High-Temperature Stable Anatase Titanium Oxide Nanofibers for Lithium-Ion Battery Anodes
被引:17
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作者:
Lee, Sangkyu
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Hanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 08826, South KoreaHanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
Lee, Sangkyu
[1
,3
]
Eom, Wonsik
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Hanyang Univ, Dept Organ & Nano Engn, Seoul 04763, South KoreaHanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
Eom, Wonsik
[2
]
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Park, Hun
[2
]
Han, Tae Hee
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机构:
Hanyang Univ, Dept Organ & Nano Engn, Seoul 04763, South KoreaHanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
Han, Tae Hee
[2
]
机构:
[1] Hanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
[2] Hanyang Univ, Dept Organ & Nano Engn, Seoul 04763, South Korea
[3] Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 08826, South Korea
Control of the crystal structure of electrochemically active materials is an important approach to fabricating high-performance electrodes for lithium-ion batteries (LIBs). Here, we report a methodology for controlling the crystal structure of TiO2 nanofibers by adding aluminum isopropoxide to a common sol-gel precursor solution utilized to create TiO2 nanofibers. The introduction of aluminum cations impedes the phase transformation of electrospun TiO2 nanofibers from the anatase to the rutile phase, which inevitably occurs in the typical annealing process utilized for the formation of TiO2 crystals. As a result, high temperature stable anatase TiO2 nanofibers were created in which the crystal structure was well-maintained even at high annealing temperatures of up to 700 degrees C. Finally, the resulting anatase TiO2 nanofibers were utilized to prepare LIB anodes, and their electrochemical performance was compared to pristine TiO2 nanofibers that contain both anatase and rutile phases. Compared to the electrode prepared with pristine TiO2 nanofibers, the electrode prepared with anatase TiO2 nanofibers exhibited excellent electrochemical performances such as an initial Coulombic efficiency of 83.9%, a capacity retention of 89.5% after 100 cycles, and a rate capability of 48.5% at a current density of 10 C (1 C = 200 mA g(-1)).
机构:
Beijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
Guo, Hongxia
Li, Mingye
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Beijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
Li, Mingye
Li, Fan
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Beijing Univ Technol, Fac Environm & Life, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
Li, Fan
Zhu, Qizhen
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Beijing Univ Chem Technol, Beijing Key Lab Electrochem Proc & Technol Mat, State Key Lab Organ Inorgan Composites, Beisanhuan East Rd 15, Beijing 100029, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
Zhu, Qizhen
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Zhao, Yao
Wang, Feng
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Beijing Univ Technol, Fac Environm & Life, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
Wang, Feng
Qin, Zhenping
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Beijing Univ Technol, Fac Environm & Life, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R ChinaBeijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China
机构:
Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
Rong, Jiepeng
Fang, Xin
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Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
Fang, Xin
Ge, Mingyuan
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Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
Ge, Mingyuan
Chen, Haitian
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机构:
Univ So Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
Chen, Haitian
Xu, Jing
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Univ So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
Xu, Jing
Zhou, Chongwu
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机构:
Univ So Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USAUniv So Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA
机构:
North Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USANorth Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USA
Fu, Kun
Jia, Hao
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North Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USANorth Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USA
Jia, Hao
Stano, Kelly
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North Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USANorth Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USA
Stano, Kelly
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Zhang, Xiangwu
Bradford, Philip D.
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North Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USANorth Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27606 USA