Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms6450
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Funding
- Japan Science and Technology Agency
- Japan Society for the Promotion of Science [25248032, 24710140, 24750005]
- Cabinet Office, Government of Japan, through its 'Funding Program for Next Generation World-Leading Researchers'
- Asahi Glass Foundation
- Murata Science Foundation
- European Research Council Advanced Investigator Grant [ERC-2009-AdG247143]
- Engineering and Physical Sciences Research Council
- Engineering and Physical Sciences Research Council [EP/I007482/1] Funding Source: researchfish
- EPSRC [EP/I007482/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [24710140, 24750005, 25248032] Funding Source: KAKEN
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Intercalation and deintercalation of lithium ions at electrode surfaces are central to the operation of lithium-ion batteries. Yet, on the most important composite cathode surfaces, this is a rather complex process involving spatially heterogeneous reactions that have proved difficult to resolve with existing techniques. Here we report a scanning electrochemical cell microscope based approach to define a mobile electrochemical cell that is used to quantitatively visualize electrochemical phenomena at the battery cathode material LiFePO4, with resolution of similar to 100 nm. The technique measures electrode topography and different electrochemical properties simultaneously, and the information can be combined with complementary microscopic techniques to reveal new perspectives on structure and activity. These electrodes exhibit highly spatially heterogeneous electrochemistry at the nanoscale, both within secondary particles and at individual primary nanoparticles, which is highly dependent on the local structure and composition.
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