Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges
Lithium titanate (Li4Ti5O12 or LTO) is a promising negative electrode material of high power lithium-ion batteries, due to its superior rate capability and excellent capacity retention. However, the specific capacity of LTO is less than one half of that of graphite electrode. In this work, we applie...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-06-01
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| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fenrg.2015.00021/full |
| _version_ | 1818889144383832064 |
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| author | Dongjoon eAhn Xingcheng eXiao |
| author_facet | Dongjoon eAhn Xingcheng eXiao |
| author_sort | Dongjoon eAhn |
| collection | DOAJ |
| description | Lithium titanate (Li4Ti5O12 or LTO) is a promising negative electrode material of high power lithium-ion batteries, due to its superior rate capability and excellent capacity retention. However, the specific capacity of LTO is less than one half of that of graphite electrode. In this work, we applied ultrathin oxide coating on LTO by the atomic layer deposition (ALD) technique, aiming for increasing the energy density by extending the cell voltage window and specific capacity of LTO. We demonstrated that a few nanometer thick Al2O3 coating can suppress the mechanical distortion of LTO cycled at low potential, which enable the higher specific capacity and excellent capacity retentio. Furthermore, the surface coating can facilitate the charge transfer, leading to significantly improved rate capabilities, comparing with the uncoated LTO. |
| first_indexed | 2024-12-19T17:04:21Z |
| format | Article |
| id | doaj.art-a439ff803b694d77845db7c9248208b5 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-19T17:04:21Z |
| publishDate | 2015-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-a439ff803b694d77845db7c9248208b52022-12-21T20:13:13ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2015-06-01310.3389/fenrg.2015.00021133338Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage RangesDongjoon eAhn0Xingcheng eXiao1University of KentuckyGeneral Motors R&D CenterLithium titanate (Li4Ti5O12 or LTO) is a promising negative electrode material of high power lithium-ion batteries, due to its superior rate capability and excellent capacity retention. However, the specific capacity of LTO is less than one half of that of graphite electrode. In this work, we applied ultrathin oxide coating on LTO by the atomic layer deposition (ALD) technique, aiming for increasing the energy density by extending the cell voltage window and specific capacity of LTO. We demonstrated that a few nanometer thick Al2O3 coating can suppress the mechanical distortion of LTO cycled at low potential, which enable the higher specific capacity and excellent capacity retentio. Furthermore, the surface coating can facilitate the charge transfer, leading to significantly improved rate capabilities, comparing with the uncoated LTO.http://journal.frontiersin.org/Journal/10.3389/fenrg.2015.00021/fullAtomic Layer Deposition (ALD)surface coatingrate capabilityLithium titanateOxide coating |
| spellingShingle | Dongjoon eAhn Xingcheng eXiao Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges Frontiers in Energy Research Atomic Layer Deposition (ALD) surface coating rate capability Lithium titanate Oxide coating |
| title | Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges |
| title_full | Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges |
| title_fullStr | Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges |
| title_full_unstemmed | Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges |
| title_short | Enhanced Rate Capability of Oxide Coated Lithium Titanate within Extended Voltage Ranges |
| title_sort | enhanced rate capability of oxide coated lithium titanate within extended voltage ranges |
| topic | Atomic Layer Deposition (ALD) surface coating rate capability Lithium titanate Oxide coating |
| url | http://journal.frontiersin.org/Journal/10.3389/fenrg.2015.00021/full |
| work_keys_str_mv | AT dongjooneahn enhancedratecapabilityofoxidecoatedlithiumtitanatewithinextendedvoltageranges AT xingchengexiao enhancedratecapabilityofoxidecoatedlithiumtitanatewithinextendedvoltageranges |