Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep18482
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Funding
- Laboratory Directed Research and Development (LDRD) program at Los Alamos National Laboratory
- Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratorie (SNL)
- Nanostructures for Electrical Energy Storage (NEES)
- Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DESC0001160]
- NSF CAREER Award [ECCS-1351980]
- NSF [DMR-1503595]
- U.S. Department of Energy, Office of Basic Energy Sciences User Facility at Los Alamos National Laboratory [DE-AC52-06NA25396]
- U.S. Department of Energy, Office of Basic Energy Sciences User Facility at Sandia National Laboratorie [DE-AC04-94AL85000]
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1503595] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1351980] Funding Source: National Science Foundation
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Safe and efficient operation of lithium ion batteries requires precisely directed flow of lithium ions and electrons to control the first directional volume changes in anode and cathode materials. Understanding and controlling the lithium ion transport in battery electrodes becomes crucial to the design of high performance and durable batteries. Recent work revealed that the chemical potential barriers encountered at the surfaces of heteromaterials play an important role in directing lithium ion transport at nanoscale. Here, we utilize in situ transmission electron microscopy to demonstrate that we can switch lithiation pathways from radial to axial to grain-by-grain lithiation through the systematic creation of heteromaterial combinations in the Si-Ge nanowire system. Our systematic studies show that engineered materials at nanoscale can overcome the intrinsic orientation-dependent lithiation, and open new pathways to aid in the development of compact, safe, and efficient batteries.
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