Rational design of ZnS/CoS heterostructures in three dimensional N-doped CNTs for superior lithium storage

Cao, Meng; Liao, Fang; Wang, Qingqing; Luo, Wanshu; Ma, Yinglan; Zheng, Xinshi; Wang, Ying; Zhang, Lei

doi:10.1016/j.jallcom.2020.157867

Cited by 21 publications

(9 citation statements)

References 31 publications

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“…01-089-2155). 13,19 Due to the C peak being much stronger and the loading samples on the CC being less, compared with ZnS/ CoS 2 , the diffraction peaks of ZnS/CoS 2 /CC and CoS 2 /CC are not so obvious.…”

Section: Resultssupporting

confidence: 83%

“…00-041-1471) , and the three weaker characteristic peaks at 50.8, 38.0, and 26.8° are attributed to the (118), (1011), and (103) crystal planes of ZnS (JCPDS No. 01-089-2155). , Due to the C peak being much stronger and the loading samples on the CC being less, compared with ZnS/CoS 2 , the diffraction peaks of ZnS/CoS 2 /CC and CoS 2 /CC are not so obvious.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…However, powdered TMS nanoparticles always inevitably aggregate during charge/discharge cycles, which leads to low utilization of active material and also hinders electron transport. 13 Since carbon materials (e.g., carbon nanotubes, carbon nanofibers, graphene, carbon cloth, etc.) have good conductivity as well as cyclic stability as electrodes, confining TMS to carbon matrices is one of the more popular and proven strategies for solving these problems.…”

Section: Introductionmentioning

confidence: 99%

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Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Yang

Zhao

et al. 2022

ACS Appl. Energy Mater.

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The anode electrochemical performance of lithium-ion batteries (LIBs) depends mainly on the structural stability of the electrode material and its conductivity, and its energy storage mechanism is mainly derived from the Faraday charge transfer that occurs around the electrode surface and the Faraday pseudocapacitance. Due to the high theoretical specific capacity of transition metal sulfides (TMS) and the mechanical stability and high conductivity of carbon cloth (CC), the strategy of growing TMS in situ in CC can simultaneously improve reversibility, structural stability, and conductivity. In this work, hierarchical 3D-Zn-ZIF-on-2D-Co-ZIF precursors are grown in situ on CC by a strategy called MOF-on-MOF, and the ZnS/CoS2/CC stable framework is obtained by sulfuration. The interfacial electron transfer mechanism was explored by ultraviolet photoelectron spectroscopy, and the synergistic interaction between ZnS and CoS2 in ZnS/CoS2/CC was further elaborated. Specifically, the work functions of ZnS and CoS2 are 15.9 and 16.6 eV, respectively, and the corresponding Fermi energy levels are 5.32 eV for ZnS and 4.62 eV for CoS2. Therefore, after doping with ZnS, electrons will be transferred and enriched from the ZnS surface to the CoS2 surface to accelerate the reduction process of CoS2, and this plays such a decisive part during the electrochemical reaction. Thereby, the charge enrichment and rapid transfer at the ZnS/CoS2/CC interface facilitates the Faraday reaction. As a result, ZnS/CoS2/CC exhibits an outstanding electrochemical performance as an anode material for LIBs, with a capacity of up to 1644.7 mA h g–1 after 160 cycles at a high current density of 1 A g–1.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Yang

Zhao

et al. 2022

ACS Appl. Energy Mater.

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“…And 284.8 eV corresponds to the C−N bond in which the N element is derived from urotropine. 20,22,23 The peaks at 289.8 and 284.4 eV correspond to C�O and C−C bonds, respectively. The spectrum of S 2p is shown in Figure 6e, in which three distinct characteristic peaks at 161.1, 167.2, and 162.5 eV correspond to the S−C bond, S oxide, and S 2− ion, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Evaluation of Co-Doped Fe₇S₈/C Composites for Lithium Storage

Huang

Wang

et al. 2023

Inorg. Chem.

