skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Secondary-Phase Stochastics in Lithium-Ion Battery Electrodes

Abstract

Lithium-ion battery electrodes exhibit complex interplay among multiple electrochemically coupled transport processes, which rely on the underlying functionality and relative arrangement of different constituent phases. The electrochemically inactive solid phases (e.g., conductive additive and binder, referred to as the secondary phase), while beneficial for improved electronic conductivity and mechanical integrity, may partially block the electrochemically active sites and introduce additional transport resistances in the pore (electrolyte) phase. In this work, the role of mesoscale interactions and inherent stochasticity in porous electrodes is elucidated in the context of short-range (interface) and long-range (transport) characteristics. The electrode microstructure significantly affects kinetically and transport-limiting scenarios and thereby the cell performance. The secondary-phase morphology is also found to strongly influence the microstructure-transport-kinetics interactions. Apropos, strategies have been proposed for performance improvement via electrode microstructural modifications.

Authors:
 [1];  [2]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1419417
Report Number(s):
NREL/JA-5400-70743
Journal ID: ISSN 1944-8244
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 7; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; conductive binder; electrochemically active area; electrode microstructural characterization; Li-ion battery; porous composite electrode; secondary-phase morphology

Citation Formats

Mistry, Aashutosh N., Smith, Kandler, and Mukherjee, Partha P. Secondary-Phase Stochastics in Lithium-Ion Battery Electrodes. United States: N. p., 2018. Web. doi:10.1021/acsami.7b17771.
Mistry, Aashutosh N., Smith, Kandler, & Mukherjee, Partha P. Secondary-Phase Stochastics in Lithium-Ion Battery Electrodes. United States. doi:10.1021/acsami.7b17771.
Mistry, Aashutosh N., Smith, Kandler, and Mukherjee, Partha P. Fri . "Secondary-Phase Stochastics in Lithium-Ion Battery Electrodes". United States. doi:10.1021/acsami.7b17771. https://www.osti.gov/servlets/purl/1419417.
@article{osti_1419417,
title = {Secondary-Phase Stochastics in Lithium-Ion Battery Electrodes},
author = {Mistry, Aashutosh N. and Smith, Kandler and Mukherjee, Partha P.},
abstractNote = {Lithium-ion battery electrodes exhibit complex interplay among multiple electrochemically coupled transport processes, which rely on the underlying functionality and relative arrangement of different constituent phases. The electrochemically inactive solid phases (e.g., conductive additive and binder, referred to as the secondary phase), while beneficial for improved electronic conductivity and mechanical integrity, may partially block the electrochemically active sites and introduce additional transport resistances in the pore (electrolyte) phase. In this work, the role of mesoscale interactions and inherent stochasticity in porous electrodes is elucidated in the context of short-range (interface) and long-range (transport) characteristics. The electrode microstructure significantly affects kinetically and transport-limiting scenarios and thereby the cell performance. The secondary-phase morphology is also found to strongly influence the microstructure-transport-kinetics interactions. Apropos, strategies have been proposed for performance improvement via electrode microstructural modifications.},
doi = {10.1021/acsami.7b17771},
journal = {ACS Applied Materials and Interfaces},
issn = {1944-8244},
number = 7,
volume = 10,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: (a) Composite cathode for LIBs is made up of multiple phases: AM particles, conductive additives, binder, and voids for ionic transport. (b) Given the order of magnitude difference in length scales of conductive additives and AM, the distribution of conductive additives + binder (referred to as secondary phasemore » or carbon binder domain) can be jointly expressed as a homogeneous phase. (c−e) The microstructure generation procedure outlined here grows the secondary phase with different morphologies varying between a film-type structure (ω = 0) and a fingerlike arrangement (ω = 1). Also, going toward higher morphologies (i.e., ω→ 1) gives rise to a secondary pore network with a smaller pore size in thicker carbon binder domains.« less

Save / Share:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.