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Title: Accelerated Evolution of Surface Chemistry Determined by Temperature and Cycling History in Nickel-Rich Layered Cathode Materials

Journal Article · · ACS Applied Materials and Interfaces
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  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Chemistry
  2. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Geosciences
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
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Nickel-rich layered cathode materials have the potential to enable cheaper and higher energy lithium ion batteries. However, these materials face major challenges (e.g., surface reconstruction, microcracking, potential oxygen evolution) that can hinder the safety and cycle life of lithium ion batteries. Many studies of nickel-rich materials have focused on ways to improve performance. Understanding the effects of temperature and cycling on the chemical and structural transformations is essential to assess the performance and suitability of these materials for practical battery applications. This study is focused on the spectroscopic analysis of surface changes within a strong performing LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode material. We found that surface chemical and structural transformations (e.g., gradient metal reduction, oxygen loss, reconstruction, dissolution) occurred quicker and deeper than expected at higher temperatures. Even at lower temperatures, the degradation occurred rapidly and eventually matched the degradation at high temperatures. Despite these transformations, our performance results showed that a better performing nickel-rich NMC is possible. Establishing relationships between the atomic, structural, chemical, and physical properties of cathode materials and their behavior during cycling, as we have done here for NMC811, opens the possibility of developing lithium ion batteries with higher performance and longer life. Finally, our study also suggests that a separate, systematic, and elaborate study of surface chemistry is necessary for each NMC composition and electrolyte environment.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; SC0012704
OSTI ID:
1470747
Journal Information:
ACS Applied Materials and Interfaces, Vol. 10, Issue 28; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (5)

Controllable Cathode–Electrolyte Interface of Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 for Lithium Ion Batteries: A Review journal August 2019
Stable LiNi 0.8 Co 0.1 Mn 0.1 O 2 |Li Metal Cells with Practical Loading at 30 Degrees C and Elevated Temperatures journal January 2019
Enhanced Electrochemical Properties of LiNi 0.8 Co 0.1 Mn 0.1 O 2 at Elevated Temperature by Simultaneous Structure and Interface Regulating journal January 2019
Long-term chemothermal stability of delithiated NCA in polymer solid-state batteries journal January 2019
Long-Term Chemothermal Stability of Delithiated NCA in Polymer Solid-State Batteries text January 2019

Figures / Tables (6)

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
25 ENERGY STORAGE
layered oxide cathode
nickel rich
phase transformation
surface chemistry
temperature