Lithium selenium (Li-Se) batteries have attracted increasing interest for its high theoretical volumetric capacities up to 3,253 Ah L. However, current studies are largely limited to electrodes with rather low mass loading and low areal capacity, resulting in low volumetric performance. Herein, we report a design of covalent selenium embedded in hierarchical nitrogen-doped carbon nanofibers (CSe@HNCNFs) for ultra-high areal capacity Li-Se batteries. The CSe@HNCNFs provide excellent ion and electron transport performance, whereas effectively retard polyselenides diffusion during cycling. We show that the Li-Se battery with mass loading of 1.87 mg cm displays a specific capacity of 762 mAh g after 2,500 cycles, with almost no capacity fading. Furthermore, by increasing the mass loading to 37.31 mg cm, ultra-high areal capacities of 7.30 mAh cm is achieved, which greatly exceeds those reported previously for Li-Se batteries.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7049659 | PMC |
| http://dx.doi.org/10.1016/j.isci.2020.100919 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Anchoring and Catalytic Performance of Co@CN Monolayer for Rechargeable Li-SeS Batteries: A First-Principles Calculations.
Molecules
November 2024
College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China.
SeS composite cathode materials, which offer superior theoretical capacity compared to pure selenium and improved electrochemical properties relative to pure sulfur, have aroused considerable interest in recent decades on account of their applications in electric vehicles and energy storage grids. In the current work, the feasibility of a Co@CN monolayer as a promising host candidate for the cathode material of Li-SeS batteries has been evaluated using first-principles calculations, and particular efforts have been devoted to underscoring the anchoring mechanism and catalytic performance of the Co@CN monolayer. The pronounced synergistic effects of Co-S and Li-N bonds lead to increased anchoring performance for LiSeS/SeS clusters on the surface of Co@CN monolayer, which effectively inhibit the shuttle effect.
View Article and Find Full Text PDFA Piezocatalysis Strategy to Enable Efficient Redox in Solid-State Battery.
Angew Chem Int Ed Engl
October 2024
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Piezocatalysis is considered to be a favorable catalytic technology by utilizing external mechanical stimulation to promote the specific redox reactions. The application of piezocatalysis in batteries is promising but faces formidable challenges. Herein, the operation principles of piezocatalysis were successfully demonstrated by constructing solid-state Li-Se and Li-S battery models with interfacial stress accumulation.
View Article and Find Full Text PDFSynchronously Consolidating Li, Se, S, and C for Robust Li-SeS Batteries.
Nano Lett
October 2024
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
S-redox involving solvated polysulfides is accompanied by volumetric change and structural decay of the S-based cathodes. Here, we propose a synchronous construction strategy for consolidating Li, Se, S, and C elements within a composite cathode via a paradigm reaction of 8Li+2Se+CS = 2LiSeS+C. The obtained composite features crystalline LiSeS encapsulated in a carbon nanocage (LiSeS@C), exhibiting ultrahigh electrical conductivity, ultralow activation barrier, and excellent structural integrity, accordingly enabling large specific capacity (615 mAh g) and high capacity retention (87.
View Article and Find Full Text PDFSynthesis of hierarchical porous carbon scaffold derived from red kidney bean peels for advanced Li-Se and Na-Se batteries.
Sci Rep
July 2024
School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, People's Republic of China.
Incorporating selenium into high-surface-area carbon with hierarchical pores, derived from red kidney bean peels via simple carbonization/activation, yields a superior Li-Se battery cathode material. This method produces a carbon framework with 568 m g surface area, significant pore volume, and improves the composite's electronic conductivity and stability by mitigating volume changes and reducing lithium polyselenide dissolution. The Se@ACRKB composite, containing 45 wt% selenium, shows high discharge capacities (609.
View Article and Find Full Text PDFBiometabolically Derived Selenium Nanoparticles Armed with Protein Protective Suit toward High-Performance Li-Se Batteries.
Adv Mater
September 2024
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
Selenium (Se) serves as a burgeoning high-energy-density cathode material in lithium-ion batteries. However, the development of Se cathode is strictly limited by low Se utilization and inferior cycling stability arising from intrinsic volume expansion and notorious shuttle effect. Herein, a microbial metabolism strategy is developed to prepare "functional vesicle-like" Se globules via Bacillus subtilis subsp.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!