Preparation of Fe3O4/FexSy heterostructures via electrochemical deposition method and their enhanced electrochemical performance for lithium-sulfur batteries

Li, Xin; Shao, Chenglong; Wang, Xinlu; Wang, Jinjin; Liu, Guixia; Yu, Wensheng; Dong, Xiangting; Wang, Jinxian

doi:10.1016/j.cej.2022.137267

Cited by 17 publications

(3 citation statements)

References 33 publications

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“…A 5 mM Li 2 S 4 solution was prepared according to literature. [ 38 ] Specifically, the solution was prepared using Li 2 S with a molar ratio of 5:1 dissolved in 1:1 (v/v)/v DOL and DME solvents. Then, 20 mg HPOC and 1T‐WS 2 @HPOC composites were added to two bottles containing Li 2 S 4 (5 × 10 −3 M 5 mL) solution.…”

Section: Methodsmentioning

confidence: 99%

1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

Zeng,

Tang,

Luo

et al. 2023

Adv Eng Mater

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The sluggish sulfur reaction kinetics and fast capacity attenuation still pose great challenges to lithium‐sulfur (Li–S) batteries. In this work, tubular carbonl (HPOC) was obtained by carbonization of the Cattail fiber. 1T‐WS2@HPOC was prepared by solvothermal method, and their sulfur composite, 1T‐WS2@HPOC/S and HPOC/S as sulfur host composite, are obtained by sulfur melting. The composite materials were characterized by scanning electron microscopy, X‐ray diffraction, thermogravimetry, and X‐ray photoelectron spectroscopy etc. Results showed that 1T‐WS2 grew uniformly on the HPOC substrate and had abundant active sites, which could effectively improve the physicochemical adsorption capacity of S‐fixation (76 wt%) and polysulfide. Battery assembly and electrochemical performance tests were conducted for the HPOC/S and 1T‐WS2@HPOC/S composites. Results showed that the initial discharge capacity of the 1T‐WS2@HPOC/S positive electrode is 1272 mAh/g at 0.1 C, higher than the HPOC/S positive electrode (1025 mAh/g). 1T‐WS2@HPOC/S maintains a discharge capacity of 695 mAh/g after 500 cycles at 0.5 C, with a capacity decay rate of only 0.054% per cycle. With a discharge capacity of 504 mAh/g after 400 cycles at 1C, the Coulomb efficiency is 98.9%. The 1T‐WS2@HPOC/S composites with unique structure and excellent electrochemical performance have broad application prospects in the field of Li–S batteries.This article is protected by copyright. All rights reserved.

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Section: Methodsmentioning

confidence: 99%

1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

Zeng,

Tang,

Luo

et al. 2023

Adv Eng Mater

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“…With the rapid development of the new energy industry, various types of new secondary batteries have been widely studied. − Among these, lithium–sulfur (Li–S) batteries, as a high energy density (2600 Wh kg –1 ) battery, have triggered a wide range of research. − As a multielectron transfer reaction, sulfur cathode is capable of releasing a high discharge specific capacity of 1675 mAh g –1 under ideal conditions, and at the same time, lithium–sulfur batteries combine the advantages of low cost and environmental friendliness. − However, the commercial application of lithium–sulfur batteries still faces a series of challenges. − The poor electrical conductivity of the active substance sulfur (S) and the final discharge product lithium sulfide (Li 2 S), the huge volume expansion during charging and discharging due to the different densities of S and Li 2 S, as well as the shuttle effect due to the dissolution of soluble intermediate lithium polysulfides (LiPSs) during the reaction process have seriously hindered the commercialization of lithium–sulfur batteries. − …”

Section: Introductionmentioning

confidence: 99%

Hollow Defect-Rich Nanofibers as Sulfur Hosts for Lithium–Sulfur Batteries

Hong,

Li,

et al. 2024

ACS Appl. Mater. Interfaces

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The slow redox kinetics of lithium−sulfur batteries severely limit their application, and sulfur utilization can be effectively enhanced by designing different cathode sulfur host materials. Herein, we report the hollow porous nanofiber LaNi 0.6 Co 0.4 O 3 as a bidirectional host material for lithium−sulfur batteries. After Co is substituted into LaNiO 3 , oxygen vacancies are generated to enhance the material conductivity and enrich the active sites of the material, and the electrochemical reaction rate can be further accelerated by the synergistic catalytic ability of Ni and Co elements in the B-site of the active site of LaNi 0.6 Co 0.4 O 3 . As illustrated by the kinetic test results, LaNi 0.6 Co 0.4 O 3 effectively accelerated the interconversion of lithium polysulfides, and the nucleation of Li 2 S and the dissolution rate of Li 2 S were significantly enhanced, indicating that LaNi 0.6 Co 0.4 O 3 accelerated the redox kinetics of the lithium−sulfur battery during the charging and discharging process. In the electrochemical performance test, the initial discharge specific capacity of S/LaNi 0.6 Co 0.4 O 3 was 1140.4 mAh g −1 at 0.1 C, and it was able to release a discharge specific capacity of 584.2 mAh g −1 at a rate of 5 C. It also showed excellent cycling ability in the long cycle test, with a single-cycle capacity degradation rate of only 0.08%. Even under the harsh conditions of high loaded sulfur and low electrolyte dosage, S/LaNi 0.6 Co 0.4 O 3 still delivers excellent specific capacity and excellent cycling capability. Therefore, this study provides an idea for the future development of bidirectional high-activity electrocatalysts for lithium−sulfur batteries.

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“…Moreover, Fe 3 O 4 is a more desirable material for energy storage applications because of its exceptional properties, such as its high storage capacity (928 mA h g −1 ), accessibility, low-cost, and eco-friendliness. 13–15 However, the electrochemical performance of Fe 3 O 4 composites, especially their cyclic performance at high currents, has proven to be inadequate due to poor conductivity, severe constituent agglomeration, and structural uncertainty. Consequently, this deficiency can be solved by tailoring the surface architecture of Fe 3 O 4 composites and incorporating conductive agents, such as graphene, activated carbon, carbon nanotubes, etc.…”

Section: Introductionmentioning

confidence: 99%

Graphene based magnetite carbon nanofiber composites as anodes for high-performance Li-ion batteries

Rosaiah¹,

Niyitanga

Sambasivam

et al. 2023

New J. Chem.

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Preparation of Fe3O4/FexSy heterostructures via electrochemical deposition method and their enhanced electrochemical performance for lithium-sulfur batteries

Cited by 17 publications

References 33 publications

1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

Hollow Defect-Rich Nanofibers as Sulfur Hosts for Lithium–Sulfur Batteries

Graphene based magnetite carbon nanofiber composites as anodes for high-performance Li-ion batteries

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Preparation of Fe3O4/FexSy heterostructures via electrochemical deposition method and their enhanced electrochemical performance for lithium-sulfur batteries

Cited by 17 publications

References 33 publications

1T‐WS2 Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

1T‐WS2 Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

Hollow Defect-Rich Nanofibers as Sulfur Hosts for Lithium–Sulfur Batteries

Graphene based magnetite carbon nanofiber composites as anodes for high-performance Li-ion batteries

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1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries

1T‐WS₂ Nanosheet‐Modified Biomass Carbon as Sulfur Host for High‐Performance Lithium–Sulfur Batteries