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Synthesis, structure, and electrochemical Li-ion intercalation properties of Li4Ti5O12 - Li2Ti3O7 nanocomposites

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dc.contributor.advisor Su, Dong en_US
dc.contributor.author Sun, Zelun en_US
dc.contributor.other Department of Materials Science and Engineering. en_US
dc.date.accessioned 2017-09-20T16:50:04Z
dc.date.available 2017-09-20T16:50:04Z
dc.date.issued 2015-08-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/76348 en_US
dc.description 55 pg. en_US
dc.description.abstract Lithium ion batteries (LIBs) are expected to be used for energy storage in electric vehicles (EVs) as well as for load leveling for photovoltaic power generation or wind power generation. For the LIBs in EVs, Spinel-type Li4Ti5O12 (LTO) has been investigated as an alternative anode material. However, the disadvantage of LTO as an anode is the low electronic conductivity resulting from its insulating ionic crystal structure. On the other hand, ramsdellite-type Li2Ti3O7 (RLTO) already has good electrical conductivity. In our research, LTO nano powders were synthesized/reprocessed by RTP processing and the stability of Li4Ti5O12 was successfully studied by XRD measurement and half-quantitate calculation based on XRD results. By introducing a new method to synthesis/process Li4Ti5O12, we were able to synthesis a new Li4Ti5O12 - Li2Ti3O7 nanocomposite. The components were also studied by changing the annealing environment (annealing temperature, holding time, and atmosphere). This shows a final state of LTO using rapid thermo annealing as a synthesis/reprocessing method can be reached when annealing temperature is higher than 900 ℃ or the holding time ≥ 60 seconds at 880 ℃ , with a result of a composition of 25.4% Li2Ti3O7 and 74.6% Li4Ti5O12. The electrochemical properties of annealed LTO were also studied which showed a better capacity and better cyclability. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Materials Science en_US
dc.title Synthesis, structure, and electrochemical Li-ion intercalation properties of Li4Ti5O12 - Li2Ti3O7 nanocomposites en_US
dc.type Thesis en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Gersappe, Dilip en_US
dc.contributor.committeemember Venkatesh, T. A.. en_US

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