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Dynamics of particle network in composite battery cathodes

Journal Article · · Science
 [1];  [2];  [3];  [4];  [4];  [5];  [5];  [3];  [3];  [4];  [5];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); SLAC
  2. Purdue Univ., West Lafayette, IN (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. European Synchrotron Radiation Facility, Grenoble (France)
  5. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
We report that improving composite battery electrodes requires a delicate control of active materials and electrode formulation. The electrochemically active particles fulfill their role as energy exchange reservoirs through interacting with the surrounding conductive network. We formulate a network evolution model to interpret the regulation and equilibration between electrochemical activity and mechanical damage of these particles. Through statistical analysis of thousands of particles using x-ray phase contrast holotomography in a LiNi0.8Mn0.1Co0.1O2-based cathode, we found that the local network heterogeneity results in asynchronous activities in the early cycles, and subsequently the particle assemblies move toward a synchronous behavior. Our study pinpoints the chemomechanical behavior of individual particles and enables better designs of the conductive network to optimize the utility of all the particles during operation.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; SC0012704
OSTI ID:
1870825
Alternate ID(s):
OSTI ID: 1890214
Report Number(s):
BNL-223520-2022-JAAM
Journal Information:
Science, Journal Name: Science Journal Issue: 6592 Vol. 376; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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