X-ray Absorption Spectroscopy Characterization of a Li/S Cell
- Univ. of Science and Technology of China, Hefei (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division; Univ. of California, Berkeley, CA (United States)
- Washington State Univ., Pullman, WA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Harbin Inst. of Technology (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of California, Santa Cruz, CA (United States)
- Univ. of Science and Technology of China, Hefei (China)
The X-ray absorption spectroscopy technique has been applied to study different stages of the lithium/sulfur (Li/S) cell life cycle. We investigated how speciation of S in Li/S cathodes changes upon the introduction of CTAB (cetyltrimethylammonium bromide, CH3(CH2)15N+(CH3)3Br₋) and with charge/discharge cycling. The introduction of CTAB changes the synthesis reaction pathway dramatically due to the interaction of CTAB with the terminal S atoms of the polysulfide ions in the Na2Sx solution. For the cycled Li/S cell, the loss of electrochemically active sulfur and the accumulation of a compact blocking insulating layer of unexpected sulfur reaction products on the cathode surface during the charge/discharge processes make the capacity decay. Lastly, a modified coin cell and a vacuum-compatible three-electrode electro-chemical cell have been introduced for further in-situ/in-operando studies.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; 2013CB834605; U1232102; 21173200; 21473178; (2015SRG-HSC031; 2015HSC-UP022
- OSTI ID:
- 1254009
- Alternate ID(s):
- OSTI ID: 1379029
- Journal Information:
- Nanomaterials, Vol. 6, Issue 1; ISSN 2079-4991
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
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