Subzero temperature promotes stable lithium storage in SnO2
作者:Tan, L (Tan, Liang)[ 1 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Zhang, HY (Zhang, Hanyin)[ 1 ] ; Lan, XX (Lan, Xuexia)[ 1 ] ; Liu, J (Liu, Jun)[ 1 ] ; Wang, H (Wang, Hui)[ 1 ] ; Yuan, B (Yuan, Bin)[ 1 ] ; Zhu, M (Zhu, Min)[ 1 ]
ENERGY STORAGE MATERIALS
卷: 36 页: 242-250
DOI: 10.1016/j.ensm.2020.12.033
出版年: APR 2021
文献类型:Article
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摘要
It is known that low operating temperature reduces significantly the discharging capacity and cycling stability of lithium ion battery (LIB). In addition LIBs are unable to charge at subzero temperatures because of the propensity for Li dendrite formation on graphite anodes. The present work we found that SnO2 anode can deliver high capacity under subzero temperature, 71% of its 30 degrees C capacity at -20 degrees C in a commercial LiPF6-EC/PC based electrolyte, which is much higher than that of intercalating graphite and Li4Ti5O12, alloying Si-C anodes and other materials. Most surprisingly, different from the serious capacity attenuation of electrodes occurring at room temperature, subzero temperatures effectively promotes the good cycling stability of pure SnO2 anodes toward Li storage. High capacities of 603.1 mAh g(-1) at -20 degrees C and 423.8 mAh g(-1) at -30 degrees C can be maintained stable throughout the cycles. In-situ X-ray diffraction monitoring reveals that subzero temperature suppresses Sn coarsening in lithiated SnO2 anodes to maintain a high reversibility for alloying and conversion reactions, which ensures stable capacities in 0-1.0 V and 1.0-2.4 V potential range. Furthermore, allotropy transformation from beta-Sn to alpha-Sn could be helpful to build faster transfer channels for Li-ions during de-/lithiation in subzero temperatures. This work shows that SnO2-based anode materials could qualify the LIBs for a safe and long-life running in low-temperature environments.
关键词
作者关键词:Lithium ion battery; Tin dioxide; Low temperature battery; Allotropy transformation; Conversion reaction
作者信息
通讯作者地址:
South China University of Technology South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.
通讯作者地址: Hu, RZ; Zhu, M (通讯作者)
显示更多 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.
地址:
显示更多 [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China
电子邮件地址:msrenzonghu@scut.edu.cn; memzhu@scut.edu.cn
基金资助致谢
基金资助机构显示详情 授权号
National Natural Science Foundation of China (NSFC)
52071144
51822104
51621001
51831009
National key research and development program
2016YFA0202603
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出版商
ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Science & Technology - Other Topics; Materials Science
Web of Science 类别:Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary