In Situ Growth of Carbon Nanotubes on Iron Phosphate and Doped with Nitrogen and Selenium for Lithium–Sulfur Batteries DOI
Zhiyong Ouyang, Amy L. You,

Bai Zheng

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 6, 2024

Lithium–sulfur (Li–S) batteries have been considered as one of the effective alternative energy systems to commercial lithium-ion (LIBs) due their high theoretical density (2600 Wh kg–1), specific capacity (1675 mAh g–1), low cost, and abundant reserves sulfur. However, intrinsic challenges, such severe shuttle effect, conductivity, significant volume expansion, hinder large-scale application. In this study, a novel composite (CNT/FP-N, Se), which in situ grown with carbon nanotubes (CNTs) doped N, Se elements, has synthesized by utilizing ferric phosphate (FP) precursor. Benefitting from synergistic effects adsorption active sites CNTs catalytic N Se, effect lithium polysulfides (LPS) can be effectively inhibited, leading an enhancement Li–S when CNT/FP-N, is utilized separator modifier. The charge/discharge platforms well maintained 0.1 5 C, 617 g–1 at C acquired. Notably, initial 990.7 1 obtained, retention 711.3 after 500 cycles, corresponding loss rate only 0.056% per cycle. This work provides feasible scheme for FP application next-generation low-cost systems.

Язык: Английский

Size Effect and Interfacial Synergy Enhancement of 2D Ultrathin CoxZn1−x‐MOF/rGO for Boosting Lithium–Sulfur Battery Performance DOI Open Access
Yutao Dong,

Ziqian Jin,

Huaiqi Peng

и другие.

Small, Год журнала: 2025, Номер 21(11)

Опубликована: Фев. 3, 2025

Abstract Advanced cathode materials are developed to tackle the challenges of polysulfide shuttle effect and slow sulfur redox kinetics in Li–S batteries. A particularly effective strategy is creation nanostructured sulfur‐host, which boast high levels conductivity catalytic activity. Here, a series ultrathin cobalt–zinc bimetallic MOFs with varying ratios synthesized on rGO via one‐pot hydrothermal process. Furthermore, graphene's specific surface area enhances electrical structural integrity, thereby promoting growth 2D synergistically optimizing contact conversion kinetics. The Co x Zn 1‐x ‐MOF/rGO has disordered structure, resulting from fine‐tuned ratio cobalt zinc centers, generates active sites modulates electronic properties, enhancing LiPSs adsorption catalysis serve as hosts. Among composites, 0.75 0.25 demonstrated exceptional activity, capacity 649.69 mA h g −1 after 250th cycle an E/S 12.56 µL mg at 0.2 C. This work deepens insights into controlled design defective MOFs, modulating their structure‐activity correlations, expected facilitate integration carbonaceous advancing development

Язык: Английский

Процитировано

1
A CoS2-loaded N-doped ultrathin-wall mesoporous carbon with three-dimensional fluffy network structure as desirable sulfur-loading host for lithium-sulfur battery DOI

Tiantian Bi,

Jinfeng Zhang, Jiaqi Li

и другие.

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179386 - 179386

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1
Alloying Strategy Balances the Adsorption‐Reduction‐Oxidation Process of Sulfur Species Across Wide Temperature Ranges DOI Open Access
Wanqi Zhang,

Mengyao Xu,

Yongqian He

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 28, 2025

Abstract Transition metal‐based catalysts have been demonstrated to effectively anchor and utilize lithium polysulfides (LiPSs), thereby enhancing the capacity of lithium‐sulfur batteries (LSBs). However, immobilized d ‐band electronic structure a single transition metal is inadequate for achieving satisfactory adsorption catalytic conversion. In this study, an alloying strategy employed modulate with aim optimal LiPSs. For purpose, cobalt (Co)‐nickel (Ni) encapsulated in nitrogen‐doped carbon nanotubes as bimetallic (CoNi/NCNT) are synthesized. The theory calculations experimental analysis demonstrate that by hybridizing ‐orbitals Co Ni, CoNi modulated be at central position. This configuration leads moderate detachment LiPSs on surface catalysts, balancing “adsorption‐reduction‐oxidation” process sulfur (S) species. Therefore, LSBs CoNi/NCNT separator able achieve good cycling room temperature (capacity decay rate 0.086% after 500 cycles 0.5 C). modified can excellent performance across wide range 0.057% 100 0 °C, 0.34% 60 °C).

Язык: Английский

Процитировано

0
Preparation and properties of carbon-modified Ni-CNT@C applied to high-performance lithium-sulfur battery DOI
Rui Wang,

Changshuai Sun,

Aoxiang Guo

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер unknown, С. 176487 - 176487

Опубликована: Сен. 1, 2024

Язык: Английский

Процитировано

1
In Situ Growth of Carbon Nanotubes on Iron Phosphate and Doped with Nitrogen and Selenium for Lithium–Sulfur Batteries DOI
Zhiyong Ouyang, Amy L. You,

Bai Zheng

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 6, 2024

Lithium–sulfur (Li–S) batteries have been considered as one of the effective alternative energy systems to commercial lithium-ion (LIBs) due their high theoretical density (2600 Wh kg–1), specific capacity (1675 mAh g–1), low cost, and abundant reserves sulfur. However, intrinsic challenges, such severe shuttle effect, conductivity, significant volume expansion, hinder large-scale application. In this study, a novel composite (CNT/FP-N, Se), which in situ grown with carbon nanotubes (CNTs) doped N, Se elements, has synthesized by utilizing ferric phosphate (FP) precursor. Benefitting from synergistic effects adsorption active sites CNTs catalytic N Se, effect lithium polysulfides (LPS) can be effectively inhibited, leading an enhancement Li–S when CNT/FP-N, is utilized separator modifier. The charge/discharge platforms well maintained 0.1 5 C, 617 g–1 at C acquired. Notably, initial 990.7 1 obtained, retention 711.3 after 500 cycles, corresponding loss rate only 0.056% per cycle. This work provides feasible scheme for FP application next-generation low-cost systems.

Язык: Английский

Процитировано

0