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Title: In situ Visualization of State-of-Charge Heterogeneity within a LiCoO2 Particle that Evolves upon Cycling at Different Rates

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [5]; ORCiD logo [4]; ORCiD logo [5];  [2]; ORCiD logo [4]
  1. Donghua Univ., Shanghai (China). College of Mechanical Engineering; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
  3. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of High Energy Physics. Beijing Synchrotron Radiation Facility
  4. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  6. Donghua Univ., Shanghai (China). College of Mechanical Engineering

For designing new battery systems with higher energy density and longer cycle life, it is important to understand the degradation mechanism of the electrode material, especially at the individual particle level. Using in situ transmission X-ray microscopy (TXM) coupled to a pouch cell setup, the inhomogeneous Li distribution as well as the formation, population, and evolution of inactive domains in a single LiCoO2 particle were visualized in this paper as it was cycled for many times. It is found that the percentage of the particle that fully recovered to the pristine state is strongly related to the cycling rate. Interestingly, we also observed the evolution of the inactive region within the particle during long-term cycling. The relationship between morphological degradation and chemical inhomogeneity, including the formation of unanticipated Co metal phase, is also observed. Finally, our work highlights the capability of in situ TXM for studying the degradation mechanism of materials in LIBs.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES); Ministry of Science and Technology of China; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Open Research Foundation of State Key Laboratory of Digital Manufacturing Equipment and Technology (China); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Organization:
Donghua Univ., Shanghai (China)
Grant/Contract Number:
SC0012704; AC02-76SF00515; 2016YFB0100300; 2016YFA0400900; 11535015; U1632110; Battery500 consortium
OSTI ID:
1358026
Alternate ID(s):
OSTI ID: 1368569
Report Number(s):
BNL-113846-2017-JA; R&D Project: MA453MAEA
Journal Information:
ACS Energy Letters, Vol. 2, Issue 5; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 130 works
Citation information provided by
Web of Science

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Trace doping of multiple elements enables stable battery cycling of LiCoO2 at 4.6 V journal June 2019
Suppressing Manganese Dissolution via Exposing Stable {111} Facets for High‐Performance Lithium‐Ion Oxide Cathode journal April 2019
Charge distribution guided by grain crystallographic orientations in polycrystalline battery materials journal January 2020
Origins of capacity and voltage fading of LiCoO 2 upon high voltage cycling journal January 2019
Reviving lithium cobalt oxide-based lithium secondary batteries-toward a higher energy density journal January 2018
Thermally driven mesoscale chemomechanical interplay in Li 0.5 Ni 0.6 Mn 0.2 Co 0.2 O 2 cathode materials journal January 2018
Role and importance of surface heterogeneities in transport of particles in saturated porous media journal June 2019
Propagation topography of redox phase transformations in heterogeneous layered oxide cathode materials journal July 2018
TOPAS and TOPAS-Academic : an optimization program integrating computer algebra and crystallographic objects written in C++ journal February 2018
Probing and quantifying cathode charge heterogeneity in Li ion batteries journal January 2019
Review of Recent Development of In Situ/Operando Characterization Techniques for Lithium Battery Research journal May 2019
High‐Voltage Charging‐Induced Strain, Heterogeneity, and Micro‐Cracks in Secondary Particles of a Nickel‐Rich Layered Cathode Material journal March 2019
Anisotropically Electrochemical–Mechanical Evolution in Solid‐State Batteries and Interfacial Tailored Strategy journal November 2019
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