Journal article
Dopamine Surface Functionalized 1D Titania Lepidocrocite Porous Mesostructured Particles for Improved Polysulfide Anchoring in Lithium Sulfur Cells
ChemSusChem, v 18(24), e202501268
13 Dec 2025
PMID: 41137213
Abstract
Lithium-sulfur (Li-S) batteries offer high specific capacities but their development is hindered by several issues, most notably polysulfide shuttle. Previously, a new form of titania nanomaterial, 1D lepidocrocite (1DL) nanofilaments was shown to serve as a sulfur (S) host for Li-S batteries. In this work, porous mesostructured particles are introduced as a new morphology of the titania 1DL to improve its performance as a S host. Furthermore, employing a facile, aqueous, one-step surface functionalization with dopamine enhances 1DL interactions with S, as confirmed by changes in infrared spectroscopy peaks and an increase in d-spacing via X-ray diffraction. This surface functionalization results in a reduction of 1DL band gap energy (E g) from 3.62 to approximate to 2.29 eV, resulting in a 2.6-fold increase in electrical conductivity. Additionally, the surface functionalization renders a more conformal coating of S on the 1DL, leading to increased S utilization and interaction with the 1DL. Electrochemical testing shows a 20% reduction in the polysulfide shuttle current in comparison to base 1DL and 560 mAh g-1 at 0.5 C at a S-loading of 2 mg cm-2. Postmortem X-ray photoelectron spectroscopy analysis also reveals stronger thiosulfate signals in the dopamine-functionalized 1DLs, further confirming improved S interactions compared to untreated 1DL.
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Details
- Title
- Dopamine Surface Functionalized 1D Titania Lepidocrocite Porous Mesostructured Particles for Improved Polysulfide Anchoring in Lithium Sulfur Cells
- Creators
- Neal A. Cardoza - Drexel Univ, Dept Chem & Biol Engn, 3141 Chestnut St, Philadelphia, PA 19104 USAMary Qin Hassig - Drexel Univ, Dept Mat Sci & Engn, 3141 Chestnut St, Philadelphia, PA 19104 USATaber Yim - Drexel University, Materials Characterization CoreGregory R. Schwenk - Drexel University, Materials Science and EngineeringTran Ngo - Cornell UniversityMichel W. Barsoum - Drexel University, Materials Science and EngineeringVibha Kalra - Drexel University, Chemical and Biological Engineering
- Publication Details
- ChemSusChem, v 18(24), e202501268
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- Cornell University
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering; Materials Characterization Core
- Web of Science ID
- WOS:001599538800001
- Scopus ID
- 2-s2.0-105019599608
- Other Identifier
- 991022124262004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Green & Sustainable Science & Technology