Self‐Nitriding Nanostructured Transition Metal Nitrides in Architected‐Carbon Matrices: Unveiling Mechanisms and Advancing Performance in Lithium‐Sulfur Pouch Cells
Source abstract
Abstract
ABSTRACT Transition metal nitrides (TMNs) are attractive for cutting‐edge energy storage technology, especially emerging lithium–sulfur (Li–S) batteries, owing to their electronic structures resembling those of noble metals. Herein, we unveil the underlying mechanism by which TMNs accelerate reaction kinetics, showcasing two nanostructured TMNs (Mo 2 N and VN) embedded within tailored carbon architectures. A novel, unexplored self‐nitriding approach was developed to synthesize TMNs with precisely controlled solid (sC) or hollow (hC) carbon architectures, achieved through a colloidal route using imidazolium‐based poly(ionic liquid) (PIL) nanoparticles as both a nitrogen‐rich template and morphology‐directing agent. Compact TMN architectures as sulfur hosts enhance ion diffusion and reaction kinetics, enabling efficient active site access and delivering high performance, such as VN@sC with high initial capacity of 792 mAh g −1 at 2 C and cyclability up to 650 cycles. Meanwhile, hollow architectures (VN@hC and Mo 2 N@hC) featuring hierarchical porous structures serve as cathode electrocatalytic additives, enabling high sulfur loading and delivering an initial capacity of 1143 mAh g −1 at 0.1 C. Remarkably, this performance is achieved with only 5 wt% additive content in scalable 7.9 × 11 cm 2 and 12‐layer pouch cells designed for drone power systems.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Electrochemical Energy Storage Helmholtz‐Zentrum Berlin für Materialien und Energie Berlin Germany
Institute for Technical and Environmental Chemistry Friedrich‐Schiller‐Universität Jena Jena Germany
Department of Colloid Chemistry Max Planck Institute of Colloids and Interfaces Potsdam Germany
Department of Chemistry Stockholm University Stockholm Sweden
Department of Interface Design Helmholtz‐Zentrum Berlin für Materialien und Energie Berlin Germany
Energy Materials In‐Situ Laboratory Berlin (EMIL) Helmholtz‐Zentrum Berlin für Materialien Und Energie Berlin Germany
Department of X‐ray Spectroscopy at Interfaces of Thin Films Helmholtz Institute Erlangen‐Nürnberg For Renewable Energy (HIERN) Berlin Germany
Department of Chemistry and Pharmacy Friedrich‐Alexander‐Universität Erlangen‐Nürnberg (FAU) Erlangen Germany
Department of Chemistry Functional Materials Technical University Berlin Berlin Germany
Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China
Helmholtz Institute For Polymers in Energy Applications (HIPOLE Jena) Jena Germany
Funding
Wenner-Gren Stiftelserna · Bundesministerium für Bildung und Forschung
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