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题名: Investigation into the Surface Chemistry of Li4Ti5O12 Nanoparticles for Lithium Ion Batteries
作者: Wang, Yongqing1, 2; Zhao, Jing3; Qu, Jin4; Wei, Fangfang5; Song, Weiguo6; Guo, Yu-Guo6; Xu, Baomin2
关键词: lithium-ion battery ; swelling ; Li4Ti5O12 ; Lewis acid ; carbon dioxide
刊名: ACS APPLIED MATERIALS & INTERFACES
发表日期: 2016-10-05
卷: 8, 期:39, 页:26008-26012
收录类别: SCI
英文摘要: Elucidating surface chemistry of Li4Ti5O12 anode material plays a critical role in solving gas evolution in Li4Ti5O12-based lithium ion batteries. Herein, we propose a CO2 cycloaddition reaction to study the surface chemistry of Li4Ti5O12 nanoparticles. Through the reaction, bare Li4Ti5O12 nanoparticles were demonstrated to have extensive Lewis-acid sites, that is, dangling Ti bonds or hydroxyl groups. Lewis-acid site is considered to be able to initiate the decomposition of electrolyte solvents and may also serve as one of the main reasons for gas evolution. TiNx coating layer is used to cover up the Lewis-acid site and is able to decrease yield of the cycloaddition reaction to some extent. These findings may provide a simple yet very effective way to evaluate surface chemistry and gas evolution in other lithium ion batteries, not limited to Li4Ti5O12-based batteries.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35633
Appears in Collections:分子纳米结构与纳米技术实验室_期刊论文

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作者单位: 1.Sun Yat Sen Univ, Sch Chem & Chem Engn, Dept Chem Engn, Guangzhou 510275, Guangdong, Peoples R China
2.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, Shenzhen Inst Adv Technol, Ctr Gene & Cell Engn, Inst Biomed & Biotechnol, Shenzhen 518055, Peoples R China
4.Beijing Univ Chem Technol, Coll Mat Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
5.Anshun Univ, Anshun Econ Dev Zone, 25 Xue Yuan Rd, Anshun 561000, Guizhou, Peoples R China
6.Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China
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