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Journal article
Improved electrochemical cycling stability of intercalation battery electrodes via control of material morphology
Ionics, v 25(2), pp 493-502
01 Feb 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Using a model tunnel manganese oxide with the todorokite crystal structure (T-MnO2), we demonstrate that controlling the morphology of the active material can improve the cycling stability of intercalation battery electrodes. The T-MnO2 structure is built from tunnels that provide spacious 1D diffusion channels for charge-carrying ions. Taking advantage of the unique ability to synthesize T-MnO2 in the form of both highly crystalline two-dimensional (2D) nanoplatelets and one-dimensional (1D) nanowires through a facile hydrothermal growth method, we investigated the effect of nanoscale particle dimensions on reversible battery cycling. Insertion of ions into the tunnels results in anisotropic expansion of the structure, making T-MnO2 with different morphologies an excellent model platform to understand how intercalation-induced volume change, typically leading to the deterioration of the electrode performance over extended cycling, can be controlled through synthesis of targeted morphologies. T-MnO2 nanowires showed not only significantly improved capacity retention but also substantially higher specific capacity than the T-MnO2 nanoplatelets. The enhanced electrochemical properties of the nanowire electrodes could be attributed to the larger surface-to-volume ratio than that of nanoplatelets, resulting in higher contact area with electrolyte for the nanowires. Moreover, due to the smaller cross-sectional area of the nanowires, volume expansion and contraction perpendicular to the structural tunnels induced by reversible ion intercalation occurs in a more facile fashion. This work shows that chemically controlling morphology and producing particles with nanostructure dimensionality replicating that of atomic structure (i.e., 1D morphology and 1D structure) makes it possible to enhance material performance.
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Details
- Title
- Improved electrochemical cycling stability of intercalation battery electrodes via control of material morphology
- Creators
- Bryan W. Byles - Drexel UniversityMallory Clites - Drexel UniversityDavid A. Cullen - Oak Ridge National LaboratoryKarren L. More - Oak Ridge National LaboratoryEkaterina Pomerantseva - Drexel University
- Publication Details
- Ionics, v 25(2), pp 493-502
- Publisher
- Springer Nature
- Number of pages
- 10
- Grant note
- CBET-1604483 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000457774500012
- Scopus ID
- 2-s2.0-85053529722
- Other Identifier
- 991019168836104721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Physics, Condensed Matter