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作者
作者:Sun, W (Sun, Wei)[1 ]; Hu, RZ (Hu, Renzong)[1 ]; Liu, H (Liu, Hui)[1 ]; Zeng, MQ (Zeng, Meiqin)[1 ]; Yang, LC (Yang, Lichun)[1 ]; Wang, HH (Wang, Haihui)[2 ]; Zhu, M (Zhu, Min)[1 ]
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文献类型:Article
摘要
The lithium storage performance of silicon (Si) is improved substantially by forming composite of nano-Si particles embedded homogeneously in graphene nanosheets (GNs) using a simple discharge plasma assisted milling (P-milling) method. The synergistic effect of the rapid heating of the plasma and the mechanical ball mill grinding with nano-Si as nanomiller converted the graphite powder to GNs with the integration of nano-Si particles in the in-situ formed GNs. This composite structure inhibits the agglomeration of nano-Si and improves electronic conductivity. The cycling stability and rate capability are enhanced, with a stable reversible capacity of 976 mAhg(-1) at 50 mAg(-1) for the P-milled 20 h nano-Si/GNs composite. A full cell containing a commercial LiMn2O4 cathode is assembled and demonstrated a satisfying utilization of the P-milled nano-Si/GNs composite anode with stable working potential. This composite shows promise for application in lithium ion batteries. (C) 2014 Elsevier B.V. All rights reserved.
关键词
作者关键词:Lithium ion batteries; Silicon anode; Graphene nanosheets; Discharge plasma; Ball milling
作者信息
通讯作者地址:Zhu, M (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China. |
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电子邮件地址:memzhu@scut.edu.cn
出版商
类别分类
研究方向:Chemistry; Electrochemistry; Energy & Fuels; Materials Science
Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary
标题
作者
作者:Cai, WT (Cai, Weitong)[1,2,9 ]; Wang, H (Wang, Hui)[1,2,9 ]; Liu, JW (Liu, Jiangwen)[1,2,9 ]; Jiao, LF (Jiao, Lifang)[3 ]; Wang, YJ (Wang, Yijing)[3,4 ]; Ouyang, LZ (Ouyang, Liuzhang)[1,2,9 ]; Sun, T (Sun, Tai)[5 ]; Sun, DL (Sun, Dalin)[6 ]; Wang, HH (Wang, Haihui)[7 ]; Yao, XD (Yao, Xiangdong)[8,9 ]
期刊信息
摘要
The nanostructured CoB of morphologies, being rod-like, flake-like, chain-like, waxberry-like and mulberry-like, was synthesized, and then doped into LiBH4 by ball milling. CoB played as pure catalyst facilitating de/rehydrogenation of LiBH4, and its morphology greatly influenced the catalytic activity. The catalytic effect of CoB is approximately in the order of mulberry-like>waxberry-like>chain-like>flake-like>rod-like, in accordance with their specific surface area from high to low. For dehydrogenation at 200 degrees C, mulberry-like and waxberry-like CoB dramatically enhanced the dehydrogenation of LiBH4, but not other CoB catalysts. 4.6 and 4.8 wt% hydrogen was released from LiBH4 catalyzed by those two CoB, respectively, and the later showed reversibility of >2 wt%. For dehydrogenation at 350 degrees C, mulberry-like CoB showed the best catalytic effect. 10.4 wt% hydrogen was liberated from LiBH4 with almost full reversibility under 400 degrees C and 10 MPa rehydrogenation conditions, remaining 9.6 wt% at the fourth cycle. (C) 2014 Elsevier Ltd. All rights reserved.
关键词
作者关键词:Hydrogen storage; Complex hydride; LiBH4; Cobalt boride; Catalyst
作者信息
通讯作者地址:Wang, YJ (通讯作者)
| Nankai Univ, Key Lab Adv Energy Mat Chem MOE, Inst New Mat Chem, Tianjin 300071, Peoples R China. |
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电子邮件地址:wangyj@nankai.edu.cn; dlsun@fudan.edu.cn; memzhu@scut.edu.cn
出版商
类别分类
研究方向:Chemistry; Science & Technology - Other Topics; Materials Science; Physics
Web of Science 类别:Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied