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oai:www.ideals.illinois.edu:2142/109483 2023-07-11 col_2142_5131 col_2142_13836 com_2142_5130 com_2142_13835 com_2142_234

Sottos, Nancy R. Diamond, Jacob M. 2021-03-05T21:40:40Z 2021-03-05T21:40:40Z 2023-03-05T21:43:00Z 2020-10-21 2020-12 Future energy storage needs are rapidly moving beyond the capabilities of current Li-ion battery technologies. The demand for greater energy density, performance, and longevity has led to the development of numerous three-dimensional (3D) structured anodes that can leverage the incredible Li storage capacity of silicon. A common feature among many 3D structured anodes is the use of a nickel (Ni) current collector scaffold coated with amorphous silicon (a-Si) active material. Despite the importance of a-Si remaining adhered to the Ni scaffold during cycling, little work has been done to study the interface strength of Ni/a-Si systems. Here, we investigate Ni/a-Si interfacial adhesion strength through the technique of laser spallation (LS) combined with finite element analysis (FEA). It was found that the Ni/a-Si interface can withstand at least ~250 MPa in tension before failure is initiated. Tests at higher stress levels were inconclusive due to consistent failure of the sample at the substrate/a-Si interface rather than the Ni/a-Si interface. Results also showed that the adhesion strength of Ni/a-Si was much weaker when a-Si was deposited by chemical vapor deposition (CVD) rather than electron-beam (e-beam) evaporation. This study brings insight to the durability Ni/a-Si structured anodes and will prove valuable in the design of future battery technologies. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-12-01 The student, Jacob Diamond, accepted the attached license on 2020-10-16 at 11:05. The student, Jacob Diamond, submitted this Thesis for approval on 2020-10-16 at 11:15. This Thesis was approved for publication on 2020-10-21 at 08:48. DSpace SAF Submission Ingestion Package generated from Vireo submission #15837 on 2021-03-04 at 16:19:21 Made available in DSpace on 2021-03-05T21:40:40Z (GMT). No. of bitstreams: 2 DIAMOND-THESIS-2020.pdf: 1536376 bytes, checksum: 43600d62d36a3db4993ccd24cd1a96f0 (MD5) LICENSE.txt: 4210 bytes, checksum: c0c7840eebb7a148122e103a327df5e5 (MD5) Previous issue date: 2020-10-21 Embargo set by: Seth Robbins for item 117187 Lift date: 2023-03-05T21:40:52Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 117187 Lift date: 2023-03-05T21:43:00Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only application/pdf http://hdl.handle.net/2142/109483 en Copyright 2020 Jacob Diamond Thin Films Adhesion Structured Anodes Laser Spallation Interfacial adhesion of thin film high energy density anode materials text Thesis Materials Science and Engineering Materials Science and Engineering University of Illinois at Urbana-Champaign Thesis M.S.