Journal
NANO LETTERS
Volume 10, Issue 10, Pages 4123-4127Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1023595
Keywords
Batteries; diffusion; nano; ab initio
Categories
Funding
- National Science Foundation [DMS-0855011, DMS-0842504, DMS-0853488]
- Assistant Secretary For Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U S Department of Energy [DE-AC02-05CH11231]
- U S Department of Energy, Office of Science. Office of Basic Energy Sciences [DE-SC0001294]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [GRANTS:13714308, 0819762] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Mathematical Sciences [0854905] Funding Source: National Science Foundation
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Diffusion constants are typically considered to be independent of particle size with the benefit of nanosizing materials arising solely from shortened transport paths We show that for materials with one-dimensional atomic migration channels, the diffusion constant depends on particle size with diffusion in bulk being much slower than in nanoparticles This model accounts for conflicting data on LiFePO4. an important material for rechargeable lithium batteries, specifically explaining why it functions exclusively on the nanoscale
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