Design of pyrite/carbon nanospheres as high-capacity cathode for lithium-ion batteries

Xiong, Qinqin; Teng, Xiaojing; Lou, Jingjing; Pan, Guoxiang; Xia, Xinhui; Chi, Hongzhong; Lü, Xiaoxiao; Yang, Tao; Ji, Zhenguo

doi:10.1016/j.jechem.2019.02.005

Cited by 28 publications

(6 citation statements)

References 42 publications

(47 reference statements)

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“…The intersection point of the Nyquist plot and the real axis indicates the electrolyte resistance. The diameter of the compressed semicircle indicates the charge transfer impedance ( R ct ), which is associated with the migration capability of Li + ions at the electrode/electrolyte interface. − The straight line indicates the Warburg impedance ( Z w ) of Li + ion diffusion in the bulk of active materials. − Before cycling, the semicircle diameter of FeS x @SC-3 is slightly smaller than those of FeS x @SC-1 and FeS x @SC-5. In contrast, after 50 cycles at 1 A g –1 , the semicircle diameter of FeS x @SC-5 is much smaller than those of FeS x @SC-1 and FeS x @SC-3, indicating the relatively high electrical conductivity of FeS x @SC-5.…”

Section: Results and Discussionmentioning

confidence: 99%

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Chen

Zhang

et al. 2021

Energy Fuels

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Fern leaf-like FeS2@sulfur-doped carbon (SC) composites are synthesized through a sulfuration process using fern leaf-like γ-Fe2O3@C as the raw material. The design of combining fern leaf-like FeS2 with SC layers is favorable to enhancing the electronic conductivity of FeS2 and buffering the severe volume change associated with the pulverization issue that exists in most metal sulfide-based electrodes. When the fern leaf-like FeS2@SC composite serves as an anode for lithium-ion batteries, it can deliver high first discharge capacities of 1656.6 and 1364.7 mA h g–1 at a low density of 0.1 A g–1 and a high current density of 5 A g–1. Besides, benefiting from the structural advantages, the FeS2@SC composite shows superior rate capability (442.5 mA h g–1 at 5 A g–1) and cyclability (848.9 mA h g–1 at 1 A g–1 after 300 cycles, corresponding to 89.14% of the second discharge specific capacity). The enhanced electrochemical performance of FeS2@SC can be ascribed to the synergistic effect of the hierarchical fern leaf-like FeS2 microstructure and the sulfur-doped carbon coating layer.

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Section: Results and Discussionmentioning

confidence: 99%

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Chen

Zhang

et al. 2021

Energy Fuels

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Section: Resultsmentioning

confidence: 99%

“…The SnSSe/ GR@C electrode shows a clean leachate with a little black powder attributed to the C-PAN layer covering the surface of SnSSe/GR particles that suppresses the shuttle effect and detachment (see Figure 7e and Figure S14a). 49,50 The integrated structure of SnSSe/GR@C electrode minimizes the contacting area between the active material and electrolyte, which reduces the SEI formation in the first cycle and limits it on the surface of the electrode. Moreover, a lower volume change is obtained because of the nanosize effect and sufficient buffer area, preventing the crack of the electrode that leads to the continuous SEI formation.…”

Section: Resultsmentioning

confidence: 99%

Integrated Structure of Tin-Based Anodes Enhancing High Power Density and Long Cycle Life for Lithium Ion Batteries

Chen

Weng

Meng

et al. 2020

ACS Appl. Energy Mater.

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Tin-based materials have been considered as promising anode materials due to their advantages including high specific capacity, abundant resources, and low toxicity. Unfortunately, it has remained an intractable challenge for reasonable design with improved power density and long-term cycle performance for Li ion batteries because of the huge irreversible volume change during the alloying/dealloying process. Herein, an integrated electrode is designed by in situ growing SnSSe on the graphene sheet, followed by self-assembly and multiscale coated with conductive carbonized polyacrylonitrile. Pleasantly, dynamic evolution of integrated electrode thickness during cycles is in situ monitored by dilatometer, which exhibits effectively suppression of the thickness change to a low level with great reversibility (38.2% expansion ratio) compared with the pristine SnSSe electrode (161.8% expansion ratio) in the first cycle. Moreover, the electrochemical impedance of the integrated electrode shows a great stability after 500 cycles. As a result, the integrated electrode of SnSSe/GR@C shows a great rate performance (518.4 mA h g −1 at 5.0 A g −1 ) and stable cycle life (capacities retention of 107.1% at 5.0 A g −1 after 850 cycles). This work offers an innovative strategy for the development of high-performance tin-based anodes.

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“…Enhanced lithium storage properties Ultra-small ZnFe 2 O 4 nanosphere [10] Hydrogen production and photocatalytic activity High specific surface area TiO 2 nanosphere [11] For lithium-ion batteries Pyrite/carbon nanospheres [12] For sensing trace cysteine in HeLa cells…”

Section: Quantum Dotsmentioning

confidence: 99%

The Components of Functional Nanosystems and Nanostructures

Baysal¹

2020

Smart Nanosystems for Biomedicine, Optoelectronics and Catalysis

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The science of nanosystems is used in many fields such as medicine, biomedical, biotechnology, agriculture, environmental pollution control, cosmetics, optics, health, food, energy, textiles, automotive, communication technologies, agriculture, and electronics. Nanomaterials, nanostructures, and nanosystems have recently brought the most popular and innovative approaches to our lives. This new technology is based on the production of invisible particles and the production of new materials by controlling the atomic sequence of these particles. Nanotechnological studies are based on mimicking the principle of atomic sequence in nature. Using a combination of different disciplines, it finds application in almost every field of our lives. Nanospheres, nanorobots, biosensors, quantum dots, and biochips are the main components of nanoparticles. Many new diagnostic and treatment methods are being developed nano-dimensional.

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Design of pyrite/carbon nanospheres as high-capacity cathode for lithium-ion batteries

Cited by 28 publications

References 42 publications

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Integrated Structure of Tin-Based Anodes Enhancing High Power Density and Long Cycle Life for Lithium Ion Batteries

The Components of Functional Nanosystems and Nanostructures

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Design of pyrite/carbon nanospheres as high-capacity cathode for lithium-ion batteries

Cited by 28 publications

References 42 publications

Rational Synthesis of Fern Leaf-like FeS2@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Rational Synthesis of Fern Leaf-like FeS2@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Integrated Structure of Tin-Based Anodes Enhancing High Power Density and Long Cycle Life for Lithium Ion Batteries

The Components of Functional Nanosystems and Nanostructures

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Product

Resources

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Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries

Rational Synthesis of Fern Leaf-like FeS₂@Sulfur-Doped Carbon as an Anode for Superior Lithium-Ion Batteries