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Title: Accelerated Aging of Li(Si)/FeS2 Thermal Batteries.

Abstract

Abstract not provided.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Security (NA-70)
OSTI Identifier:
1364692
Report Number(s):
SAND2016-4781C
640502
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 47th Power Sources Conference held June 13 - May 19, 2016 in Orlando, FL.
Country of Publication:
United States
Language:
English

Citation Formats

Wesolowski, Daniel Edward, Allen, Ashley Nicole, Staiger, Chad, Ambrosini, Andrea, Missert, Nancy A., Peebles, Henry C., and Anderson, Travis Mark. Accelerated Aging of Li(Si)/FeS2 Thermal Batteries.. United States: N. p., 2016. Web.
Wesolowski, Daniel Edward, Allen, Ashley Nicole, Staiger, Chad, Ambrosini, Andrea, Missert, Nancy A., Peebles, Henry C., & Anderson, Travis Mark. Accelerated Aging of Li(Si)/FeS2 Thermal Batteries.. United States.
Wesolowski, Daniel Edward, Allen, Ashley Nicole, Staiger, Chad, Ambrosini, Andrea, Missert, Nancy A., Peebles, Henry C., and Anderson, Travis Mark. Sun . "Accelerated Aging of Li(Si)/FeS2 Thermal Batteries.". United States. doi:. https://www.osti.gov/servlets/purl/1364692.
@article{osti_1364692,
title = {Accelerated Aging of Li(Si)/FeS2 Thermal Batteries.},
author = {Wesolowski, Daniel Edward and Allen, Ashley Nicole and Staiger, Chad and Ambrosini, Andrea and Missert, Nancy A. and Peebles, Henry C. and Anderson, Travis Mark},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun May 01 00:00:00 EDT 2016},
month = {Sun May 01 00:00:00 EDT 2016}
}

Conference:
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  • The formation of Li/sub 2/O in Li(Si)/FeS/sub 2/ thermal batteries has been considered deleterious to performance. This paper presents the results of a study to determine performance degradation caused by Li/sub 2/O and to determine an acceptable level of Li/sub 2/O to define dryness of battery parts and allowable leak rates. The significant results are (1) Excessive Li/sub 2/O causes an abrupt end of life during discharge of Li/sub 7/Si/sub 3/ to Li/sub 12/Si/sub 7/. This effect is first observed at 15 wt% and always occurs if the Li/sub 2/O content of the anode reaches 30 wt%. (2) A layermore » of Li/sub 2/O on anode pellet surfaces adjacent to the current collectors causes the same abrupt end of life if that layer represents 6-8 wt% Li/sub 2/O in the anode pellet. (3) Li/sub 2/O increases the ''wetness'' of separator pellets. This effect reaches a plateau at about2.5 wt% Li/sub 2/O in a separator pellet which is 65 wt% LiC1. KC1 eutectic blended with 35 wt% MgO.« less
  • Thermally activated batteries using the Li(Si)/FeS/sub 2/ system are being developed by Sandia National Laboratories. These components are used in systems which require a storage life of 25 years and high reliability. A previous aging study was completed on this system, but no organic materials other than those in the electrical match and heat paper fuse strips were included. The present study incorporates all of the materials in the system, both organic and inorganic, except for the electric match and heat paper. There are two main parts in this study: (1) a compatability study in which the four organic materialsmore » under investigation are placed in a hermetically sealed stainless steel container with battery components; (2) an aging study of pairs of material and individual materials in which one organic material is placed in a hermetically sealed stainless steel container with battery components. The compatibility study examines effects of some materials upon others (outgassing, etc.) which would cause degradation and/or functional failure. The compatibility materials in this study were aged at 75/sup 0/C. The aging study uses three temperatures (75, 65, and 55/sup 0/C) to span activation energies and utilizes failure mode testing related to aging effects. Testing intervals are two, four, eight, and twelve months. Data from the two studies can be correlated and lifetime predictions are possible.« less
  • Sandia Laboratories is developing Li(Si)/FeS/sub 2/ thermally activated batteries for applications that require high reliability and a shelf life of twenty-five years. To determine the feasibility of achieving these requirements, an accelerated aging study was undertaken. The major objective of this work was to identify deleterious chemical reactions that could affect performance and reliability during the twenty-five year shelf life. The approach used was to accelerate the aging of batteries by storage at elevated temperature, and then to examine and analyze materials from some batteries, while discharging others. A battery design that used no organic materials (except for those inmore » an electrical match) was chosen in order to minimize the number of possible deleterious reactions. The reaction of Li(Si) with water outgased from the various battery parts was the only effect deleterious to shelf life that was noted. 4 figures, 4 tables. (RWR)« less
  • These batteries are for use in systems which require a storage life of 25 years and high reliability. This compatibility and aging study incorporates all of the materials in the system, both organic and inorganic, except the heat paper and electric match. Results indicate no compatibility or aging problems. These results are: oxygen vanishes from the overgas in containers that were accelerated-aged; hydrogen increases sharply in the overgas initially but generally decreases as aging progresses. No unexpected or significant changes were observed in the volume resistivity, glass transition temperature, or shear modulus or organic materials. (DLC)
  • A technique for accelerating the aging process of thermally activated batteries that use iron disulfide was developed. In this approach, storage at 130/sup 0/C for one week was assumed equivalent to a shelf life of five years. Some of the batteries stored at 130/sup 0/C were discharged to test for functionality changes, and others were disassembled and carefully analyzed for evidence of deleterious reactions. Some functionality anomalies were observed. The only deleterious reaction observed was that of Li(Si) reacting with water vapor. 3 figures, 6 tables.