journalmentioning

confidence: 95%

Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Shen

Chen

Lai

et al. 2023

Chemistry A European J

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“…In the high‐resolution Fe 2p spectrum (Figure 2i), two peaks located at 707.5 and 720.3 eV can be assigned to the 2p 3/2 and 2p 1/2 states of Fe 2+ , respectively. [ 38,39 ] The peaks at 162.9 and 164.1 eV in the S 2p spectrum (Figure 2j) are the characteristics of S 2 2− 2p 3/2 and S 2p 1/2 , respectively. [ 20 ] The results further confirmed the high purity of FeS 2 nanosheet arrays.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Coupling of Sulfide Electrolyte and Integrated 3D FeS₂ Electrode Toward Long‐Cycling All‐Solid‐State Lithium Batteries

Liu,

Zhao,

et al. 2024

Energy & Environ Materials

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FeS2 cathode is promising for all‐solid‐state lithium batteries due to its ultra‐high capacity, low cost, and environmental friendliness. However, the poor performances, induced by limited electrode‐electrolyte interface, severe volume expansion, and polysulfide shuttle, hinder the application of FeS2 in all‐solid‐state lithium batteries. Herein, an integrated 3D FeS2 electrode with full infiltration of Li6PS5Cl sulfide electrolytes is designed to address these challenges. Such a 3D integrated design not only achieves intimate and maximized interfacial contact between electrode and sulfide electrolytes, but also effectively buffers the inner volume change of FeS2 and completely eliminates the polysulfide shuttle through direct solid–solid conversion of Li2S/S. Besides, the vertical 3D arrays guarantee direct electron transport channels and horizontally shortened ion diffusion paths, endowing the integrated electrode with a remarkably reduced interfacial impedance and enhanced reaction kinetics. Benefiting from these synergies, the integrated all‐solid‐state lithium battery exhibits the largest reversible capacity (667 mAh g−1), best rate performance, and highest capacity retention of 82% over 500 cycles at 0.1 C compared to both a liquid battery and non‐integrated all‐solid‐state lithium battery. The cycling performance is among the best reported for FeS2‐based all‐solid‐state lithium batteries. This work presents an innovative synergistic strategy for designing long‐cycling high‐energy all‐solid‐state lithium batteries, which can be readily applied to other battery systems, such as lithium‐sulfur batteries.

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“…P-HC is a type IV isotherm with a specific surface area of 286.0 m 2 /g and a pore volume of 0.840 cm 3 /g. 31 Furthermore, a suitable pore structure is known to promote rapid K + transfer and buffer the volume expansion. 32 However, the evident difference is that B-HC has a substantially lower specific surface area and pore volume than P-HC, which are 1.3 m 2 /g and 0.003 cm 3 /g, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The specific surface area and porous size of B-HC and P-HC are investigated by using the N 2 adsorption–desorption isotherms (Figure b,c). P-HC is a type IV isotherm with a specific surface area of 286.0 m 2 /g and a pore volume of 0.840 cm 3 /g . Furthermore, a suitable pore structure is known to promote rapid K + transfer and buffer the volume expansion .…”

Section: Resultsmentioning

confidence: 99%

Hard Carbon Anode Synthesized by an In Situ Porous Strategy for Advanced Potassium-Ion Batteries

Shen,

Lai,

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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As the next-generation renewable energy-storage technology at the grid scale, potassium-ion batteries demonstrate huge advantages when carbonaceous materials are adopted as K-storage anodes due to their low cost, environmental friendliness, and broad theoretical and practical basis in lithium-ion batteries. However, such kinds of anode materials still suffer from low capacity and severe volume change during the K-storage process. Herein, an approach based on a molecular-scale in situ porous design is proposed to develop carbonaceous electrodes with uniform pores and defective structures. K+ could move rapidly in the bulk electrode along with mitigated volume expansion owing to the abundant channel structure. Moreover, the discharge capacity of the porous hard carbon electrode increases significantly because of the defect structure in the carbon layer. As a consequence, the developed porous hard carbon electrode can maintain a high capacity of 151.9 mAh/g after 2500 cycles at 1 A/g with an average capacity decay rate per cycle of just 0.008%. These excellent K-storage properties can be attributed to the molecular-scale-derived porous structure and defects with increased carbon layer spacing.

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Self-templated anchor of FeS2 nanoparticles on porous carbon matrix as highly reversible K-storage anode

Cited by 7 publications

References 43 publications

Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Synergistic Coupling of Sulfide Electrolyte and Integrated 3D FeS₂ Electrode Toward Long‐Cycling All‐Solid‐State Lithium Batteries

Hard Carbon Anode Synthesized by an In Situ Porous Strategy for Advanced Potassium-Ion Batteries

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Self-templated anchor of FeS2 nanoparticles on porous carbon matrix as highly reversible K-storage anode

Cited by 7 publications

References 43 publications

Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes

Synergistic Coupling of Sulfide Electrolyte and Integrated 3D FeS2 Electrode Toward Long‐Cycling All‐Solid‐State Lithium Batteries

Hard Carbon Anode Synthesized by an In Situ Porous Strategy for Advanced Potassium-Ion Batteries

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Synergistic Coupling of Sulfide Electrolyte and Integrated 3D FeS₂ Electrode Toward Long‐Cycling All‐Solid‐State Lithium Batteries