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Title: Localized concentration reversal of lithium during intercalation into nanoparticles

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [1];  [6];  [7]; ORCiD logo [5];  [5];  [8]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States); Michigan State Univ., East Lansing, MI (United States)
  3. Univ. of Cambridge, Cambridge (United Kingdom); Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Chinese Academy of Sciences, Ningbo (People's Republic of China)
  6. Univ. of Michigan, Ann Arbor, MI (United States)
  7. Univ. of Cambridge, Cambridge (United Kingdom)
  8. Univ. of California, Berkeley, CA (United States)

Nanoparticulate electrodes, such as LixFePO4, have unique advantages over their microparticulate counterparts for the applications in Li-ion batteries because of the shortened diffusion path and access to nonequilibrium routes for fast Li incorporation, thus radically boosting power density of the electrodes. However, how Li intercalation occurs locally in a single nanoparticle of such materials remains unresolved because real-time observation at such a fine scale is still lacking. We report visualization of local Li intercalation via solid-solution transformation in individual LixFePO4 nanoparticles, enabled by probing sub-angstrom changes in the lattice spacing in situ. The real-time observation reveals inhomogeneous intercalation, accompanied with an unexpected reversal of Li concentration at the nanometer scale. The origin of the reversal phenomenon is elucidated through phase-field simulations, and it is attributed to the presence of structurally different regions that have distinct chemical potential functions. Furthermore, the findings from this study provide a new perspective on the local intercalation dynamics in battery electrodes.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Northeastern Center for Chemical Energy Storage (NECCES); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
SC0012704
OSTI ID:
1438434
Report Number(s):
BNL-203647-2018-JAAM
Journal Information:
Science Advances, Vol. 4, Issue 1; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 50 works
Citation information provided by
Web of Science

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Cited By (7)

Revealing the Atomic Origin of Heterogeneous Li‐Ion Diffusion by Probing Na journal May 2019
Interfacial Lattice‐Strain‐Driven Generation of Oxygen Vacancies in an Aerobic‐Annealed TiO 2 (B) Electrode journal November 2019
Lithium/Oxygen Incorporation and Microstructural Evolution during Synthesis of Li-Rich Layered Li[Li 0.2 Ni 0.2 Mn 0.6 ]O 2 Oxides journal February 2019
Multi-electron transfer enabled by topotactic reaction in magnetite journal April 2019
A mechanism of defect-enhanced phase transformation kinetics in lithium iron phosphate olivine journal December 2019
Upgrading traditional liquid electrolyte via in situ gelation for future lithium metal batteries journal October 2018
Controllable two-dimensional movement and redistribution of lithium ions in metal oxides journal June 2019

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