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Temperature-Dependent Solubility of Solid Electrolyte Interphase on Silicon Electrodes

Journal Article · · ACS Energy Letters
 [1];  [2];  [2];  [3];  [2];  [2];  [4];  [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Colorado School of Mines, Golden, CO (United States)
  4. Univ. of Colorado, Boulder, CO (United States)
+ Show Author Affiliations

The lithium-ion batteries powering mass market electric vehicles must be capable of operating in a wide temperature range. Temperature variation has the possibility to greatly affect the stability of the solid electrolyte interphase (SEI) responsible for mitigating capacity fade due to electrolyte decomposition in the lithium-ion battery. Here, we explore the solubility of the SEI on the silicon (Si) electrode, an alternative anode material to the conventional graphite electrode, at temperatures ranging from -10 to 50 °C. Through use of an electrochemical protocol with a high cathodic cutoff voltage, we measure the evolution of the SEI independently of competing Si mechanical stress. We correlate the electrochemical data with three-dimensional resistivity versus depth profiling as well as atomic force microscopy to show that SEI dissolution occurs at significantly faster rates at higher temperatures.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1573783
Report Number(s):
NREL/JA-5K00-75347
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 12 Vol. 4; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (5)

Figure 1(p. 3)figure Figure 1
Figure 2(p. 3)figure Figure 2
Figure 3(p. 4)figure Figure 3
Figure 4(p. 4)figure Figure 4
Figure 5(p. 5)figure Figure 5

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Related Subjects

25 ENERGY STORAGE
capacity
lithium-ion batteries
solid electrolyte interphase
temperature