Synthesis of Nanoflakes-like Bi2Se3@rGO composite and study on electrochemistry properties for high performance as the anode in lithium ion batteries

Moon, Joon Ha; Seong, Honggyu; Kim, Geongil; Jin, Youngho; Nam, Wonbin; Yoo, Han‐Ill; Jung, Tymoteusz; Lee, Kyounghoon; Yang, MinHo; Cho, Se Youn; Choi, Jaewon

doi:10.1016/j.apsusc.2023.157976

“…However, further improvements in their rate capability are still necessary to meet practical demands. 12,13 Among various MT materials, Bi 2 Te 3 possesses a layered structure similar to graphite and demonstrates adequate theoretical capacity through a combination of conversion and alloying reactions. 14,15 Nevertheless, the main obstacle related to Bi 2 Te 3 is its significant alteration in volume while cycling, resulting in the pulverization of the electrode substance and a rapid decline in capacity.…”

Section: Introductionmentioning

confidence: 99%

Nanoconfinement of ultra-small Bi₂Te₃ nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Cheng,

Li,

Wang

et al. 2024

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Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

Huang,

Yu,

Yue Zhang

et al. 2025

Angewandte Chemie

0

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Lithium‐sulfur batteries (LSBs) are among the most promising next‐generation energy storage technologies. However, a slow Li‐S reaction kinetics at the LSB cathode limit their energy and power densities. To address these challenges, this study introduces an anionic‐doped transition metal chalcogenide as an effective catalyst to accelerate the Li‐S reaction. Specifically, a tellurium‐doped, carbon‐supported bismuth selenide with Se vacancies (Te‐Bi2Se3‐x@C) is prepared and tested as a sulfur host in LSB cathodes. X‐ray absorption and in‐situ X‐ray diffraction analyses reveal that Te doping induces lattice distortions and modulates the local coordination environment and electronic structure of Bi atoms to promote the catalytic activity toward the conversion of polysulfides. Additionally, the generated Se vacancies alter the electronic structure around atomic defect sites, increase the carrier concentration, and activate unpaired cations to effectively trap polysulfides. As a result, LSBs based on Te‐Bi2Se3‐x@C/S cathodes demonstrate outstanding specific capacities of 1508 mAh·g‐1 at 0.1C, excellent rate performance with 655 mAh·g‐1 at 5C, and near‐integral cycle stability over 1000 cycles. Furthermore, under high sulfur loading of 6.4 mg·cm‐2, a cathode capacity exceeding 8 mAh·cm‐2 is sustained at 0.1C current rate, with 6.4 mAh·cm‐2 retained after 300 cycles under lean electrolyte conditions (6.8 μL·mg‐1).

show abstract

Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

Huang,

Yu,

Yue Zhang

et al. 2025

Angew Chem Int Ed

0

View full text Add to dashboard Cite

Lithium‐sulfur batteries (LSBs) are among the most promising next‐generation energy storage technologies. However, a slow Li‐S reaction kinetics at the LSB cathode limit their energy and power densities. To address these challenges, this study introduces an anionic‐doped transition metal chalcogenide as an effective catalyst to accelerate the Li‐S reaction. Specifically, a tellurium‐doped, carbon‐supported bismuth selenide with Se vacancies (Te‐Bi2Se3‐x@C) is prepared and tested as a sulfur host in LSB cathodes. X‐ray absorption and in‐situ X‐ray diffraction analyses reveal that Te doping induces lattice distortions and modulates the local coordination environment and electronic structure of Bi atoms to promote the catalytic activity toward the conversion of polysulfides. Additionally, the generated Se vacancies alter the electronic structure around atomic defect sites, increase the carrier concentration, and activate unpaired cations to effectively trap polysulfides. As a result, LSBs based on Te‐Bi2Se3‐x@C/S cathodes demonstrate outstanding specific capacities of 1508 mAh·g‐1 at 0.1C, excellent rate performance with 655 mAh·g‐1 at 5C, and near‐integral cycle stability over 1000 cycles. Furthermore, under high sulfur loading of 6.4 mg·cm‐2, a cathode capacity exceeding 8 mAh·cm‐2 is sustained at 0.1C current rate, with 6.4 mAh·cm‐2 retained after 300 cycles under lean electrolyte conditions (6.8 μL·mg‐1).

show abstract

Synthesis of Nanoflakes-like Bi2Se3@rGO composite and study on electrochemistry properties for high performance as the anode in lithium ion batteries

Cited by 13 publications

References 50 publications

Nanoconfinement of ultra-small Bi₂Te₃ nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Nanoconfinement of ultra-small Bi₂Te₃ nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

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Synthesis of Nanoflakes-like Bi2Se3@rGO composite and study on electrochemistry properties for high performance as the anode in lithium ion batteries

Cited by 13 publications

References 50 publications

Nanoconfinement of ultra-small Bi2Te3 nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Nanoconfinement of ultra-small Bi2Te3 nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

Anionic Doping in Layered Transition Metal Chalcogenides for Robust Lithium‐Sulfur Batteries

Contact Info

Product

Resources

About

Nanoconfinement of ultra-small Bi₂Te₃ nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes

Nanoconfinement of ultra-small Bi₂Te₃ nanocrystals on reduced graphene oxide: a pathway to high-performance sodium-ion battery anodes