Investigation of nickel oxide and germanium for Li-ion battery anodes
We aimed to develop high performance anodes for Li-ion batteries. Three approaches were investigated to minimize the aggregation, pulverization and delamination problems. Firstly, graphitic and amorphous carbon was incorporated to directly-grown NiO nanostructures. NiO-C showed better electrochemica...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/62246 |
| _version_ | 1826109997943095296 |
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| author | Rahmat, Agung Susantyoko |
| author2 | Zhang Qing |
| author_facet | Zhang Qing Rahmat, Agung Susantyoko |
| author_sort | Rahmat, Agung Susantyoko |
| collection | NTU |
| description | We aimed to develop high performance anodes for Li-ion batteries. Three approaches were investigated to minimize the aggregation, pulverization and delamination problems. Firstly, graphitic and amorphous carbon was incorporated to directly-grown NiO nanostructures. NiO-C
showed better electrochemical performances than pristine-NiO due to high electrical conductance and better mechanical flexibility of graphitic and/or amorphous carbon.
Secondly, vertically-aligned MWCNT arrays were used as base structures for sputtered-NiO, amorphous-Ge and polycrystalline-Ge. The
electrochemical performances of MWCNT/NiO were significantly improved than pristine-NiO since vertically-aligned MWCNTs enhanced the ionic and
electronic transports and absorbed the stresses during lithiation/delithiation.
MWCNT/a-Ge showed higher specific capacity than MWCNT/c-Ge as MWCNT/a-Ge skipped electrochemically-driven solid-state amorphization
during first lithiation. MWCNT/a-Ge benefited from low cost processing and low anodic scan peak. Thirdly, annealing treatment was investigated. Annealed-Ge had
significantly improved electrochemical performances than as-deposited Ge
due to better SS/Ge-film adhesion due to inter-diffusion at SS/Ge interface. |
| first_indexed | 2024-10-01T02:27:35Z |
| format | Thesis |
| id | ntu-10356/62246 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:27:35Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/622462023-03-11T17:59:08Z Investigation of nickel oxide and germanium for Li-ion battery anodes Rahmat, Agung Susantyoko Zhang Qing Pey Kin Leong School of Mechanical and Aerospace Engineering Singapore-MIT Alliance Programme DRNTU::Engineering::Electrical and electronic engineering We aimed to develop high performance anodes for Li-ion batteries. Three approaches were investigated to minimize the aggregation, pulverization and delamination problems. Firstly, graphitic and amorphous carbon was incorporated to directly-grown NiO nanostructures. NiO-C showed better electrochemical performances than pristine-NiO due to high electrical conductance and better mechanical flexibility of graphitic and/or amorphous carbon. Secondly, vertically-aligned MWCNT arrays were used as base structures for sputtered-NiO, amorphous-Ge and polycrystalline-Ge. The electrochemical performances of MWCNT/NiO were significantly improved than pristine-NiO since vertically-aligned MWCNTs enhanced the ionic and electronic transports and absorbed the stresses during lithiation/delithiation. MWCNT/a-Ge showed higher specific capacity than MWCNT/c-Ge as MWCNT/a-Ge skipped electrochemically-driven solid-state amorphization during first lithiation. MWCNT/a-Ge benefited from low cost processing and low anodic scan peak. Thirdly, annealing treatment was investigated. Annealed-Ge had significantly improved electrochemical performances than as-deposited Ge due to better SS/Ge-film adhesion due to inter-diffusion at SS/Ge interface. DOCTOR OF PHILOSOPHY (MAE) 2015-03-11T01:37:57Z 2015-03-11T01:37:57Z 2014 2014 Thesis Rahmat, A. S.(2014). Investigation of nickel oxide and germanium for Li-ion battery anodes. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/62246 10.32657/10356/62246 en 176 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Rahmat, Agung Susantyoko Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title | Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title_full | Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title_fullStr | Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title_full_unstemmed | Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title_short | Investigation of nickel oxide and germanium for Li-ion battery anodes |
| title_sort | investigation of nickel oxide and germanium for li ion battery anodes |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/62246 |
| work_keys_str_mv | AT rahmatagungsusantyoko investigationofnickeloxideandgermaniumforliionbatteryanodes |