PVDF‐HFP via Localized Iodization as Interface Layer for All‐Solid–State Lithium Batteries with Li6PS5Cl Films
Source abstract
Abstract
Abstract All‐solid lithium (Li) metal batteries (ASSLBs) with sulfide‐based solid electrolyte (SEs) films exhibit excellent electrochemical performance, rendering them capable of satisfying the growing demand for energy storage systems. However, challenges persist in the application of SEs film owing to their reactivity with Li metal and uncontrolled formation of lithium dendrites. In this study, iodine‐doped poly(vinylidenefluoride‐hexafluoropropylene) (PVDF‐HFP) as an interlayer (PHI) to establish a stable interphase between Li metal and Li6PS5Cl (LPSCl) films is investigated. The release of I ions and PVDF‐HFP produces LiI and LiF, effectively suppressing lithium dendrite growth. Density functional theory calculations show that the synthesized interlayer layer exhibits high interfacial energy. Results show that the PHI@Li/LPSCl film/PHI@Li symmetrical cells can cycle for more than 650 h at 0.1 mA cm−2. The PHI@Li/LPSCl film/NCM622 cell exhibits a distinct enhancement in capacity retention of ≈26% when using LiNi0.6Mn0.2Co0.2O2 (NCM622) as the cathode, compared to pristine Li metal as the anode. This study presents a feasible method for producing next‐generation dendrite‐free SEs films, promoting their practical use in ASSLBs.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Physics and Materials Science Changji University Changji 831100 China
Key Laboratory for Liquid‐Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Research Center for Carbon Nanomaterials Shandong University Jinan 250061 China
State Key Laboratory of Advanced Welding and Joining School of Materials Science and Engineering Harbin Institute of Technology Shenzhen 518055 China
Office of Student Affairs Shandong First Medical University (Shandong Academy of Medical Sciences) Jinan 10439 China
College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High‐performance Carbon‐Materials Qingdao University of Science and Technology Qingdao 266061 China
Funding
National Natural Science Foundation of China · Harbin Institute of Technology · Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials · Shenzhen Science and Technology Innovation Program
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