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Fe7S8 has a high theoretical capacity (663 mAh g–1) and can be prepared at a low cost, making it advantageous for production. However, Fe7S8 has two disadvantages as a lithium-ion battery anode material. The first is that the conductivity of Fe7S8 is not good. The second is that when the lithium ion is embedded, the volume expansion of the Fe7S8 electrode is serious. That is why Fe7S8 has not been used in real life yet. In this paper, Co-Fe7S8/C composites were prepared by doping Co into Fe7S8 through a one-pot simple hydrothermal method. In situ Co is doped into Fe7S8 to produce a more disordered microstructure to improve ion and electron transport performance, thereby reducing the activation barrier of the main material. The Co-Fe7S8/C electrode presents a high specific discharge capacity of 1586 mAh g–1 and a Coulombic efficiency (CE) of 71.34% at an initial cycle at 0.1 A g–1. After 1500 cycles, the specific discharge capacity remains at 436 mAh g–1 (5 A g–1). When the current density returns to 0.1 A g–1, the capacity almost returns to the initial level, showing excellent rate performance.

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Phase Evolution of Multi‐Metal Dichalcogenides With Conversion‐Alloying Hybrid Mechanism for Superior Lithium Storage

Jiang,

Hu,

Zhang

et al. 2024

Advanced Materials

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Traditional lithium‐ion battery (LIB) anodes, whether intercalation‐type like graphite or alloying‐type like silicon, which employ a single lithium storage mechanism, are often limited by modest capacity or substantial volume changes. Here, we introduce the kesterite multi‐metal dichalcogenide (CZTSSe) as an anode material that harnesses a conversion‐alloying hybrid lithium storage mechanism. Results unveil that during the charge‐discharge processes, the CZTSSe undergoes a comprehensive phase evolution, transitioning from kesterite structure to multiple dominant phases of sulfides, selenides, metals, and alloys. The involvement of multi‐components facilitates electron transport and mitigates swelling stress; meanwhile, it results in the formation of abundant defects and heterojunctions, allowing for increased lithium storage active sites and reduced lithium diffusion barrier. The CZTSSe delivers a high specific capacity of up to 2266 mA h g−1 at 0.1 A g−1 while maintaining a stable output of 116 mA h g−1 after 10000 cycles at 20 A g−1. It also demonstrates remarkable low‐temperature performance, retaining 987 mA h g−1 even after 600 cycles at −40 °C. When employed in full cells, a high specific energy of 562 Wh kg−1 is achieved, rivalling many state‐of‐the‐art LIBs. This research offers valuable insights into the design of LIB electrodes leveraging multiple lithium storage mechanisms.This article is protected by copyright. All rights reserved

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Rational design of ZnS/CoS heterostructures in three dimensional N-doped CNTs for superior lithium storage

Cited by 21 publications

References 31 publications

Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Preparation and Evaluation of Co-Doped Fe₇S₈/C Composites for Lithium Storage

Phase Evolution of Multi‐Metal Dichalcogenides With Conversion‐Alloying Hybrid Mechanism for Superior Lithium Storage

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Rational design of ZnS/CoS heterostructures in three dimensional N-doped CNTs for superior lithium storage

Cited by 21 publications

References 31 publications

Regulable Electron Transfer on ZnS/CoS2/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Regulable Electron Transfer on ZnS/CoS2/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Preparation and Evaluation of Co-Doped Fe7S8/C Composites for Lithium Storage

Phase Evolution of Multi‐Metal Dichalcogenides With Conversion‐Alloying Hybrid Mechanism for Superior Lithium Storage

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Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Regulable Electron Transfer on ZnS/CoS₂/CC Prepared by an MOF-on-MOF Strategy for Robust LIB Performance

Preparation and Evaluation of Co-Doped Fe₇S₈/C Composites for Lithium Storage