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Title: Structural integrity--Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques

Journal Article · · Nano Energy
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [4];  [2];  [8]
  1. Donghua Univ., Shanghai (China). College of Mechanical Engineering; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry
  3. Univ. of California, San Francisco, CA (United States). Division of Biomaterials and Bioengineering
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  5. Donghua Univ., Shanghai (China). College of Mechanical Engineering
  6. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry; Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
  8. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS
+ Show Author Affiliations

Li-rich layered materials are important cathode compounds used in commercial lithium ion batteries, which, however, suffers from some drawbacks including the so-called voltage fade upon electrochemical cycling. Here, our study employs novel transmission X-ray microscopy to investigate the electrochemical reaction induced morphological and chemical changes in the Li-rich Li2Ru0.5Mn0.5O3 cathode particles at the meso to nano scale. We performed combined X-ray spectroscopy, diffraction and microscopy experiments to systematically study this cathode material's evolution upon cycling as well as to establish a comprehensive understanding of the structural origin of capacity fade through 2D and 3D fine length scale morphology and heterogeneity change of this material. This work suggests that atomic manipulation (e.g. doping, substitution etc.) or nano engineering (e.g. nano-sizing, heterogeneous structure) are important strategies to mitigate the internal strain and defects induced by extensive lithium insertion/extraction. It also shows that maintaining the structural integrity is the key in designing and synthesizing lithium-rich layered materials with better cycle stability.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Scientific Foundation of China; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI ID:
1322368
Journal Information:
Nano Energy, Vol. 28, Issue C; ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
United States
Language:
ENGLISH

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Cited By (8)

Voltage Decay in Layered Li-Rich Mn-Based Cathode Materials journal August 2019
Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release journal July 2018
Cracks Formation in Lithium-Rich Cathode Materials for Lithium-Ion Batteries during the Electrochemical Process journal October 2018
Unsupervised Data Mining in nanoscale X-ray Spectro-Microscopic Study of NdFeB Magnet journal September 2016
Surface Doping to Enhance Structural Integrity and Performance of Li-Rich Layered Oxide journal October 2018
Synthesis and characterization of Ru doped NaNi0.5Mn0.3Ti0.2O2 cathode material with improved electrochemical performance for sodium-ion batteries journal January 2019
Ecofriendly Chemical Activation of Overlithiated Layered Oxides by DNA‐Wrapped Carbon Nanotubes journal January 2020
Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery journal April 2019

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